{"id":10171,"date":"2026-08-20T16:06:54","date_gmt":"2026-08-20T14:06:54","guid":{"rendered":"https:\/\/smartfabrik.de\/knx-rf-wireless\/"},"modified":"2026-08-23T10:12:08","modified_gmt":"2026-08-23T08:12:08","slug":"knx-rf-wireless","status":"publish","type":"page","link":"https:\/\/smartfabrik.de\/en\/knx-service\/knx-rf-wireless\/","title":{"rendered":"KNX RF Wireless: Retrofit Without New Cables | smartfabrik"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"10171\" class=\"elementor elementor-10171 elementor-10170\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-sfsec0001 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"sfsec0001\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-sfcol0001\" data-id=\"sfcol0001\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-sfwid0001 elementor-widget elementor-widget-html\" data-id=\"sfwid0001\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>.elementor-widget-html{font-family:'Lato','Segoe UI',system-ui,-apple-system,Arial,sans-serif}.elementor-widget-html *{font-family:inherit}<\/style><style>\r\n:root{--cyan:#00CCFF;--cyan-ink:#007FA3;--ink:#0C0E10;--text:#343434;--muted:#71787E;--line:#E3E8EC;--ground:#F4F7F9;--paper:#fff;--champ:#C9A96A}\r\n\/*ARABISCH*\/\r\n\/* Noto Sans Arabic, selbst gehostet, variabel. 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.gwgrid{grid-template-columns:1fr}}\r\n.sp .gwcell{padding:26px 24px;border-inline-start:1px solid var(--line);border-top:1px solid var(--line);transition:background .35s}\r\n.sp .gwgrid .gwcell:nth-child(-n+4){border-top:none}\r\n.sp .gwgrid .gwcell:nth-child(4n+1){border-inline-start:none}\r\n@media(max-width:1000px){.sp .gwgrid .gwcell:nth-child(-n+4){border-top:1px solid var(--line)}.sp .gwgrid .gwcell:nth-child(-n+2){border-top:none}.sp .gwgrid .gwcell:nth-child(4n+1){border-inline-start:1px solid var(--line)}.sp .gwgrid .gwcell:nth-child(odd){border-inline-start:none}}\r\n@media(max-width:600px){.sp .gwgrid .gwcell{border-inline-start:none !important;border-top:1px solid var(--line) !important}.sp .gwgrid .gwcell:first-child{border-top:none !important}}\r\n@media(hover:hover){.sp .gwgrid:hover .gwcell:not(:hover){opacity:.5}.sp .gwcell:hover{background:linear-gradient(180deg,#F7FCFE,#fff 55%)}}\r\n.sp .gwnum{display:block;font-weight:800;font-size:11.5px;letter-spacing:.16em;color:#B7C0C7;margin-bottom:10px}\r\n.sp .gwcell h3{font-weight:900;font-size:16px;margin-bottom:8px;letter-spacing:-.01em}\r\n.sp .gwcell p{font-size:13.5px;color:var(--muted);line-height:1.6;margin:0}\r\n.sp .gwclose{margin-top:30px;text-align:center;font-size:17px;color:var(--text);max-width:74ch;margin-inline-start:auto;margin-inline-end:auto}\r\n.sp .gwclose strong{color:var(--ink);font-weight:900}\r\n\/* orte *\/\r\n.sp .orte{background:var(--ground);border-top:1px solid var(--line);padding:64px 0}\r\n.sp .orte.onpaper{background:var(--paper)}\r\n.sp .ochips{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}\r\n.sp .ochips a{font-weight:800;font-size:13px;color:var(--ink);background:var(--paper);border:1px solid var(--line);border-radius:999px;padding:9px 17px;text-decoration:none;transition:border-color .2s,transform .15s,color .2s}\r\n.sp .orte.onpaper .ochips a{background:var(--ground)}\r\n.sp .ochips a:hover{border-color:var(--cyan);color:var(--cyan-ink);transform:translateY(-1px)}\r\n\/* faq + cta *\/\r\n.sp .faq{padding:80px 0}\r\n\/*PREMIUM*\/\r\n\/* 28 gestapelte Kacheln waren die gr\u00f6\u00dfte Fl\u00e4che der Seite. Haarlinien wie \u00fcberall sonst. *\/\r\n.sp details{border:0;border-bottom:1px solid var(--line);border-radius:0;margin:0;background:none;overflow:visible}\r\n.sp .faq details:first-of-type{border-top:1px solid var(--line)}\r\n\/* Die Innenabst\u00e4nde stehen weiter unten als Kurzform und w\u00fcrden Einzelwerte hier wieder\r\n   \u00fcberschreiben \u2014 deshalb sind sie dort ge\u00e4ndert, nicht hier. *\/\r\n@media(max-width:640px){.sp details p{padding-inline-end:0}}\r\n.sp summary{cursor:pointer;font-weight:800;font-size:15.5px;color:var(--ink);padding:19px 4px 19px 0;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px}\r\n.sp summary::-webkit-details-marker{display:none}\r\n.sp summary::after{content:\"+\";font-weight:900;font-size:20px;color:var(--cyan-ink);transition:transform .2s}\r\n.sp details[open] summary::after{transform:rotate(45deg)}\r\n.sp details p{padding:0 44px 22px 0;margin:0;font-size:15px;color:var(--muted);line-height:1.65;max-width:80ch}\r\n.sp .cta{background:radial-gradient(120% 130% at 50% 0%,#17212b,#0a0e12 70%);color:#fff;text-align:center;padding:80px 0;border-top:1px solid rgba(255,255,255,.07)}\r\n.sp .cta .eyebrow{color:var(--champ)}.sp .cta .eyebrow::before{background:var(--champ)}\r\n.sp .cta h2{color:#fff;font-weight:900;font-size:clamp(26px,3.8vw,40px);margin-top:14px}\r\n.sp .cta p{color:rgba(255,255,255,.72);max-width:58ch;margin:14px auto 0}\r\n.sp .cta .btn{margin-top:28px}\r\n.sp .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s,transform .7s}.sp .reveal.in{opacity:1;transform:none}\r\n@media(prefers-reduced-motion:reduce){.sp .reveal{opacity:1;transform:none;transition:none}}\r\n.blpnav{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid #E3E8EC;font-family:'Lato',system-ui,sans-serif}\r\n.blpnav .nwrap{max-width:1180px;margin:0 auto;padding:0 32px;display:flex;align-items:center;justify-content:space-between;height:74px;gap:20px}\r\n.blpnav .blogo{background-image:url(\"\/wp-content\/uploads\/sf\/db0cb34024.svg\");background-repeat:no-repeat;background-position:left center;background-size:contain;display:inline-block;;width:168px;height:34px;background-repeat:no-repeat;background-size:contain;background-position:left center;display:block;flex:none}\r\n.blpnav .blogo-t,.blpfoot .blogo-t{font-weight:900;font-size:20px;color:#0C0E10;text-decoration:none}\r\n.blpnav .bmenu{display:flex;gap:26px;list-style:none;margin:0;padding:0}\r\n.blpnav .bmenu a{color:#0C0E10;text-decoration:none;font-weight:700;font-size:14.5px}\r\n.blpnav .bmenu a:hover{color:#007FA3}\r\n\/*KOPF-FIX*\/.blpnav .nwrap{gap:18px}.blpnav .bmenu{gap:24px;flex-wrap:nowrap}.blpnav .bmenu a{white-space:nowrap}.blpnav .bmenu li{flex:none}.blpnav .sflang{flex:none;margin-inline-start:4px;padding-inline-start:18px;border-inline-start:1px solid rgba(12,14,16,.12)}@media(max-width:1120px){.blpnav .bmenu{gap:16px}.blpnav .bmenu a{font-size:13.5px}}@media(max-width:980px){.blpnav .bmenu{gap:12px}.blpnav .bmenu a{font-size:13px}}\/*KOPF-FIX-ENDE*\/.blpnav .bnav-cta{flex:none;background:#00CCFF;color:#00252F;font-weight:800;font-size:13.5px;text-decoration:none;border-radius:999px;padding:11px 20px}\r\n.blpnav input.sfnav-cb,.nav input.sfnav-cb{position:absolute;width:1px;height:1px;opacity:0;margin:0;padding:0;border:0;clip-path:inset(50%);overflow:hidden;appearance:none;-webkit-appearance:none}.blpnav .sfnav-burger,.nav .sfnav-burger{display:none;cursor:pointer;width:26px;height:20px;position:relative;flex:0 0 auto;padding:0;vertical-align:baseline;font-size:inherit}.blpnav .sfnav-burger span,.nav .sfnav-burger span,.blpnav .sfnav-burger span::before,.nav .sfnav-burger span::before,.blpnav .sfnav-burger span::after,.nav .sfnav-burger span::after{content:\"\";position:absolute;left:0;width:26px;height:2px;background:currentColor;border-radius:2px;transition:transform .2s,opacity .2s}.blpnav .sfnav-burger span,.nav .sfnav-burger span{top:9px}.blpnav .sfnav-burger span::before,.nav .sfnav-burger span::before{top:-8px}.blpnav .sfnav-burger span::after,.nav .sfnav-burger span::after{top:8px}.blpnav .sfnav-cb:checked+.sfnav-burger span,.nav .sfnav-cb:checked+.sfnav-burger span{background:transparent}.blpnav .sfnav-cb:checked+.sfnav-burger span::before,.nav .sfnav-cb:checked+.sfnav-burger span::before{transform:translateY(8px) rotate(45deg)}.blpnav .sfnav-cb:checked+.sfnav-burger span::after,.nav .sfnav-cb:checked+.sfnav-burger span::after{transform:translateY(-8px) rotate(-45deg)}.blpnav .sfnav-cb:focus-visible+.sfnav-burger,.nav .sfnav-cb:focus-visible+.sfnav-burger{outline:2px solid currentColor;outline-offset:6px}@media(max-width:840px){.blpnav .nwrap{flex-wrap:wrap;height:auto;padding-top:12px;padding-bottom:10px;row-gap:0}.blpnav .sfnav-burger{display:block;order:2;margin-inline-start:auto}.blpnav .bmenu{display:none;order:4;width:100%;flex-direction:column;gap:0;padding:10px 0 2px;border-top:1px solid rgba(12,14,16,.1);margin-top:10px}.blpnav .sfnav-cb:checked~.bmenu{display:flex}.blpnav .bmenu li{width:100%}.blpnav .bmenu a{display:block;padding:11px 0;font-size:15px}.blpnav .bmenu li+li a{border-top:1px solid rgba(12,14,16,.07)}.blpnav .sflang{order:3}}@media(max-width:560px){.blpnav .bnav-cta{padding:9px 14px;font-size:12.5px}}\r\n.blpfoot{background:#0C0E10;color:rgba(255,255,255,.7);font-family:'Lato',system-ui,sans-serif;padding:54px 0 30px}\r\n.blpfoot .wrap{max-width:1180px;margin:0 auto;padding:0 32px}\r\n.blpfoot .ftop{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:30px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.12)}\r\n.blpfoot .fregion{font-size:13px;color:rgba(255,255,255,.45);margin-top:4px}\r\n.blpfoot .fregionen{display:flex;flex-wrap:wrap;align-items:center;gap:16px;padding:18px 0;border-bottom:1px solid rgba(255,255,255,.12);font-size:13.5px}\r\n.blpfoot .fregionen span{color:rgba(255,255,255,.45);font-weight:800;letter-spacing:.06em;text-transform:uppercase;font-size:11.5px}\r\n@media(max-width:980px){.blpfoot .ftop{grid-template-columns:1fr 1fr}}\r\n@media(max-width:760px){.blpfoot .ftop{grid-template-columns:1fr;gap:24px}}\r\n.blpfoot .blogo{background-image:url(\"\/wp-content\/uploads\/sf\/db0cb34024.svg\");background-repeat:no-repeat;background-position:left center;background-size:contain;display:inline-block;;width:168px;height:34px;background-repeat:no-repeat;background-size:contain;background-position:left center;display:block}\r\n.blpfoot .fbrand p{font-size:13.5px;margin:16px 0 0;max-width:46ch;line-height:1.6}\r\n.blpfoot .fcol{display:flex;flex-direction:column;gap:11px}\r\n.blpfoot .fh{font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.45)}\r\n.blpfoot a{color:rgba(255,255,255,.72);text-decoration:none;font-size:14px}.blpfoot a:hover{color:#40d0ff}\r\n.blpfoot .fbot{display:flex;justify-content:space-between;align-items:center;padding-top:22px;font-size:12.5px;color:rgba(255,255,255,.5)}\r\n.blpfoot .fbot nav{display:flex;gap:18px}\r\n<\/style><style>\/*PREMIUM*\/\r\n.sp .sband{background:radial-gradient(130% 120% at 50% -10%,#18222c,#0a0e12 70%);padding:62px 0}\r\n.sp .sband .prmedia{grid-template-columns:1.4fr 1fr}\r\n@media(max-width:700px){.sp .sband .prmedia{grid-template-columns:1fr}.sp .sband .prmedia figure.tall{grid-row:auto}}\r\n\/* .sympt hat nur im CSS der \u00dcbersichtsseite Abstand. Auf den vier Silo-Seiten klebte\r\n   \u201eDie Ausgangslage\" ohne Luft direkt unter dem Hero. *\/\r\n.sp .sympt{padding:74px 0 0}\/*SILO-KOSTEN*\/\r\n.sp .skost{background:var(--paper);padding:72px 0;border-top:1px solid var(--line)}\r\n.sp .skgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:32px;border-top:1px solid var(--line)}\r\n@media(max-width:820px){.sp .skgrid{grid-template-columns:1fr}}\r\n.sp .skz{padding:26px 30px 26px 0}\r\n.sp .skz+.skz{border-inline-start:1px solid var(--line);padding-inline-start:30px}\r\n@media(max-width:820px){.sp .skz+.skz{border-inline-start:0;padding-inline-start:0;border-top:1px solid var(--line)}}\r\n.sp .skz strong{display:block;font-size:clamp(22px,2.6vw,30px);font-weight:900;color:var(--ink);letter-spacing:-.02em}\r\n.sp .skz>span{display:block;margin-top:5px;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan-ink);font-weight:800}\r\n.sp .skz p{margin-top:12px;font-size:14.5px;line-height:1.68;color:var(--text)}\r\n.sp .sbeweis{background:var(--paper);padding:74px 0;border-top:1px solid var(--line)}\r\n.sp .sbwbild{margin:32px 0 0}\r\n.sp .sbwbild img{width:100%;height:auto;display:block}\r\n.sp .sbwhin{margin-top:26px;font-size:15.5px;line-height:1.72;color:var(--text);max-width:78ch}\r\n.sp .adhero{position:relative;color:#fff;background:radial-gradient(125% 120% at 50% -10%,#18222c,#0a0e12 66%);padding:84px 0 74px;border-bottom:1px solid rgba(255,255,255,.07)}\r\n.sp .adhero .eyebrow{color:#C9A96A}.sp .adhero .eyebrow::before{background:#C9A96A}\r\n.sp .adhero h1{color:#fff;font-weight:900;font-size:clamp(31px,4.9vw,52px);margin-top:18px;max-width:19ch;letter-spacing:-.028em;line-height:1.08}\r\n.sp .adhero h1 span{color:#40d0ff}\r\n.sp .adhero p.lead{font-size:19px;color:rgba(255,255,255,.76);max-width:64ch;margin-top:18px}\r\n.sp .adbul{display:grid;grid-template-columns:1fr 1fr;gap:10px 30px;margin:30px 0 0;padding:0;list-style:none;max-width:74ch}\r\n@media(max-width:680px){.sp .adbul{grid-template-columns:1fr}}\r\n.sp .adbul li{position:relative;padding-inline-start:26px;font-size:15px;color:rgba(255,255,255,.86);font-weight:700}\r\n.sp .adbul li::before{content:\"\";position:absolute;inset-inline-start:0;top:9px;width:12px;height:2px;background:#00CCFF}\r\n.sp .adcta{display:inline-flex;align-items:center;gap:9px;margin-top:32px;font-weight:800;font-size:15px;color:#00252F;background:#00CCFF;border-radius:999px;padding:15px 28px;text-decoration:none;transition:transform .15s,box-shadow .2s}\r\n.sp .adcta:hover{transform:translateY(-2px);box-shadow:0 16px 34px -12px rgba(0,204,255,.5)}\r\n.sp .symg{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line)}\r\n@media(max-width:860px){.sp .symg{grid-template-columns:1fr}}\r\n.sp .symc{padding:32px 30px 30px;border-inline-start:1px solid var(--line)}\r\n.sp .symc:first-child{border-inline-start:0}\r\n.sp .symc h3{font-weight:900;font-size:18px;letter-spacing:-.02em;margin:0 0 10px}\r\n.sp .symc p{font-size:14.5px;color:var(--muted);margin:0;line-height:1.62}\r\n.sp .backpill{display:inline-flex;align-items:center;gap:9px;font-weight:800;font-size:14px;color:var(--cyan-ink);text-decoration:none;border:1px solid var(--line);border-radius:999px;padding:11px 20px;background:var(--paper);transition:border-color .2s,transform .2s}\r\n.sp .backpill:hover{border-color:var(--cyan);transform:translateX(3px)}\r\n.sp .pnote{margin:26px 0 0;font-size:15px;color:var(--muted);border-inline-start:2px solid var(--cyan);padding-inline-start:18px;max-width:76ch}\r\n\/* Die angrenzenden Faelle. Bewusst Fliesstext und keine Linkliste: wer hier landet, hat eine\r\n   Lage, keine Navigationsabsicht. Ein Satz, der die Nachbarlage benennt, hilft ihm \u2014 eine\r\n   Aufzaehlung von Seitentiteln nicht. *\/\r\n.sp .nachbarn{margin:22px 0 0;font-size:15px;line-height:1.72;color:var(--text);max-width:76ch;padding-top:20px;border-top:1px solid var(--line)}\r\n.sp .nachbarn b{font-weight:800;color:var(--ink)}\r\n.sp .nachbarn a{color:var(--cyan-ink);font-weight:700;text-decoration:underline;text-underline-offset:2px;text-decoration-thickness:1px}\r\n.sp .nachbarn a:hover{text-decoration-thickness:2px}\r\n<\/style><style>.sp .symg.vier{grid-template-columns:repeat(4,1fr)}@media(max-width:1100px){.sp .symg.vier{grid-template-columns:1fr 1fr}}@media(max-width:860px){.sp .symg.vier{grid-template-columns:1fr}}<\/style><style>\/*REKF*\/\/*REKF2*\/\r\n\r\n\/* Anfrage als Gespr\u00e4ch, nicht als Formular. Kein Radius, kein Rahmen, kein Schatten \u2014\r\n   dieselbe Sprache wie die \u00fcbrigen Abschnitte. *\/\r\n.sp .rform{background:var(--ground);padding:86px 0;border-top:1px solid var(--line);scroll-margin-top:96px}\r\n.sp .del+.rform{border-top:0}\r\n.sp .rfgrid{display:grid;grid-template-columns:.82fr 1.18fr;gap:0;align-items:start}\r\n@media(max-width:900px){.sp .rfgrid{grid-template-columns:1fr}}\r\n.sp .rfintro{padding:4px 54px 0 0}\r\n@media(max-width:900px){.sp .rfintro{padding:0 0 36px}}\r\n.sp .rfintro h2{font-weight:900;font-size:clamp(27px,3.6vw,40px);letter-spacing:-.03em;line-height:1.08;margin:14px 0 0;max-width:19ch;text-wrap:balance}\r\n.sp .rfintro>p{margin:16px 0 0;font-size:16.5px;line-height:1.7;color:var(--text);max-width:46ch}\r\n.sp .rfweg{list-style:none;margin:34px 0 0;padding:0;border-top:1px solid var(--line)}\r\n.sp .rfweg li{display:grid;grid-template-columns:30px 1fr;gap:14px;padding:15px 0;border-bottom:1px solid 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.rfform::before{content:\"\";position:absolute;inset-inline-start:0;top:0;bottom:0;width:2px;\r\n  background:linear-gradient(180deg,var(--cyan) 0 96px,var(--line) 96px)}\r\n@media(max-width:900px){.sp .rfform{padding:32px 28px 34px}}\r\n@media(max-width:520px){.sp .rfform{padding:28px 22px 32px}}\r\n.sp .rfhead{margin:0 0 22px;font-weight:800;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}\r\n.sp .rfq{border-top:1px solid var(--line);padding:26px 0 8px}\r\n.sp .rfq:last-of-type{padding-bottom:2px}\r\n.sp .rfqn{display:block;font-weight:800;font-size:11px;letter-spacing:.18em;color:var(--cyan-ink)}\r\n.sp .rfql{font-weight:900;font-size:19px;letter-spacing:-.02em;line-height:1.24;color:var(--ink);margin:9px 0 0;max-width:34ch}\r\n.sp .rfwhy{margin:9px 0 0;font-size:14px;line-height:1.62;color:var(--text);max-width:54ch}\r\n.sp .rffields{display:grid;gap:20px;margin-top:22px}\r\n.sp .rfrow{display:grid;grid-template-columns:1fr 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nicht wie die FAQ-Eintr\u00e4ge aussehen. *\/\r\n.sp .rfform details{background:none;border:0;border-radius:0;margin:16px 0 0;overflow:visible}\r\n.sp .rfform summary{display:inline-flex;align-items:center;gap:9px;padding:0;\r\n  font-weight:800;font-size:13.5px;color:var(--cyan-ink);list-style:none;cursor:pointer}\r\n.sp .rfform summary::-webkit-details-marker{display:none}\r\n.sp .rfform summary::after{content:\"+\";font-weight:900;font-size:16px;color:var(--cyan-ink);transition:transform .2s}\r\n.sp .rfform details[open] summary::after{transform:rotate(45deg)}\r\n.sp .rfform details p{margin:11px 0 0;padding:0 0 0 15px;border-inline-start:1px solid var(--line);\r\n  font-size:13.5px;line-height:1.68;color:var(--text);max-width:58ch}\r\n.sp .rfform details em{font-style:normal;font-weight:800;color:var(--ink)}\r\n.sp .rfhp{position:absolute;inset-inline-start:-9999px;width:1px;height:1px;overflow:hidden}\r\n.sp .rfsend{margin-top:30px;padding-top:26px;border-top:1px solid var(--line)}\r\n.sp .rfsig{margin:0 0 18px;font-size:13.5px;line-height:1.6;color:var(--text)}\r\n.sp .rfbtn{width:100%;justify-content:center;font:inherit;font-weight:800;font-size:16px;color:#00252F;\r\n  background:var(--cyan);border:0;border-radius:999px;padding:17px 26px;cursor:pointer;\r\n  display:inline-flex;align-items:center;gap:10px;transition:transform .15s,box-shadow .2s}\r\n.sp .rfbtn:hover{transform:translateY(-2px);box-shadow:0 16px 34px -12px rgba(0,204,255,.5)}\r\n.sp .rfbtn:disabled{opacity:.55;cursor:default;transform:none;box-shadow:none}\r\n.sp .rfnote{margin:16px 0 0;font-size:12px;line-height:1.6;color:var(--muted)}\r\n.sp .rfnote a{color:var(--cyan-ink)}\r\n.sp .rfnoscript{margin:16px 0 0;padding-inline-start:16px;border-inline-start:2px solid var(--champ);font-size:14px;color:var(--text)}\r\n.sp .rfmsg{margin:0;font-size:14px;font-weight:700;min-height:1px}\r\n.sp .rfmsg.err{margin-top:16px;color:#B4232A}\r\n\/* Der Erfolgsmoment bekommt Gewicht, ohne dass das Skript angefasst wird. *\/\r\n.sp .rfmsg.ok{margin-top:22px;padding-inline-start:18px;border-inline-start:2px solid var(--cyan);\r\n  font-size:17px;font-weight:800;line-height:1.6;color:var(--ink)}\r\n\r\n\/* Silo-Kacheln *\/\r\n.sp .silogrid{display:grid;grid-template-columns:1fr 1fr;gap:0;background:var(--paper);border:1px solid rgba(12,14,16,.1);border-radius:6px;overflow:hidden;box-shadow:0 1px 0 rgba(12,14,16,.05),0 26px 52px -38px rgba(12,14,16,.28)}\r\n@media(max-width:760px){.sp .silogrid{grid-template-columns:1fr}}\r\n.sp .silocell{position:relative;display:block;padding:32px 30px 28px;border-inline-start:1px solid var(--line);border-top:1px solid var(--line);text-decoration:none;color:inherit;transition:background .3s}\r\n.sp .silocell:hover{background:#F4FBFE}\r\n.sp .silonum{font-weight:900;font-size:12px;letter-spacing:.14em;color:var(--cyan-ink)}\r\n.sp .silocell h3{font-weight:900;font-size:19px;letter-spacing:-.02em;margin:10px 0 9px;color:var(--ink)}\r\n.sp .silocell p{font-size:14.5px;color:var(--muted);margin:0 0 16px;line-height:1.62}\r\n.sp .siloar{display:inline-flex;align-items:center;gap:8px;font-weight:800;font-size:13.5px;color:var(--cyan-ink)}\r\n.sp .silocell:hover .siloar .ar{transform:translateX(4px)}\r\n.sp .siloar .ar{transition:transform .2s}\r\n.sp .backpill{display:inline-flex;align-items:center;gap:9px;font-weight:800;font-size:14px;color:var(--cyan-ink);text-decoration:none;border:1px solid var(--line);border-radius:999px;padding:11px 20px;background:var(--paper);transition:border-color .2s,transform .2s}\r\n.sp .backpill:hover{border-color:var(--cyan);transform:translateX(3px)}\r\n.sp .pnote{margin:26px 0 0;font-size:15px;color:var(--muted);border-inline-start:2px solid var(--cyan);padding-inline-start:18px;max-width:76ch}\r\n\n.sflang{display:flex;align-items:center;gap:9px;flex:none;font-size:12px;font-weight:800;letter-spacing:.09em;font-family:'Lato',system-ui,sans-serif}\n.sflang a{color:#8A949B;text-decoration:none}\n.sflang a:hover{color:#007FA3}\n.sflang .on{color:currentColor;opacity:.95}\n@media(max-width:560px){.sflang{gap:6px;font-size:11px;letter-spacing:.06em;margin-inline-start:0;padding-inline-start:10px}}\n<\/style><header class=\"blpnav\" data-sf-lang=\"en\"><div class=\"nwrap\"><a href=\"\/en\/\" class=\"blogo\" aria-label=\"smartfabrik\"><\/a><input type=\"checkbox\" id=\"sfnav\" class=\"sfnav-cb\" aria-label=\"Open menu\"><label for=\"sfnav\" class=\"sfnav-burger\" aria-hidden=\"true\"><span><\/span><\/label><ul class=\"bmenu\"><li><a href=\"\/en\/services\/\">Services<\/a><\/li><li><a href=\"\/en\/knx-service\/\">KNX service<\/a><\/li><li><a href=\"\/en\/projects\/\">Projects<\/a><\/li><li><a href=\"\/en\/partners\/\">Partners<\/a><\/li><li><a href=\"\/en\/team\/\">Team<\/a><\/li><li><a href=\"\/en\/contact\/\">Contact<\/a><\/li><\/ul><div class=\"sflang\"><a href=\"\/knx-rf-funk-vorschau\/\" lang=\"de\">DE<\/a><span class=\"on\">EN<\/span><a href=\"\/ar\/knx-\u0644\u0627\u0633\u0644\u0643\u064a\/\" lang=\"ar\">AR<\/a><\/div><a class=\"bnav-cta\" href=\"\/en\/contact\/\">Talk to us <span class=\"ar\">&rarr;<\/span><\/a><\/div><\/header><div class=\"sp\" data-sf-lang=\"en\">\r\n<section class=\"adhero\"><div class=\"wrap\">\r\n  <span class=\"eyebrow\">Wireless in existing buildings<\/span>\r\n  <h1>Retrofitting KNX wirelessly \u2014 <span>the walls stay closed.<\/span><\/h1>\r\n  <p class=\"lead\">A lived-in house, plastered walls, no refurbishment in sight \u2014 and still the wish for lighting, roller shutters and heating to work together. Within the KNX standard there is a route of its own for that: KNX RF, the radio side of the standard. Push-buttons and sensors run on batteries, the switching and dimming devices find room in existing back boxes or directly at the appliance, and everything is planned as with a wired KNX system \u2014 wireless and cable devices form one system together. That opens two routes: the way into a smart home while the walls stay closed, and the addition to an existing KNX system wherever no bus cable runs. We plan both \u2014 and we also tell you where a cable remains the better choice.<\/p>\r\n  <ul class=\"adbul\"><li>Retrofitting without new cables \u2014 in an occupied house<\/li><li>Wireless and cable: one standard, one system, one project<\/li><li>Lighting, roller shutters, heating, switches \u2014 room by room<\/li><li>Where a cable is better, we say so beforehand<\/li><\/ul>\r\n  <a class=\"adcta\" href=\"#anfrage\">Have a wireless retrofit assessed <span class=\"ar\">&rarr;<\/span><\/a>\r\n<\/div><\/section>\r\n\r\n<section class=\"sympt\"><div class=\"wrap\">\r\n  <div class=\"sec-h\"><span class=\"eyebrow\">The starting point<\/span><h2>Four starting points, no new cable.<\/h2><\/div>\r\n  <div class=\"symg vier\"><div class=\"symc reveal\"><h3>The switch that was always missing<\/h3><p>By the bed a switch for the ceiling light has been missing for years, at the terrace door one for the roller shutters, and behind the new sofa the existing one sits in the wrong place. A wireless push-button in the KNX standard needs neither cable nor back box: it runs on a battery and sits where you need it; its counterpart, the switching device, works at the light fitting or in the existing back box \u2014 without a wall being opened for it.<\/p><\/div><div class=\"symc reveal\"><h3>A house becomes smart, room by room<\/h3><p>The functions of everyday life can be controlled wirelessly: switching and dimming lights, moving roller shutters, controlling the heating room by room, plus sensors for temperature or open windows. The devices for this are fitted into existing back boxes by our own electricians at elektrofabrik \u2014 our sister company \u2014 or by your own contractor. The walls stay closed throughout, and the furniture stays where it stands.<\/p><\/div><div class=\"symc reveal\"><h3>The one room without a bus cable<\/h3><p>The other case: a wired KNX system is already at work in the house, only no bus cable runs to the converted loft, the garage or the repurposed room. Wireless devices close that gap without a cable \u2014 in the same standard and in the same project; a media coupler, a small device that translates between cable and wireless, links the two sides. Scenes and schedules then treat the new rooms like all the others.<\/p><\/div><div class=\"symc reveal\"><h3>Start small, stay in the standard<\/h3><p>A start may be small: one room, a handful of devices. Because KNX RF is part of the KNX standard, every step stays something you can build on \u2014 the system grows further later on by wireless or, if renovation does happen at some point, by cable within the same project. So there is no isolated solution with an app of its own that knows nothing of the rest of the house, and no stopgap that would have to be replaced at the next step.<\/p><\/div><\/div>\r\n<\/div><\/section>\r\n\r\n<section class=\"gew\"><div class=\"wrap\">\r\n  <div class=\"sec-h\"><span class=\"eyebrow\">Our approach<\/span><h2>What we settle before the first device goes on the wall.<\/h2><\/div>\r\n  <div class=\"gwgrid\"><div class=\"gwcell reveal\"><span class=\"gwnum\">01<\/span><h3>The walk-through first, then the device list<\/h3><p>At the beginning there is no technology, but a walk through your home: which rooms we are talking about, what gets in the way day to day, what should be better \u2014 and who operates it, guests and children included? Out of that comes a list of functions first and a list of devices only afterwards. That keeps the system as large as your needs \u2014 and every function has a reason that you have named.<\/p><\/div><div class=\"gwcell reveal\"><span class=\"gwnum\">02<\/span><h3>One standard, one project<\/h3><p>KNX RF is the radio route of the KNX standard: planned and programmed in the ETS \u2014 the software in which every KNX system is created \u2014 and in the same project as the cabled devices. For you that means one system, one way of operating it, one set of documentation, whether a device works wirelessly or sits on the cable. Several manufacturers carry the standard; the choice of wireless devices is smaller than on the cable, but you are not tied to one brand.<\/p><\/div><div class=\"gwcell reveal\"><span class=\"gwnum\">03<\/span><h3>Wireless coverage in the house<\/h3><p>Walls and ceilings absorb wireless signals, and solid building elements absorb more \u2014 so part of the planning is where devices sit and how they reach one another. Where one path is not enough, a repeater is added to pass the signal on; that way even a large house can be covered. How far a signal carries depends on the building \u2014 so we look at the building.<\/p><\/div><div class=\"gwcell reveal\"><span class=\"gwnum\">04<\/span><h3>The thing about the batteries<\/h3><p>Wireless push-buttons and sensors run on batteries \u2014 which is why they need no cable and no back box. Those batteries last several years, and part of the honest picture is this: at some point they get changed. We plan for that \u2014 devices that report in good time, before a battery is empty, have priority when we choose. The switching and dimming devices need none: they sit on the existing power cable.<\/p><\/div><div class=\"gwcell reveal\"><span class=\"gwnum\">05<\/span><h3>Where the cable remains the better choice<\/h3><p>Wireless is the route for walls that stay closed \u2014 not a substitute for every cable. Where refurbishment is happening anyway or a wall is open, we plan the bus cable: it needs no batteries and no wireless planning. If you have a renovation coming up before long, waiting can be the calmer route \u2014 even though the wireless job would reach us sooner. A no to wireless is also a result of this planning.<\/p><\/div><div class=\"gwcell reveal\"><span class=\"gwnum\">06<\/span><h3>Installation, programming, handover<\/h3><p>Battery-powered push-buttons need no connection, the switching and dimming devices go into existing back boxes or close to whatever they switch \u2014 both are fitted by our own electricians at elektrofabrik, our sister company, or by your own contractor. The programming comes from us: every device is given its place in the project, and at the handover we explain to you what reacts where. The documents that go with it belong to you.<\/p><\/div><\/div>\r\n  <p class=\"pnote\">Beyond the detached house, too: in listed buildings and in rented spaces, opening up walls and ceilings often rules itself out \u2014 there KNX RF allows planning within the standard without intervening in the building fabric, and the system behind it stays the same as on the cable.<\/p>\r\n  <p class=\"nachbarn\"><b>Adjacent situations.<\/b> If a KNX bus already runs in your house and only needs to reach further, that is an <a href=\"\/en\/knx-system-extension\/\">extension<\/a> \u2014 there the central question is what the existing system can carry. If it has aged, <a href=\"\/en\/knx-system-modernisation\/\">modernisation<\/a> belongs before that. And if everything is ultimately to come together on one interface, that is described by the <a href=\"\/en\/knx-visualisation-retrofit\/\">retrofitted visualisation<\/a>.<\/p>\r\n<\/div><\/section>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n<section class=\"rform\" id=\"anfrage\"><div class=\"wrap\"><div class=\"rfgrid\">\r\n  <div class=\"rfintro\">\r\n    <span class=\"eyebrow\">Before the decision<\/span>\r\n    <h2>First check what works without a cable.<\/h2>\r\n    <p>What can be solved wirelessly and what is better left on the cable is decided by your house and your project &mdash; not by the device. Four questions, then we sort it out together.<\/p>\r\n    <ol class=\"rfweg\">\r\n      <li><span class=\"rfwn\">01<\/span><div><strong>We read your answers<\/strong> and get back to you &mdash; usually on the same working day.<\/div><\/li>\r\n      <li><span class=\"rfwn\">02<\/span><div><strong>Ten minutes on the phone<\/strong>, in which we sort out what exists and what is missing. A photo of the distribution board helps, but is not a requirement.<\/div><\/li>\r\n      <li><span class=\"rfwn\">03<\/span><div><strong>Then a written assessment<\/strong> with an effort range. Only then do you decide.<\/div><\/li>\r\n    <\/ol>\r\n    <p class=\"rfoffen\">Even \"in your case this is not worth doing\" is a result we will tell you. Both cost you nothing.<\/p>\r\n    <a class=\"rftel\" href=\"tel:+4921183866870\"><span>Rather talk straight away<\/span><strong>+49 211 838 66 870<\/strong><\/a>\r\n  <\/div>\r\n  <form class=\"rfform\" id=\"rf\" data-sf-form=\"knx-rf-funk\">\r\n    <p class=\"rfhead\">Notes for the call<\/p>\r\n    <div class=\"rfq\">\r\n      <span class=\"rfqn\">01<\/span>\r\n      <h3 class=\"rfql\">What is your name, and how can we reach you?<\/h3>\r\n      <p class=\"rfwhy\">We need the email for the written assessment. A number only if you would prefer a callback.<\/p>\r\n      <div class=\"rffields\">\r\n        <div class=\"rfrow\">\r\n          <label>Name<input type=\"text\" id=\"rf-name\" name=\"name\" required autocomplete=\"name\" placeholder=\"First and last name\"><\/label>\r\n          <label>Email<input type=\"email\" id=\"rf-mail\" name=\"mail\" required autocomplete=\"email\" placeholder=\"name@example.com\"><\/label>\r\n        <\/div>\r\n        <div class=\"rfrow\">\r\n          <label>Telephone <span class=\"opt\">optional<\/span><input type=\"tel\" id=\"rf-tel\" name=\"tel\" autocomplete=\"tel\" placeholder=\"with dialling code\"><\/label>\r\n          <label>Company <span class=\"opt\">optional<\/span><input type=\"text\" id=\"rf-firma\" name=\"firma\" autocomplete=\"organization\" placeholder=\"if this is for business\"><\/label>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n    <div class=\"rfq\">\r\n      <span class=\"rfqn\">02<\/span>\r\n      <h3 class=\"rfql\">Which property is this about, and where is it?<\/h3>\r\n      <p class=\"rfwhy\">In the Rhineland we come round. If the property is further away, we start with a remote diagnosis before anyone travels.<\/p>\r\n      <div class=\"rffields\">\r\n        <div class=\"rfrow\">\r\n          <label class=\"rfsel\">Property type<select id=\"rf-art\" name=\"art\">\r\n            <option>House \/ villa<\/option><option>Apartment \/ penthouse<\/option><option>Holiday property abroad<\/option>\r\n            <option>Office building<\/option><option>Logistics hall \/ industrial<\/option><option>Hotel \/ hospitality<\/option><option>Something else<\/option>\r\n          <\/select><\/label>\r\n          <label>Location<input type=\"text\" id=\"rf-ort\" name=\"ort\" placeholder=\"Town or country\"><\/label>\r\n        <\/div>\r\n      <\/div>\r\n    <\/div>\r\n    <div class=\"rfq\">\r\n      <span class=\"rfqn\">03<\/span>\r\n      <h3 class=\"rfql\">Is there an ETS project file?<\/h3>\r\n      <p class=\"rfwhy\">\"I don't know\" is the most common answer here and perfectly fine &mdash; the question only decides where we start.<\/p>\r\n      <div class=\"rffields\">\r\n        <label class=\"rfsel\">Your best guess<select id=\"rf-datei\" name=\"datei\">\r\n          <option>I don't know<\/option><option>No, it's lost<\/option>\r\n          <option>Present, but outdated<\/option><option>Present, but password-protected<\/option>\r\n        <\/select><\/label>\r\n        <details>\r\n          <summary>How do I tell whether the file even exists?<\/summary>\r\n          <p>It ends in <em>.knxproj<\/em> and usually sits in the electrical contractor's handover folder, on a USB stick or as an email attachment. If nothing turns up, that is the normal case with houses that have changed hands &mdash; we then work with what the system itself yields. A photo of the distribution board helps us; please have the cover opened only by a qualified electrician.<\/p>\r\n        <\/details>\r\n      <\/div>\r\n    <\/div>\r\n    <div class=\"rfq\">\r\n      <span class=\"rfqn\">04<\/span>\r\n      <h3 class=\"rfql\">What has prompted this?<\/h3>\r\n      <p class=\"rfwhy\">Two or three sentences are enough. You need no technical terms &mdash; we sort that out in the call.<\/p>\r\n      <div class=\"rffields\">\r\n        <label>Your description<textarea id=\"rf-msg\" name=\"msg\" rows=\"4\" placeholder=\"For example: house taken over in 2023, a push-button in the hallway no longer switches anything, no documentation of the controls.\"><\/textarea><\/label>\r\n      <\/div>\r\n    <\/div>\r\n    <label class=\"rfhp\">Website<input type=\"text\" id=\"rf-web\" name=\"website\" tabindex=\"-1\" autocomplete=\"off\"><\/label>\r\n    <div class=\"rfsend\">\r\n      <p class=\"rfsig\">A planner from our team reads it &mdash; somebody who would later look at the system themselves. We treat details of your property as confidential and never show them in any reference.<\/p>\r\n      <button type=\"submit\" class=\"rfbtn\">Send enquiry &mdash; we will be in touch <span class=\"ar\">&rarr;<\/span><\/button>\r\n      <p class=\"rfnote\">We use your details solely to deal with this enquiry. More in our <a href=\"\/datenschutz\/\">privacy notice<\/a>.<\/p>\r\n      <noscript><p class=\"rfnoscript\">JavaScript is required to send. Call us instead: <a href=\"tel:+4921183866870\">+49 211 838 66 870<\/a> or write to <a href=\"mailto:info@smartfabrik.de\">info@smartfabrik.de<\/a>.<\/p><\/noscript>\r\n      <p class=\"rfmsg\" id=\"rf-status\" role=\"status\"><\/p>\r\n    <\/div>\r\n  <\/form>\r\n<\/div><\/div><\/section>\r\n<script>(function(){\r\n  var f=document.getElementById('rf'); if(!f) return;\r\n  var s=document.getElementById('rf-status');\r\n  function v(id){var e=document.getElementById(id);return e?e.value.trim():''}\r\n  f.addEventListener('submit',function(ev){\r\n    ev.preventDefault();\r\n    if(!v('rf-name')||!v('rf-mail')){s.textContent='Bitte Name und E-Mail angeben.';s.className='rfmsg err';return}\r\n    var btn=f.querySelector('.rfbtn'); btn.disabled=true; s.textContent='Wird gesendet \\u2026'; s.className='rfmsg';\r\n    var msg='Objektart: '+v('rf-art')+'\\nStandort: '+v('rf-ort')+'\\nETS-Datei: '+v('rf-datei')\r\n      +(v('rf-firma')?'\\nFirma: '+v('rf-firma'):'')+'\\n\\n'+v('rf-msg');\r\n    var attr={}; try{ if(window.sfTrack) attr=window.sfTrack.attr() }catch(e){}\r\n    fetch('\/wp-json\/sf\/v1\/contact',{method:'POST',headers:{'Content-Type':'application\/json'},\r\n      body:JSON.stringify({name:v('rf-name'),tel:v('rf-tel'),mail:v('rf-mail'),art:v('rf-art'),msg:msg,\r\n        quelle:\"Funk im Bestand\",page:location.pathname,website:v('rf-web'),sf_attr:JSON.stringify(attr)})})\r\n    .then(function(r){return r.json()}).then(function(j){\r\n      if(j&&j.ok){ btn.style.display='none';\r\n        s.textContent='Danke \\u2014 wir melden uns in der Regel am selben Werktag.'; s.className='rfmsg ok';\r\n        try{ if(window.sfLead){ window.sfLead({form_id:\"knx-rf-funk\",lead_type:'rekonstruktion',email:v('rf-mail'),phone:v('rf-tel')}) } else { (window.dataLayer=window.dataLayer||[]).push({event:'sf_lead',form_id:\"knx-rf-funk\",lead_type:'rekonstruktion'}) } }catch(e){}\r\n      } else { btn.disabled=false; s.textContent='Das hat nicht geklappt. Bitte rufen Sie uns kurz an: +49 211 838 66 870.'; s.className='rfmsg err' }\r\n    }).catch(function(){ btn.disabled=false; s.textContent='Das hat nicht geklappt. Bitte rufen Sie uns kurz an: +49 211 838 66 870.'; s.className='rfmsg err' });\r\n  });\r\n})();<\/script>\r\n\r\n<section class=\"faq\"><div class=\"wrap\"><div class=\"sec-h\"><span class=\"eyebrow\">FAQ<\/span><h2>Clearly answered.<\/h2><\/div><details><summary>Can a smart home really be retrofitted without opening walls?<\/summary><p>Yes. KNX RF is the radio route of the KNX standard and is made for exactly this situation: push-buttons and sensors run on batteries and need no cable \u2014 they go to the spot where they are needed. The switching and dimming devices need power and therefore sit where power already is: in the existing back box, at the light, at the roller shutter motor \u2014 fitted by elektrofabrik or your own contractor. New cables, chases or opened walls are not needed. Two limits belong to an honest answer: where there is no power at all, at an awning without a supply for instance, wireless does not help either. And the wireless coverage is planned, not assumed.<\/p><\/details><details><summary>We already have a cabled KNX system \u2014 does wireless fit with it?<\/summary><p>Yes. Wireless devices become part of the same system and the same project, joined by a media coupler that mediates between bus cable and wireless. For operation, scenes and schedules the room is then one like any other in the house. This is the right route for the one place a bus cable never reached. Two things we settle beforehand: whether the ETS project for your system exists \u2014 if it is missing, the route starts with the system readout, which has a page of its own \u2014 and whether the wireless connection carries as far as the planned place. If it is about more than that one place, energy systems for instance, our page on extension describes that.<\/p><\/details><details><summary>How long do the batteries in the wireless push-buttons last \u2014 and who changes them?<\/summary><p>Several years. A more precise figure depends on the individual device and on how often it is used \u2014 which is why we give none. If a battery runs down, nothing comes to a standstill because of it: only that one control point pauses, the switching and dimming devices are on power and carry on working. There are two ways to change it, and you decide: at a service visit, when someone is at the system anyway, or by yourself \u2014 it takes only a few simple steps, and we show you them at handover.<\/p><\/details><details><summary>Our house is large and solidly built \u2014 will a wireless signal reach everywhere?<\/summary><p>With planning: yes. Walls and ceilings weaken a wireless signal, solid building elements more than light ones. That is why we promise no range in metres but plan the coverage on your particular building: where the devices sit, which distances they have to bridge and at which point a repeater carries the signal onward. A large house over several floors can be reached this way too. If the planning shows that a place cannot be reached reliably by wireless, we tell you so \u2014 for that place the cable then remains, or a deliberate decision to do without, but not a system that only responds sometimes.<\/p><\/details><details><summary>What does it cost to retrofit KNX wirelessly?<\/summary><p>For that we would have to know what is to be built \u2014 and that is exactly what we settle first, which is why no figure appears here. The scope runs from a single wireless push-button on an existing system to a whole house fitted out room by room; a flat rate would do neither case justice. After the walk-through and the list of functions the effort can be stated, not before. The invoices remain separate: planning, programming and documentation lie with us; devices and installation lie with our own electricians at elektrofabrik \u2014 our sister company \u2014 or with your own contractor. The project file and the documents are handed over to you at the end.<\/p><\/details><\/div><\/section>\r\n\r\n<section class=\"del\"><div class=\"wrap\" style=\"text-align:center\">\r\n  <span class=\"eyebrow\" style=\"justify-content:center\">The full picture<\/span>\r\n  <h2 style=\"font-weight:900;font-size:clamp(23px,3vw,32px);margin:14px 0 20px\">All about the KNX service<\/h2>\r\n  <p style=\"color:var(--muted);max-width:62ch;margin:0 auto 26px\">Wireless is one of several routes for a system \u2014 whether it already exists or is only just being built. The overview sorts them by your starting position.<\/p>\r\n  <a class=\"backpill\" href=\"\/en\/knx-service\/\">To the KNX service overview <span class=\"ar\">&rarr;<\/span><\/a>\r\n<\/div><\/section>\r\n\r\n<section class=\"orte\"><div class=\"wrap\">\r\n  <div class=\"sec-h\"><span class=\"eyebrow\">Where we work<\/span><h2>KNX service in Cologne, D\u00fcsseldorf &amp; NRW.<\/h2>\r\n  <p>smartfabrik is a smart home planning practice based in D\u00fcsseldorf (Reisholzer Werftstr. 31A). We plan for private clients and companies in Cologne, D\u00fcsseldorf and across North Rhine-Westphalia \u2014 and, where wanted, nationwide and internationally. A selection of the places we have already planned and delivered in:<\/p><\/div>\r\n  <div class=\"ochips\"><a href=\"\/en\/smart-home-cologne\/\">Cologne-Marienburg<\/a><a href=\"\/en\/smart-home-cologne\/\">Cologne-Rodenkirchen<\/a><a href=\"\/en\/smart-home-cologne\/\">Cologne-S\u00fcrth<\/a><a href=\"\/en\/smart-home-cologne\/\">Cologne-Lindenthal<\/a><a href=\"\/en\/smart-home-cologne\/\">Cologne-Braunsfeld<\/a><a href=\"\/en\/smart-home-duesseldorf\/\">D\u00fcsseldorf-Oberkassel<\/a><a href=\"\/en\/projects\/\">Neuss<\/a><a href=\"\/en\/projects\/\">Kaarst<\/a><a href=\"\/en\/projects\/\">Moers<\/a><a href=\"\/en\/projects\/\">Essen<\/a><a href=\"\/en\/projects\/\">Solingen<\/a><a href=\"\/en\/smart-home-cologne\/\">Br\u00fchl<\/a><a href=\"\/en\/projects\/\">Aachen<\/a><a href=\"\/en\/projects\/\">Berlin<\/a><a href=\"\/en\/projects\/\">Hamburg<\/a><a href=\"\/en\/projects\/\">Mainz<\/a><a href=\"\/en\/projects\/\">Mallorca<\/a><a href=\"\/en\/projects\/\">Riyadh<\/a><\/div>\r\n<\/div><\/section>\r\n<\/div><footer class=\"blpfoot\" data-sf-lang=\"en\"><div class=\"wrap\"><div class=\"ftop\"><div class=\"fbrand\"><a href=\"\/en\/\" class=\"blogo\" aria-label=\"smartfabrik\"><\/a><p>Manufacturer-independent smart home &amp; KNX planning. Carried out by elektrofabrik. Cologne \u00b7 D\u00fcsseldorf \u00b7 NRW.<\/p><\/div><nav class=\"fcol\"><span class=\"fh\">Services<\/span><a href=\"\/en\/services\/\">All services<\/a><a href=\"\/en\/for-private-clients\/\">For private clients<\/a><a href=\"\/en\/for-developers\/\">For developers &amp; commercial<\/a><a href=\"\/en\/basalte\/\">Basalte<\/a><a href=\"\/en\/network-security-systems\/\">Network &amp; security<\/a><a href=\"\/en\/knx-service\/\">KNX service<\/a><\/nav><nav class=\"fcol\"><span class=\"fh\">Company<\/span><a href=\"\/en\/projects\/\">Projects<\/a><a href=\"\/en\/partners\/\">Partners<\/a><a href=\"\/en\/team\/\">Team<\/a><a href=\"\/en\/smartnews\/\">smartnews<\/a><\/nav><nav class=\"fcol\"><span class=\"fh\">Contact<\/span><a href=\"tel:+4921183866870\">+49 211 838 66 870<\/a><a href=\"mailto:info@smartfabrik.de\">info@smartfabrik.de<\/a><a href=\"\/en\/contact\/\">Contact form<\/a><span class=\"fregion\">Cologne \u00b7 D\u00fcsseldorf \u00b7 North Rhine-Westphalia<\/span><\/nav><\/div><div class=\"fregionen\"><span>Locally:<\/span><a href=\"\/en\/smart-home-cologne\/\">Smart Home Cologne<\/a><a href=\"\/en\/smart-home-duesseldorf\/\">Smart Home D\u00fcsseldorf<\/a><\/div><div class=\"fbot\"><span>\u00a9 smartfabrik \u00b7 Cologne \u00b7 D\u00fcsseldorf \u00b7 NRW<\/span><nav><a href=\"\/en\/imprint\/\">Legal notice<\/a><a href=\"\/en\/privacy-policy\/\">Privacy<\/a><\/nav><\/div><\/div><\/footer><script>(function(){var io=new IntersectionObserver(function(es){es.forEach(function(e){if(e.isIntersecting){e.target.classList.add('in');io.unobserve(e.target)}})},{threshold:.08});document.querySelectorAll('.sp .reveal').forEach(function(el){io.observe(el)});})();<\/script>\r\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Service\",\"name\":\"KNX RF Wireless: Retrofit Without New Cables\",\"serviceType\":\"KNX service\",\"provider\":{\"@type\":\"ProfessionalService\",\"name\":\"smartfabrik GmbH\",\"telephone\":\"+49 211 838 66 870\",\"email\":\"info@smartfabrik.de\",\"address\":{\"@type\":\"PostalAddress\",\"streetAddress\":\"Reisholzer Werftstr. 31A\",\"postalCode\":\"40589\",\"addressLocality\":\"D\u00fcsseldorf\",\"addressCountry\":\"DE\"},\"areaServed\":[\"K\u00f6ln\",\"D\u00fcsseldorf\",\"Nordrhein-Westfalen\",\"Deutschland\"]},\"description\":\"Retrofit a smart home without new cables: KNX RF is wireless in the KNX standard \u2014 for the occupied house and for rooms with no bus cable on your system.\",\"inLanguage\":\"en\"},{\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Can a smart home really be retrofitted without opening walls?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. 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If a battery runs down, nothing comes to a standstill because of it: only that one control point pauses, the switching and dimming devices are on power and carry on working. There are two ways to change it, and you decide: at a service visit, when someone is at the system anyway, or by yourself \u2014 it takes only a few simple steps, and we show you them at handover.\"}},{\"@type\":\"Question\",\"name\":\"Our house is large and solidly built \u2014 will a wireless signal reach everywhere?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"With planning: yes. Walls and ceilings weaken a wireless signal, solid building elements more than light ones. That is why we promise no range in metres but plan the coverage on your particular building: where the devices sit, which distances they have to bridge and at which point a repeater carries the signal onward. A large house over several floors can be reached this way too. If the planning shows that a place cannot be reached reliably by wireless, we tell you so \u2014 for that place the cable then remains, or a deliberate decision to do without, but not a system that only responds sometimes.\"}},{\"@type\":\"Question\",\"name\":\"What does it cost to retrofit KNX wirelessly?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For that we would have to know what is to be built \u2014 and that is exactly what we settle first, which is why no figure appears here. The scope runs from a single wireless push-button on an existing system to a whole house fitted out room by room; a flat rate would do neither case justice. After the walk-through and the list of functions the effort can be stated, not before. The invoices remain separate: planning, programming and documentation lie with us; devices and installation lie with our own electricians at elektrofabrik \u2014 our sister company \u2014 or with your own contractor. The project file and the documents are handed over to you at the end.\"}}],\"inLanguage\":\"en\"}]}<\/script>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Leistungen KNX-Service Referenzen Partner Team Kontakt DEENARBeratung &rarr; Funk im Bestand KNX Funk nachr\u00fcsten \u2014 die W\u00e4nde bleiben zu. Ein bewohntes Haus, verputzte W\u00e4nde, keine Sanierung in Sicht \u2014 und trotzdem der Wunsch, dass Licht, Rolll\u00e4den und Heizung zusammenspielen. Daf\u00fcr gibt es innerhalb des KNX-Standards einen eigenen Weg: KNX RF, den Funk im Standard. Taster&hellip; <a class=\"more-link\" href=\"https:\/\/smartfabrik.de\/en\/knx-service\/knx-rf-wireless\/\">Continue reading <span class=\"screen-reader-text\">KNX RF Wireless: Retrofit Without New Cables | smartfabrik<\/span><\/a><\/p>\n","protected":false},"author":0,"featured_media":0,"parent":10156,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_canvas","meta":{"footnotes":""},"class_list":["post-10171","page","type-page","status-publish","hentry","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>KNX RF Wireless: Retrofit Without New Cables | smartfabrik<\/title>\n<meta name=\"description\" content=\"Retrofit a smart home without new cables: KNX RF is wireless in the KNX standard \u2014 for the occupied house and for rooms with no bus cable on your system.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/smartfabrik.de\/en\/knx-service\/knx-rf-wireless\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"KNX RF Wireless: Retrofit Without New Cables | smartfabrik\" \/>\n<meta property=\"og:description\" content=\"Retrofit a smart home without new cables: KNX RF is wireless in the KNX standard \u2014 for the occupied house and for rooms with no bus cable on your system.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/smartfabrik.de\/en\/knx-service\/knx-rf-wireless\/\" \/>\n<meta property=\"og:site_name\" content=\"smartfabrik\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/smartfabrik\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-23T08:12:08+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/smartfabrik.de\/wp-content\/uploads\/2023\/10\/smartfabrik-logo-fox.png\" \/>\n\t<meta property=\"og:image:width\" content=\"355\" \/>\n\t<meta property=\"og:image:height\" content=\"379\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"11 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/smartfabrik.de\\\/en\\\/knx-service\\\/knx-rf-wireless\\\/\",\"url\":\"https:\\\/\\\/smartfabrik.de\\\/en\\\/knx-service\\\/knx-rf-wireless\\\/\",\"name\":\"KNX RF Wireless: Retrofit Without New Cables | smartfabrik\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/smartfabrik.de\\\/en\\\/#website\"},\"datePublished\":\"2026-08-20T14:06:54+00:00\",\"dateModified\":\"2026-08-23T08:12:08+00:00\",\"description\":\"Retrofit a smart home without new cables: KNX RF is wireless in the KNX standard \u2014 for the occupied house and for rooms with no bus cable on your system.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/smartfabrik.de\\\/en\\\/knx-service\\\/knx-rf-wireless\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/smartfabrik.de\\\/en\\\/knx-service\\\/knx-rf-wireless\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/smartfabrik.de\\\/en\\\/knx-service\\\/knx-rf-wireless\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home page\",\"item\":\"https:\\\/\\\/smartfabrik.de\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"KNX Service: Plan &#038; 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