{"product_id":"drayton-wiser-smart-radiator-thermostat-head-white-open-window-detection-m30-1-5mm-danfoss-ra","title":"Drayton Wiser Smart Radiator Thermostat TRV Head White | Open Window Detection | M30×1.5mm + Danfoss RA","description":"\u003cstyle\u003e\n  .wd-desc * { box-sizing: border-box; }\n  .wd-desc { font-family: inherit; color: inherit; line-height: 1.7; font-size: 16px; }\n  .wd-desc p, .wd-desc li, .wd-desc td, .wd-desc th { font-size: 16px !important; line-height: 1.7; }\n  .wd-desc h2 { font-size: 22px !important; font-weight: 700; color: #1a2a3a; border-bottom: 3px solid #f07b00; padding-bottom: 6px; margin: 2rem 0 1rem; line-height: 1.3; }\n  .wd-desc h3 { font-size: 17px !important; font-weight: 700; color: #1a2a3a; margin: 1.2rem 0 0.4rem; line-height: 1.4; }\n  .wd-desc p { margin: 0 0 1rem; }\n  .wd-desc ul { padding-left: 1.5rem; margin: 0 0 1rem; }\n  .wd-desc ul li { margin-bottom: 0.5rem; }\n\n  \/* brand palette: Drayton \/ Wiser orange + dark navy *\/\n  .wd-badge { display: inline-block; 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}\n\n  @media (max-width: 600px) {\n    .wd-grid { grid-template-columns: 1fr; }\n    .wd-mode-grid { grid-template-columns: 1fr 1fr; }\n    .wd-box-grid { grid-template-columns: 1fr 1fr; }\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"wd-desc\"\u003e\n\n  \u003cdiv class=\"wd-intro-box\"\u003e\n    \u003cp\u003e\n      \u003cspan class=\"wd-badge orange\"\u003eWiser Smart TRV Head\u003c\/span\u003e\n      \u003cspan class=\"wd-badge navy\"\u003eZigbee Wireless\u003c\/span\u003e\n      \u003cspan class=\"wd-badge teal\"\u003eRoom-by-Room Control\u003c\/span\u003e\n    \u003c\/p\u003e\n    \u003cp style=\"margin-top: 0.75rem !important;\"\u003eThe \u003cstrong\u003eDrayton Wiser Smart Radiator Thermostat (WV704R0A0902)\u003c\/strong\u003e is a battery-powered smart TRV head that adds individual room-by-room temperature and scheduling control to an existing Drayton Wiser heating system. It mounts directly onto most standard radiator valves — replacing the existing TRV head without tools or wiring — and communicates wirelessly via \u003cstrong\u003eZigbee\u003c\/strong\u003e to the Wiser Heat Hub. From the Wiser Heat App (iOS and Android) or via voice commands (Amazon Alexa, Google Assistant), you can set independent daily and weekly schedules for every room, boost individual radiators for 30 minutes to 3 hours, and monitor energy use. The multiple onboard sensors enable \u003cstrong\u003eOpen Window Detection\u003c\/strong\u003e — automatically cutting the heat if a sudden temperature drop is detected — while \u003cstrong\u003eautomatic valve protection\u003c\/strong\u003e periodically exercises the valve mechanism to prevent limescale seizure. Certified to ErP Class A+1 and contributing a +5% ErP improvement rating, the thermostat supports Wiser's Eco Mode, Away Mode and Comfort Mode for intelligent, low-waste heating across the whole home. \u003cstrong\u003eA Wiser Heat Hub (sold separately) must already be installed\u003c\/strong\u003e to use this device.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"wd-stat-bar\"\u003e\n    \u003cdiv class=\"wd-stat\"\u003e\n\u003cdiv class=\"num\"\u003e0–45°C\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eTemperature Range\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"wd-stat\"\u003e\n\u003cdiv class=\"num\"\u003e16\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eRooms \/ Zones\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"wd-stat\"\u003e\n\u003cdiv class=\"num\"\u003e32\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eMax Radiators\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"wd-stat\"\u003e\n\u003cdiv class=\"num\"\u003e+5%\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eErP Rating\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"wd-stat\"\u003e\n\u003cdiv class=\"num\"\u003e~18%\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eEnergy Saving (typical)\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"wd-stat\"\u003e\n\u003cdiv class=\"num\"\u003e2 yr\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eGuarantee\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"wd-award-banner\"\u003e\n    \u003cdiv class=\"star\"\u003e🏆\u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cstrong\u003eRed Dot Award — Product Design 2018\u003c\/strong\u003e\n      \u003cp\u003eRecognised internationally for outstanding design quality, the Wiser Radiator Thermostat won the prestigious Red Dot Award for its distinctive twist-top interface, compact form and clean aesthetic — inspired by the iconic Drayton TRV4 but reimagined as a modern smart device.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eKey Features\u003c\/h2\u003e\n  \u003cdiv class=\"wd-grid\"\u003e\n    \u003cdiv class=\"wd-card\"\u003e\n\u003cstrong\u003e🌡️ Multi-Sensor Precision Temperature Control — 0 to 45°C\u003c\/strong\u003eMultiple integrated temperature sensors provide highly accurate room temperature measurement, minimising the temperature swing typical of single-sensor TRVs. The thermostat controls water flow through the radiator to maintain the target temperature precisely. The full 0–45°C range covers everything from frost protection (typically set at 5°C) through sleeping temperatures to maximum warmth for a cold bathroom.\u003c\/div\u003e\n    \u003cdiv class=\"wd-card\"\u003e\n\u003cstrong\u003e📱 App-Based Room Scheduling via Wiser Heat App\u003c\/strong\u003eEach radiator thermostat can be assigned to a named room within the Wiser app and given its own fully independent daily or weekly heating schedule. Set different temperatures for morning, daytime, evening and overnight in every room — so bedrooms can cool down while the living room stays warm, or a child's nursery maintains a constant temperature regardless of the rest of the house. The app works on your home Wi-Fi network without internet access; remote access from outside the home requires an internet connection.\u003c\/div\u003e\n    \u003cdiv class=\"wd-card\"\u003e\n\u003cstrong\u003e🔄 Twist-Top Boost Interface with Spring-Back\u003c\/strong\u003eThe distinctive twist-top lets anyone in the room boost the temperature without needing the app. Twist it up to increase the setpoint, twist it down to reduce it, or activate a timed boost. When released, the top springs back to its neutral position — providing tactile confirmation of the adjustment while keeping the design clean and unobtrusive. This physical boost function is particularly useful for guests or family members who don't use the app.\u003c\/div\u003e\n    \u003cdiv class=\"wd-card\"\u003e\n\u003cstrong\u003e🪟 Open Window Detection\u003c\/strong\u003eWhen a window is opened, the room temperature typically drops rapidly. The Wiser TRV's multiple sensors detect this sudden temperature fall and automatically shut the radiator valve to prevent heating a room with a window open — eliminating the common energy waste of running the boiler while cold outside air pours in. The heating resumes automatically once the temperature stabilises after the window is closed.\u003c\/div\u003e\n    \u003cdiv class=\"wd-card\"\u003e\n\u003cstrong\u003e🔒 Device Lock — Child \u0026amp; Tamper Protection\u003c\/strong\u003eActivate the Device Lock feature via the app to prevent the physical controls from being changed at the thermostat. Ideal for households with young children who might otherwise play with the twist-top, or for shared properties and offices where you want to prevent local overrides. Temperature setpoints and schedules can still be managed from the app.\u003c\/div\u003e\n    \u003cdiv class=\"wd-card\"\u003e\n\u003cstrong\u003e⚙️ Automatic Valve Protection — Anti-Limescale\u003c\/strong\u003eThe Wiser TRV periodically runs an automatic valve exercise cycle, moving the pin mechanism even when the valve has been in one position for a prolonged period. This prevents the common issue of limescale seizing the valve in an open or closed position — a leading cause of radiators that won't shut off or won't heat up — protecting both the thermostat and the valve body itself from long-term damage.\u003c\/div\u003e\n    \u003cdiv class=\"wd-card\"\u003e\n\u003cstrong\u003e🔵 Zigbee Wireless — Mesh Network via Wiser Heat Hub\u003c\/strong\u003eThe thermostat communicates via the Zigbee wireless protocol to the Wiser Heat Hub, which acts as the system coordinator. Zigbee devices form a self-healing mesh network — each device can relay signals from others, extending the network's range and resilience. No hub or bridge is required at each radiator; one Wiser Heat Hub supports the full system of up to 32 radiator thermostats in up to 16 rooms.\u003c\/div\u003e\n    \u003cdiv class=\"wd-card\"\u003e\n\u003cstrong\u003e🎙️ Voice Control — Alexa, Google Assistant \u0026amp; IFTTT\u003c\/strong\u003eWorks natively with Amazon Alexa and Google Assistant for voice commands such as \"Alexa, set the living room to 21 degrees\" or \"OK Google, boost the kitchen heating.\" IFTTT integration enables advanced automation, including geofencing — so Away Mode can activate automatically when your smartphone leaves the home area, without any manual intervention.\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eSmart Heating Modes\u003c\/h2\u003e\n  \u003cdiv class=\"wd-mode-grid\"\u003e\n    \u003cdiv class=\"wd-mode-card eco\"\u003e\n      \u003cspan class=\"ico\"\u003e🌿\u003c\/span\u003e\n      \u003cstrong\u003eEco Mode\u003c\/strong\u003e\n      \u003cp\u003eReduces heating to a lower background temperature when rooms are unlikely to be occupied, reducing boiler running time and energy waste without letting the home get cold.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"wd-mode-card away\"\u003e\n      \u003cspan class=\"ico\"\u003e✈️\u003c\/span\u003e\n      \u003cstrong\u003eAway Mode\u003c\/strong\u003e\n      \u003cp\u003eOverrides all schedules and drops setpoints to a low frost-protection temperature when you leave home. Can activate automatically via geofencing through IFTTT. Saves up to 14% energy.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"wd-mode-card comfort\"\u003e\n      \u003cspan class=\"ico\"\u003e🏠\u003c\/span\u003e\n      \u003cstrong\u003eComfort Mode\u003c\/strong\u003e\n      \u003cp\u003ePredictive pre-heating — the system learns how long your home takes to warm up and starts the boiler early enough that rooms reach the target temperature exactly when you need them, not after.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"wd-mode-card boost\"\u003e\n      \u003cspan class=\"ico\"\u003e⚡\u003c\/span\u003e\n      \u003cstrong\u003eBoost\u003c\/strong\u003e\n      \u003cp\u003eActivate a 30-minute to 3-hour boost on any individual radiator from the twist-top or the app — useful when a room is colder than expected or guests arrive unexpectedly in an unheated room.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eInstallation — Fits Most UK Radiator Valves\u003c\/h2\u003e\n  \u003cp\u003eThe Wiser TRV head fits directly onto the valve body on your radiator — no plumber or electrician required. Simply unscrew the existing TRV head and screw on the Wiser head using the ring nut provided. Adapters for the two most common UK valve types are included in the box:\u003c\/p\u003e\n  \u003cdiv class=\"wd-compat-box\"\u003e\n    \u003cp\u003e✅ Compatible valve connections (adapters included):\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eM30 × 1.5mm\u003c\/strong\u003e — the standard thread used on the majority of UK radiator valves, including Drayton, Honeywell, Pegler, IMI and most own-brand plumbing supplies valves\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eDanfoss RA\u003c\/strong\u003e — the most common alternative in UK installations, widely fitted from the 1980s onwards; a dedicated Danfoss RA adapter is included in every box\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cdiv class=\"warn\"\u003e⚠️ \u003cstrong\u003eRequires a Wiser Heat Hub:\u003c\/strong\u003e This thermostat head is an add-on accessory. It only operates when paired with an existing Wiser Heat Hub (sold separately as part of any Drayton Wiser Kit). It cannot function as a standalone device or with any other smart heating system. \u003cbr\u003e\u003cbr\u003e⚠️ \u003cstrong\u003eNot compatible with:\u003c\/strong\u003e Gravity-fed central heating systems, or boilers that require manufacturer-specific proprietary controls to operate. If in doubt, check with your heating engineer before purchasing.\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n  \u003cdiv class=\"wd-box-grid\"\u003e\n    \u003cdiv class=\"wd-box-item\"\u003e\n\u003cspan class=\"qty\"\u003e1×\u003c\/span\u003eWiser Smart Radiator Thermostat head (white)\u003c\/div\u003e\n    \u003cdiv class=\"wd-box-item\"\u003e\n\u003cspan class=\"qty\"\u003e2×\u003c\/span\u003eAA alkaline batteries (included — no additional purchase required)\u003c\/div\u003e\n    \u003cdiv class=\"wd-box-item\"\u003e\n\u003cspan class=\"qty\"\u003e1×\u003c\/span\u003eM30 × 1.5mm ring nut (standard UK valve thread)\u003c\/div\u003e\n    \u003cdiv class=\"wd-box-item\"\u003e\n\u003cspan class=\"qty\"\u003e1×\u003c\/span\u003eDrayton valve adapter\u003c\/div\u003e\n    \u003cdiv class=\"wd-box-item\"\u003e\n\u003cspan class=\"qty\"\u003e1×\u003c\/span\u003eDanfoss RA valve adapter\u003c\/div\u003e\n    \u003cdiv class=\"wd-box-item\"\u003e\n\u003cspan class=\"qty\"\u003e1×\u003c\/span\u003eQuick start \/ installation guide\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003ctable class=\"wd-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 class=\"sec-head\"\u003e\u003ctd colspan=\"2\"\u003eProduct Identity\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eModel number (MPN)\u003c\/td\u003e\n\u003ctd\u003eWV704R0A0902\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eEAN\u003c\/td\u003e\n\u003ctd\u003e5016254201723\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eWhite (anthracite variant: WV704R0A0901)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBrand \/ Manufacturer\u003c\/td\u003e\n\u003ctd\u003eDrayton \/ Schneider Electric Industries\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eRange\u003c\/td\u003e\n\u003ctd\u003eWiser\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eDesign award\u003c\/td\u003e\n\u003ctd\u003eRed Dot Award — Product Design 2018\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\n      \u003ctr class=\"sec-head\"\u003e\u003ctd colspan=\"2\"\u003ePerformance\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTemperature control range\u003c\/td\u003e\n\u003ctd\u003e0°C to 45°C\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eErP contribution\u003c\/td\u003e\n\u003ctd\u003e+5% (Class A+1 certified)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTypical energy saving\u003c\/td\u003e\n\u003ctd\u003eUp to 18% with room-by-room zoning; Away Mode up to 14%\u003c\/td\u003e\n\u003c\/tr\u003e\n\n      \u003ctr class=\"sec-head\"\u003e\u003ctd colspan=\"2\"\u003eWireless \u0026amp; Connectivity\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWireless protocol\u003c\/td\u003e\n\u003ctd\u003eZigbee (EndDevice — mesh via Wiser Heat Hub)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eRequired hub\u003c\/td\u003e\n\u003ctd\u003eWiser Heat Hub (sold separately — included in all Wiser Kits)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eWiser Heat App — iOS and Android\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eApp local \/ remote\u003c\/td\u003e\n\u003ctd\u003eLocal control works without internet; remote access requires internet\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\u003eAutomation platform\u003c\/td\u003e\n\u003ctd\u003eIFTTT (supports geofencing for Away Mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n      \u003ctr class=\"sec-head\"\u003e\u003ctd colspan=\"2\"\u003eSystem Capacity\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMax radiator thermostats per system\u003c\/td\u003e\n\u003ctd\u003e32\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMax zones \/ rooms per system\u003c\/td\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMin radiator thermostats to start\u003c\/td\u003e\n\u003ctd\u003e2 (any Wiser Multi-zone Kit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n      \u003ctr class=\"sec-head\"\u003e\u003ctd colspan=\"2\"\u003eFeatures\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHeating modes\u003c\/td\u003e\n\u003ctd\u003eEco Mode, Away Mode (geofencing via IFTTT), Comfort Mode (predictive pre-heat), Boost (30 min – 3 hours)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOpen Window Detection\u003c\/td\u003e\n\u003ctd\u003eYes — automatic valve closure on rapid temperature drop\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eDevice Lock\u003c\/td\u003e\n\u003ctd\u003eYes — prevents physical adjustment; configurable via app\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eValve protection\u003c\/td\u003e\n\u003ctd\u003eYes — automatic periodic valve exercise to prevent limescale seizure\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eManual override\u003c\/td\u003e\n\u003ctd\u003eYes — twist-top with spring-back\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eLED indicator\u003c\/td\u003e\n\u003c\/tr\u003e\n\n      \u003ctr class=\"sec-head\"\u003e\u003ctd colspan=\"2\"\u003ePower\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBattery type\u003c\/td\u003e\n\u003ctd\u003e2 × AA alkaline\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBatteries included\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMains wiring required\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\n      \u003ctr class=\"sec-head\"\u003e\u003ctd colspan=\"2\"\u003ePhysical\u003c\/td\u003e\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e51mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e93mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eValve compatibility\u003c\/td\u003e\n\u003ctd\u003eM30 × 1.5mm (standard UK), Danfoss RA (adapter included)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFits % of UK radiator valves\u003c\/td\u003e\n\u003ctd\u003e~90%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdiv class=\"wd-faq-item\"\u003e\n    \u003ch3\u003eDo I need to buy anything else to use this?\u003c\/h3\u003e\n    \u003cp\u003eYes. The WV704R0A0902 is an add-on device — it only works as part of an existing Drayton Wiser smart heating system. You must already have a Wiser Heat Hub installed and commissioned. The Hub is included in all Drayton Wiser Kits (available in single-zone and multi-zone versions for combination and system boilers). If you're starting from scratch, you need a Wiser Kit first; if you already have a Wiser system, this thermostat can be added to it at any time.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"wd-faq-item\"\u003e\n    \u003ch3\u003eHow many of these do I need?\u003c\/h3\u003e\n    \u003cp\u003eFor maximum energy saving and comfort, Drayton recommends one thermostat per radiator. However, most people prioritise the rooms they use most — fitting a thermostat in the living room, main bedroom, kitchen and bathroom first, then expanding over time. A single Wiser system supports up to 32 radiator thermostats across up to 16 rooms, so you can grow the system gradually and add more thermostats whenever you like.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"wd-faq-item\"\u003e\n    \u003ch3\u003eCan I install this myself?\u003c\/h3\u003e\n    \u003cp\u003eYes — no tools or wiring are needed. Unscrew the existing TRV head anticlockwise from the valve body, then screw the Wiser head on using the supplied ring nut. Use the Danfoss RA adapter if your valve requires it. Then open the Wiser app to add the new device to your system. Drayton suggests the installation takes around 5 minutes per radiator. If you are unsure about your valve type, a qualified heating engineer can confirm compatibility.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"wd-faq-item\"\u003e\n    \u003ch3\u003eWill it work with my boiler?\u003c\/h3\u003e\n    \u003cp\u003eThe Wiser system is compatible with all common UK boiler types, including combination boilers, system boilers and heat-only (regular) boilers. It is not compatible with gravity-fed central heating systems (found in some older properties where the header tank is in the loft), or with boilers that require their own manufacturer-specific controls to function. If you are unsure, check with your heating engineer. The Wiser Heat Hub installation guide also lists confirmed compatible boiler types.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"wd-faq-item\"\u003e\n    \u003ch3\u003eCan I use voice control to set individual room temperatures?\u003c\/h3\u003e\n    \u003cp\u003eYes. Once connected to Amazon Alexa or Google Assistant via the Wiser skill\/action, you can control individual rooms by name — for example, \"Alexa, set the bedroom to 18 degrees\" or \"OK Google, boost the living room heating.\" The Wiser app also lets you group rooms so you can control multiple zones at once with a single voice command.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"wd-faq-item\"\u003e\n    \u003ch3\u003eHow does Open Window Detection work?\u003c\/h3\u003e\n    \u003cp\u003eThe thermostat's multiple onboard sensors continuously monitor the room temperature. When a window or external door is opened, cold air causes a rapid fall in measured temperature. The Wiser TRV detects this sudden drop and automatically closes the valve to stop heating the room — preventing energy waste from heating a room with a window open. Once the temperature stabilises (indicating the window has been closed), normal heating resumes automatically. No user intervention is needed.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"wd-faq-item\"\u003e\n    \u003ch3\u003eIs it compatible with Home Assistant or Zigbee2MQTT?\u003c\/h3\u003e\n    \u003cp\u003eThe WV704R0A0902 uses standard Zigbee and has community-verified support in Zigbee2MQTT (device model \"iTRV\", manufacturer \"Schneider Electric\"). It can be integrated into Home Assistant and similar platforms by pairing it directly with a Zigbee coordinator rather than the Wiser Hub. Note that operating it outside the Wiser ecosystem means the Wiser app features (Comfort Mode, Away Mode, etc.) are not available — you would configure the thermostat behaviour entirely within your chosen home automation platform. This is an advanced configuration not supported by Drayton.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"wd-infobox\"\u003e\n    \u003cstrong\u003eℹ️ Build your Wiser system — often purchased with:\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eWiser Multi-zone Kit 1\u003c\/strong\u003e — starter kit (Heat Hub + room thermostat + 2 × radiator TRVs) for combination boilers ·\n    \u003cstrong\u003eWiser Multi-zone Kit 2\u003c\/strong\u003e — starter kit for system\/heat-only boilers ·\n    \u003cstrong\u003eWV704R0A0901\u003c\/strong\u003e — this thermostat in Anthracite ·\n    \u003cstrong\u003eWiser Smart Room Thermostat\u003c\/strong\u003e — provides room thermostat control for a zone without a radiator TRV ·\n    \u003cstrong\u003eWiser Smart Plug\u003c\/strong\u003e — extends Wiser control to electric heaters, towel rails or other heating appliances\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Drayton Controls","offers":[{"title":"Default Title","offer_id":63583550308701,"sku":"WV704R0A0902","price":47.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/DraytonWiserSmartRadiatorThermostatHead.jpg?v=1771927427","url":"https:\/\/qualityheating.co.uk\/products\/drayton-wiser-smart-radiator-thermostat-head-white-open-window-detection-m30-1-5mm-danfoss-ra","provider":"AIZO Quality Heating","version":"1.0","type":"link"}