{"product_id":"engo-e20i-b-uk-wireless-smart-thermostat-wifi-alexa-app-control-no-hub-required-black","title":"ENGO E20i-B-UK Wireless Smart Thermostat – WiFi, Alexa \u0026 App Control, No Hub Required | Black","description":"\u003cstyle\u003e\n  .engo-desc * { box-sizing: border-box; }\n  .engo-desc { font-family: inherit; color: inherit; line-height: 1.7; font-size: 16px; }\n  .engo-desc p, .engo-desc li, .engo-desc td, .engo-desc th { font-size: 16px !important; line-height: 1.7; }\n  .engo-desc h2 { font-size: 22px !important; font-weight: 700; color: #1a1a1a; border-bottom: 2px solid #1a1a1a; padding-bottom: 6px; margin: 2rem 0 1rem; line-height: 1.3; }\n  .engo-desc h3 { font-size: 17px !important; font-weight: 700; color: #1a1a1a; margin: 1.2rem 0 0.4rem; line-height: 1.4; }\n  .engo-desc p { margin: 0 0 1rem; }\n  .engo-desc ul { padding-left: 1.5rem; margin: 0 0 1rem; }\n  .engo-desc ul li { margin-bottom: 0.5rem; }\n\n  .engo-intro-box { background: #f5f5f5; border-left: 4px solid #222; padding: 1.1rem 1.4rem; border-radius: 0 6px 6px 0; margin-bottom: 1.5rem; }\n  .engo-intro-box p { margin: 0 !important; }\n\n  .engo-badge { display: inline-block; background: #222; color: #fff; font-size: 13px !important; font-weight: 700; border-radius: 4px; padding: 2px 10px; margin-right: 6px; margin-bottom: 4px; vertical-align: middle; letter-spacing: 0.04em; }\n  .engo-badge.accent { background: #c05a00; }\n  .engo-badge.green { background: #2e7d32; }\n\n  .engo-why-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 0.85rem; margin-bottom: 1.2rem; }\n  .engo-why-card { background: #f9f9f9; border: 1px solid #ddd; border-radius: 6px; padding: 1rem 1.1rem; line-height: 1.6; }\n  .engo-why-card strong { display: block; color: #1a1a1a; margin-bottom: 0.35rem; font-size: 16px !important; }\n\n  .engo-app-box { background: #1a1a1a; color: #fff; border-radius: 8px; padding: 1.1rem 1.4rem; margin: 1.2rem 0; }\n  .engo-app-box h3 { color: #fff !important; font-size: 17px !important; margin: 0 0 0.5rem !important; }\n  .engo-app-box p { color: #e0e0e0 !important; margin: 0 !important; font-size: 16px !important; }\n  .engo-app-box ul { color: #e0e0e0; margin: 0.5rem 0 0 !important; padding-left: 1.4rem; }\n  .engo-app-box ul li { font-size: 16px !important; margin-bottom: 0.3rem; }\n\n  .engo-offline-box { background: #f0f8f0; border: 1px solid #a5d6a7; border-radius: 6px; padding: 1rem 1.3rem; margin: 1.2rem 0; }\n  .engo-offline-box h3 { margin-top: 0 !important; }\n  .engo-offline-box p { margin: 0 !important; }\n\n  .engo-spec-table { width: 100%; border-collapse: collapse; margin-bottom: 1.2rem; }\n  .engo-spec-table th { background: #222; color: #fff !important; text-align: left; padding: 0.7rem 1rem; font-weight: 600; font-size: 16px !important; }\n  .engo-spec-table td { padding: 0.6rem 1rem; border-bottom: 1px solid #e0e0e0; vertical-align: top; font-size: 16px !important; }\n  .engo-spec-table tr:nth-child(even) td { background: #f5f5f5; }\n  .engo-spec-table td:first-child { font-weight: 600; color: #1a1a1a; width: 42%; }\n\n  .engo-pills { display: flex; flex-wrap: wrap; gap: 0.55rem; margin-bottom: 1.2rem; }\n  .engo-pill { background: #f0f0f0; color: #1a1a1a; border-radius: 20px; padding: 0.35rem 1rem; font-size: 15px !important; font-weight: 500; border: 1px solid #ccc; line-height: 1.4; }\n\n  .engo-faq-item { border-bottom: 1px solid #e0e0e0; padding: 1rem 0; }\n  .engo-faq-item:last-child { border-bottom: none; }\n  .engo-faq-item p { margin: 0.4rem 0 0 !important; }\n\n  .engo-inbox-list { list-style: none !important; padding: 0 !important; margin: 0 0 1rem !important; }\n  .engo-inbox-list li { padding: 0.5rem 0 0.5rem 1.8rem !important; border-bottom: 1px solid #ebebeb; position: relative; margin-bottom: 0 !important; font-size: 16px !important; }\n  .engo-inbox-list li::before { content: \"✓\"; position: absolute; left: 0; color: #2e7d32; font-weight: 700; }\n\n  .engo-infobox { background: #fff8e6; border: 1px solid #f0d080; border-radius: 6px; padding: 1rem 1.2rem; margin-top: 1.5rem; color: #5a4a00; line-height: 1.6; font-size: 16px !important; }\n\n  @media (max-width: 600px) {\n    .engo-why-grid { grid-template-columns: 1fr; }\n    .engo-spec-table td:first-child { width: auto; }\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"engo-desc\"\u003e\n\n  \u003c!-- INTRO --\u003e\n  \u003cdiv class=\"engo-intro-box\"\u003e\n    \u003cp\u003e\n      \u003cspan class=\"engo-badge\"\u003eWiFi — No Hub Required\u003c\/span\u003e\n      \u003cspan class=\"engo-badge\"\u003e868 MHz RF Wireless\u003c\/span\u003e\n      \u003cspan class=\"engo-badge green\"\u003eWorks Offline\u003c\/span\u003e\n      \u003cspan class=\"engo-badge accent\"\u003eAlexa \u0026amp; Google\u003c\/span\u003e\n      \u003cspan class=\"engo-badge\"\u003eUK Model — Batteries Included\u003c\/span\u003e\n    \u003c\/p\u003e\n    \u003cp style=\"margin-top: 0.7rem !important;\"\u003eThe \u003cstrong\u003eENGO E20i-B-UK Wireless Smart Thermostat in Black\u003c\/strong\u003e is a hub-free Wi-Fi thermostat designed for straightforward intelligent heating control of combi boilers, system boilers, zone valves, and wiring centres. The battery-powered thermostat head communicates wirelessly to a mains-wired receiver — which contains the built-in Wi-Fi module — giving you full remote control via the \u003cstrong\u003eENGO Smart app\u003c\/strong\u003e, \u003cstrong\u003eAmazon Alexa\u003c\/strong\u003e, or \u003cstrong\u003eGoogle Assistant\u003c\/strong\u003e, without the need for a separate internet gateway. Ships factory-paired, batteries included, and ready to install.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cp\u003eUnlike many smart thermostats that require a dedicated hub or bridge, the E20i-B-UK keeps things genuinely simple: the receiver connects to your home Wi-Fi directly, and the thermostat head sits wherever it reads room temperature best — on a wall, shelf, or worktop via the included desk stand. The matt black finish suits contemporary interiors where a standard white thermostat would stand out.\u003c\/p\u003e\n\n  \u003ch2\u003eWhy Buy the ENGO E20i-B-UK?\u003c\/h2\u003e\n  \u003cdiv class=\"engo-why-grid\"\u003e\n    \u003cdiv class=\"engo-why-card\"\u003e\n\u003cstrong\u003e📶 No Hub Required\u003c\/strong\u003eThe Wi-Fi module is built into the receiver — no separate bridge, gateway, or additional hardware needed. Just your home's 2.4 GHz router.\u003c\/div\u003e\n    \u003cdiv class=\"engo-why-card\"\u003e\n\u003cstrong\u003e🖤 Matt Black Finish\u003c\/strong\u003eA discreet, modern aesthetic for contemporary interiors — pairs naturally with dark switches, sockets, and fittings.\u003c\/div\u003e\n    \u003cdiv class=\"engo-why-card\"\u003e\n\u003cstrong\u003e🔗 Factory Pre-Paired\u003c\/strong\u003eThermostat and receiver ship paired — no manual pairing procedure required straight out of the box.\u003c\/div\u003e\n    \u003cdiv class=\"engo-why-card\"\u003e\n\u003cstrong\u003e🔋 Batteries Included\u003c\/strong\u003eThe UK model ships with 2 × AA batteries — you can install immediately without a trip to the shops.\u003c\/div\u003e\n    \u003cdiv class=\"engo-why-card\"\u003e\n\u003cstrong\u003e📱 ENGO Smart App\u003c\/strong\u003eFull remote control via smartphone — set schedules, adjust temperature, check status, and share access with other household members from anywhere.\u003c\/div\u003e\n    \u003cdiv class=\"engo-why-card\"\u003e\n\u003cstrong\u003e🎙️ Alexa \u0026amp; Google Compatible\u003c\/strong\u003eVoice-activated temperature adjustment and on\/off control via Amazon Alexa and Google Assistant.\u003c\/div\u003e\n    \u003cdiv class=\"engo-why-card\"\u003e\n\u003cstrong\u003e🌐 Works Offline Too\u003c\/strong\u003eIf internet drops, the thermostat continues to operate normally — maintaining temperature and running schedules locally without cloud dependency.\u003c\/div\u003e\n    \u003cdiv class=\"engo-why-card\"\u003e\n\u003cstrong\u003e📅 7-Day Scheduling\u003c\/strong\u003eSet different heating programmes for each day of the week via the app, with multiple time\/temperature periods per day.\u003c\/div\u003e\n    \u003cdiv class=\"engo-why-card\"\u003e\n\u003cstrong\u003e🌡️ TPI or Hysteresis Control\u003c\/strong\u003eChoose Time Proportional \u0026amp; Integral (TPI) for precise, efficient performance — or switch to standard hysteresis (±0.2°C to ±2°C) via installer settings.\u003c\/div\u003e\n    \u003cdiv class=\"engo-why-card\"\u003e\n\u003cstrong\u003e❄️ Heat \u0026amp; Cool Mode\u003c\/strong\u003eSwitchable heating\/cooling output — suitable for systems with both heating and cooling capability such as fan coil units and reversible heat pumps.\u003c\/div\u003e\n    \u003cdiv class=\"engo-why-card\"\u003e\n\u003cstrong\u003e🔒 PIN \/ Child Lock\u003c\/strong\u003ePrevent accidental or unauthorised changes at the thermostat head with a configurable PIN lock.\u003c\/div\u003e\n    \u003cdiv class=\"engo-why-card\"\u003e\n\u003cstrong\u003e🧲 Desk Stand Included\u003c\/strong\u003ePlace the thermostat freely on a shelf or worktop — no wall drilling needed, useful for rented properties.\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eSuitable For\u003c\/h2\u003e\n  \u003cdiv class=\"engo-pills\"\u003e\n    \u003cspan class=\"engo-pill\"\u003eGas combi boilers\u003c\/span\u003e\n    \u003cspan class=\"engo-pill\"\u003eSystem \u0026amp; heat-only boilers\u003c\/span\u003e\n    \u003cspan class=\"engo-pill\"\u003eOil \u0026amp; LPG boilers\u003c\/span\u003e\n    \u003cspan class=\"engo-pill\"\u003eElectric boilers\u003c\/span\u003e\n    \u003cspan class=\"engo-pill\"\u003eZone valves \u0026amp; wiring centres\u003c\/span\u003e\n    \u003cspan class=\"engo-pill\"\u003eWet underfloor heating\u003c\/span\u003e\n    \u003cspan class=\"engo-pill\"\u003eFan coil units (heat\/cool)\u003c\/span\u003e\n    \u003cspan class=\"engo-pill\"\u003eReversible heat pumps\u003c\/span\u003e\n    \u003cspan class=\"engo-pill\"\u003eHoliday homes \u0026amp; rental properties\u003c\/span\u003e\n    \u003cspan class=\"engo-pill\"\u003eRetrofit smart heating upgrades\u003c\/span\u003e\n    \u003cspan class=\"engo-pill\"\u003eRented properties (no permanent wiring at stat)\u003c\/span\u003e\n    \u003cspan class=\"engo-pill\"\u003eNew-build installations\u003c\/span\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eProduct Description\u003c\/h2\u003e\n  \u003cp\u003eThe ENGO E20i-B-UK is a two-part system: a compact battery-powered \u003cstrong\u003ethermostat head\u003c\/strong\u003e (80 × 80 × 23 mm) and a \u003cstrong\u003emains-powered receiver\u003c\/strong\u003e (96 × 96 × 27 mm) that wires directly to the heating system. The receiver contains the Wi-Fi chip — connecting to your 2.4 GHz network and acting as the bridge between the ENGO Smart app and the thermostat — meaning no separate hub is required and there are no additional devices cluttering your utility room.\u003c\/p\u003e\n\n  \u003cp\u003eThe thermostat head and receiver communicate via a dedicated \u003cstrong\u003e868 MHz RF link\u003c\/strong\u003e — a frequency less prone to interference than 2.4 GHz, giving reliable wireless performance through walls and across floors. Each device uses unique transmission codes, preventing signal crosstalk with neighbouring ENGO systems in flats or terraced properties.\u003c\/p\u003e\n\n  \u003c!-- APP \/ VOICE CALLOUT --\u003e\n  \u003cdiv class=\"engo-app-box\"\u003e\n    \u003ch3\u003e📱 ENGO Smart App — Full Control From Anywhere\u003c\/h3\u003e\n    \u003cp\u003eDownload the free \u003cstrong\u003eENGO Smart app\u003c\/strong\u003e (iOS \u0026amp; Android) for the complete feature set:\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003eRemote temperature adjustment from anywhere with an internet connection\u003c\/li\u003e\n      \u003cli\u003e7-day programmable weekly schedule with multiple daily periods\u003c\/li\u003e\n      \u003cli\u003eManual override — boost heating or switch off from your phone instantly\u003c\/li\u003e\n      \u003cli\u003eShare access with family members, a letting agent, or a property manager\u003c\/li\u003e\n      \u003cli\u003eMonitor real-time room temperature and current setpoint\u003c\/li\u003e\n      \u003cli\u003eCompatible with Alexa, Google Assistant, SmartLife, and Tuya Smart (Tuya Cloud platform)\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- OFFLINE CALLOUT --\u003e\n  \u003cdiv class=\"engo-offline-box\"\u003e\n    \u003ch3\u003e✅ Works Without an Internet Connection\u003c\/h3\u003e\n    \u003cp\u003eIf your broadband drops, the E20i-B-UK continues to operate normally in offline mode — maintaining the last schedule or setpoint locally. Your heating won't turn off just because your internet is down. This makes it a reliable choice for rural properties, holiday homes, or any installation where connectivity can be intermittent.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cp\u003eThe \u003cstrong\u003eTPI (Time Proportional and Integral) control algorithm\u003c\/strong\u003e modulates the heating output based on the gap between current room temperature and the setpoint — cycling the boiler more frequently when the gap is small, and less so when it's large. This produces more stable room temperatures with less overshoot, and is particularly well-suited to underfloor heating systems where slow thermal response can cause conventional on\/off thermostats to hunt. Standard hysteresis (on\/off) control is also selectable via the installer settings (±0.2°C to ±2°C dead band), if preferred for simpler radiator systems.\u003c\/p\u003e\n\n  \u003cp\u003eThe receiver output is a \u003cstrong\u003evolt-free (dry contact) COM\/NO\u003c\/strong\u003e — compatible with virtually any heating system that uses a room thermostat signal: combi boilers, system boilers, oil and LPG boilers, zone valves, fan coil units, and wet underfloor heating manifold pump circuits. The receiver is rated at \u003cstrong\u003e16(5)A\u003c\/strong\u003e, sufficient for direct connection to most standard UK heating loads.\u003c\/p\u003e\n\n  \u003cp\u003eTemperature is adjustable between \u003cstrong\u003e5°C and 35°C\u003c\/strong\u003e in 0.5°C steps. Minimum and maximum setpoint limits are configurable via the installer settings — useful for holiday lets or landlord-managed properties where you want to cap how high or low occupants can set the heating. The large, legible backlit display shows current room temperature and target setpoint simultaneously.\u003c\/p\u003e\n\n  \u003ch2\u003eKey Features\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWi-Fi built into the receiver\u003c\/strong\u003e — no hub, bridge, or gateway required\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e868 MHz RF link\u003c\/strong\u003e between thermostat and receiver — reliable, long-range wireless\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFactory pre-paired\u003c\/strong\u003e — thermostat and receiver ready to use from the box\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e2 × AA batteries included\u003c\/strong\u003e (UK model)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eENGO Smart app\u003c\/strong\u003e control (iOS \u0026amp; Android) — Tuya Cloud platform\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAmazon Alexa, Google Assistant, SmartLife \u0026amp; Tuya Smart\u003c\/strong\u003e compatible\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOffline operation\u003c\/strong\u003e — maintains last schedule\/setpoint without internet connection\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e7-day programmable schedule\u003c\/strong\u003e with multiple periods per day\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTPI algorithm\u003c\/strong\u003e — or switchable to hysteresis (±0.2°C to ±2°C) via installer settings\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHeating \/ Cooling mode\u003c\/strong\u003e — switchable output for heat pump and fan coil compatibility\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePIN \/ child lock\u003c\/strong\u003e at the thermostat head\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eConfigurable min\/max setpoint limits\u003c\/strong\u003e — ideal for rental properties\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTemperature range: 5°C – 35°C\u003c\/strong\u003e (0.5°C display accuracy)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUnique transmission codes\u003c\/strong\u003e — prevents interference with neighbouring systems\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eThermostat: 2 × AA batteries\u003c\/strong\u003e — no wiring required at thermostat position\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eReceiver: 230V AC \/ 50Hz\u003c\/strong\u003e — volt-free COM\/NO output, 16(5)A rated\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWall-mount or desk stand\u003c\/strong\u003e — desk stand included\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMatt black finish\u003c\/strong\u003e — white version available: E20i-W-UK\u003c\/li\u003e\n    \u003cli\u003eUK \u0026amp; EU certified — compliant with UK regulations and EU Directives 2014\/53\/EU \u0026amp; 2016\/65\/EU\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003ctable class=\"engo-spec-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eModel (UK)\u003c\/td\u003e\n\u003ctd\u003eE20i-B-UK — Black\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eThermostat Power Supply\u003c\/td\u003e\n\u003ctd\u003e2 × AA batteries (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eReceiver Power Supply\u003c\/td\u003e\n\u003ctd\u003e230V AC \/ 50Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eReceiver Max Load\u003c\/td\u003e\n\u003ctd\u003e16(5)A\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eReceiver Output\u003c\/td\u003e\n\u003ctd\u003eVolt-free COM \/ NO (dry contact)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTemperature Control Range\u003c\/td\u003e\n\u003ctd\u003e5.0°C – 35.0°C\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eDisplay Temperature Accuracy\u003c\/td\u003e\n\u003ctd\u003e0.5°C\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eControl Algorithm\u003c\/td\u003e\n\u003ctd\u003eTPI — or Hysteresis (±0.2°C to ±2°C), selectable via installer settings\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eRF Communication (thermostat ↔ receiver)\u003c\/td\u003e\n\u003ctd\u003e868 MHz (unique transmission codes)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eRF Frequency Band\u003c\/td\u003e\n\u003ctd\u003e868.0–868.6 MHz (\u0026lt;13 dBm)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWi-Fi Communication (receiver ↔ router)\u003c\/td\u003e\n\u003ctd\u003e2.4 GHz Wi-Fi — 5 GHz not supported\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHub \/ Gateway Required\u003c\/td\u003e\n\u003ctd\u003eNo — Wi-Fi module built into receiver\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eApp Platform\u003c\/td\u003e\n\u003ctd\u003eENGO Smart (Tuya Cloud) — iOS \u0026amp; Android\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eVoice Assistants\u003c\/td\u003e\n\u003ctd\u003eAmazon Alexa, Google Assistant\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSmart Home Platforms\u003c\/td\u003e\n\u003ctd\u003eSmartLife, Tuya Smart\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOpenTherm Compatible\u003c\/td\u003e\n\u003ctd\u003eNo — volt-free on\/off output only\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOffline Operation\u003c\/td\u003e\n\u003ctd\u003eYes — maintains last schedule\/setpoint without internet\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHeating \/ Cooling Mode\u003c\/td\u003e\n\u003ctd\u003eYes — switchable via installer settings\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWeekly Schedule\u003c\/td\u003e\n\u003ctd\u003e7-day programmable via app\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePIN \/ Child Lock\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMin\/Max Setpoint Limit\u003c\/td\u003e\n\u003ctd\u003eConfigurable via installer settings\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eThermostat Dimensions\u003c\/td\u003e\n\u003ctd\u003e80 × 80 × 23 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eReceiver Dimensions\u003c\/td\u003e\n\u003ctd\u003e96 × 96 × 27 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eMatt Black\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMounting Options\u003c\/td\u003e\n\u003ctd\u003eWall-mount or desk stand (desk stand included)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eUK \u0026amp; EU certified — 2014\/53\/EU, 2016\/65\/EU\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch2\u003eInstallation \u0026amp; Compatibility Notes\u003c\/h2\u003e\n  \u003cp\u003eThe receiver wires to the heating system using standard room thermostat wiring (L, N, Earth, and the switched COM\/NO output). It is compatible with any heating appliance that accepts a volt-free (dry contact) room thermostat signal — including gas, oil, and LPG combi and system boilers, electric boilers, motorised zone valves, wiring centres, and wet underfloor heating pump\/actuator circuits. The receiver's volt-free output means it is safe for use with low-voltage control systems as well as mains-voltage switching applications within the 16(5)A rating.\u003c\/p\u003e\n\n  \u003cp\u003e\u003cstrong\u003eOpenTherm:\u003c\/strong\u003e The E20i-B-UK uses a standard on\/off volt-free output only — it does not support OpenTherm modulating communication. It will still control an OpenTherm-compatible boiler, but only in simple on\/off mode rather than modulating mode.\u003c\/p\u003e\n\n  \u003cp\u003eThe thermostat head is battery-powered (2 × AA batteries included) and requires no wiring — position it freely on a wall or use the desk stand. Mount it away from direct sunlight, draughts, external walls, and heat sources for the most accurate temperature reading. The 868 MHz RF link gives reliable through-wall range; for very large properties or thick stone walls, test signal strength before committing to a fixed position.\u003c\/p\u003e\n\n  \u003cp\u003eWi-Fi setup requires a \u003cstrong\u003e2.4 GHz network only\u003c\/strong\u003e — the receiver does not connect to 5 GHz. If your router broadcasts a combined 2.4\/5 GHz network under one SSID, temporarily separate the bands or connect your phone to 2.4 GHz during initial setup. All wiring of the receiver must be carried out by a \u003cstrong\u003ecompetent person\u003c\/strong\u003e in accordance with \u003cstrong\u003eBS 7671 (IET Wiring Regulations)\u003c\/strong\u003e and the heating appliance manufacturer's instructions.\u003c\/p\u003e\n\n  \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n  \u003cdiv class=\"engo-faq-item\"\u003e\n    \u003ch3\u003eDo I need a separate hub or bridge?\u003c\/h3\u003e\n    \u003cp\u003eNo. The Wi-Fi module is built directly into the receiver unit. All you need is a standard 2.4 GHz home Wi-Fi network — no ENGO gateway, bridge, or any additional hardware is required.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"engo-faq-item\"\u003e\n    \u003ch3\u003eAre batteries included?\u003c\/h3\u003e\n    \u003cp\u003eYes — the UK model (E20i-B-UK) ships with 2 × AA batteries for the thermostat head.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"engo-faq-item\"\u003e\n    \u003ch3\u003eDoes it work with OpenTherm boilers?\u003c\/h3\u003e\n    \u003cp\u003eNo — the E20i-B-UK uses a volt-free on\/off output only and does not support OpenTherm modulating communication. It will control an OpenTherm boiler, but only in simple on\/off mode, not modulating mode.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"engo-faq-item\"\u003e\n    \u003ch3\u003eWhat happens if my internet goes down?\u003c\/h3\u003e\n    \u003cp\u003eThe thermostat continues to function normally in offline mode, maintaining its last setpoint or schedule locally. Your heating will not switch off due to an internet or broadband outage.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"engo-faq-item\"\u003e\n    \u003ch3\u003eCan multiple people control it from the app?\u003c\/h3\u003e\n    \u003cp\u003eYes — the thermostat can be shared with multiple users via the ENGO Smart app, so all household members or a property manager can access and adjust it from their own devices.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"engo-faq-item\"\u003e\n    \u003ch3\u003eMy router uses a combined 2.4\/5 GHz network — will it still work?\u003c\/h3\u003e\n    \u003cp\u003eThe receiver only supports 2.4 GHz. If your router uses a single SSID for both bands, you may need to temporarily separate them (or connect your phone to the 2.4 GHz band) during the initial Wi-Fi setup. Once connected, the thermostat will work normally.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"engo-faq-item\"\u003e\n    \u003ch3\u003eWhat is TPI control and do I need it?\u003c\/h3\u003e\n    \u003cp\u003eTPI (Time Proportional and Integral) modulates the boiler's duty cycle based on how far the room is from the target temperature — producing more stable, efficient heating than simple on\/off switching. It is particularly beneficial for underfloor heating systems with slow thermal response. Standard hysteresis mode (±0.2°C to ±2°C dead band) is also available via the installer settings if preferred.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"engo-faq-item\"\u003e\n    \u003ch3\u003eCan it be used in a rental property?\u003c\/h3\u003e\n    \u003cp\u003eYes — the desk stand means the thermostat head doesn't need to be permanently wall-mounted. The receiver requires permanent wiring to the boiler (a one-time installation). Once installed, access can be shared with tenants, and the configurable min\/max setpoint limits let landlords set boundaries on how far the temperature can be adjusted.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"engo-faq-item\"\u003e\n    \u003ch3\u003eDoes the white version have the same features?\u003c\/h3\u003e\n    \u003cp\u003eYes — the \u003cstrong\u003eENGO E20i-W-UK\u003c\/strong\u003e (white) is identical in specification and features. The only difference is the colour of the thermostat head and receiver fascia.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n  \u003cul class=\"engo-inbox-list\"\u003e\n    \u003cli\u003eENGO E20i-B-UK thermostat head (matt black) — pre-paired to receiver\u003c\/li\u003e\n    \u003cli\u003eE20i receiver \/ Wi-Fi module — for wiring to heating system\u003c\/li\u003e\n    \u003cli\u003e2 × AA batteries (for thermostat head)\u003c\/li\u003e\n    \u003cli\u003eDesk stand for thermostat head\u003c\/li\u003e\n    \u003cli\u003eWall-mounting screws and fixings for both units\u003c\/li\u003e\n    \u003cli\u003eQuick start guide (multilingual, English included)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cdiv class=\"engo-infobox\"\u003e\n    \u003cstrong\u003e⚠️ Please Note:\u003c\/strong\u003e Wiring of the receiver to the heating appliance must be carried out by a competent person in accordance with BS 7671 (IET Wiring Regulations) and the appliance manufacturer's instructions. Requires a 2.4 GHz Wi-Fi network — 5 GHz not supported. This product does not support OpenTherm modulating communication — volt-free on\/off output only. Also available in white: \u003cstrong\u003eENGO E20i-W-UK\u003c\/strong\u003e.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"ENGO Controls","offers":[{"title":"Default Title","offer_id":63494155632989,"sku":"E20I-B-UK","price":67.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/ENGOE20i-BWirelessSmartThermostat-Black.webp?v=1771486643","url":"https:\/\/qualityheating.co.uk\/products\/engo-e20i-b-uk-wireless-smart-thermostat-wifi-alexa-app-control-no-hub-required-black","provider":"AIZO Quality Heating","version":"1.0","type":"link"}