{"product_id":"honeywell-home-dt4-grey-wired-room-thermostat","title":"Honeywell Home DT4 Grey Wired Room Thermostat","description":"\u003cdiv class=\"product-description\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eHoneywell Home DT4 Grey Wired Room Thermostat DT40GT21\u003c\/strong\u003e is a contemporary digital thermostat for accurate room temperature control in homes and apartments. With its slim modern design, large clear LED segment display, and energy-efficient auto-off technology, it combines style with simple, intuitive operation.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnergy-efficient LED display\u003c\/strong\u003e automatically turns off when not in use to conserve battery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBacklit captive touch buttons\u003c\/strong\u003e for easy operation in any lighting conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated eco-mode\u003c\/strong\u003e provides timed temperature offset for energy savings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuzzy Logic control algorithm\u003c\/strong\u003e optimises boiler operation for precise temperature maintenance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide system compatibility\u003c\/strong\u003e including heat pumps, zoning, underfloor heating, and zone valves.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrost protection\u003c\/strong\u003e maintains minimum 5 °C setpoint when system is off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Choose Honeywell Home DT4 Grey?\u003c\/h2\u003e\n\u003cp\u003eStylish grey finish complements modern interiors while delivering proven Honeywell reliability and advanced energy-saving functions in a user-friendly package.\u003c\/p\u003e\n\u003cp\u003eErP Class IV (+2%) rating ensures compliance with current heating control efficiency regulations.\u003c\/p\u003e\n\u003ch2\u003eSuitable For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas boilers, combi boilers, and heat pumps\u003c\/strong\u003e (24-230 V on\/off control).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZone valve applications\u003c\/strong\u003e and multi-zone heating systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew installations and thermostat replacements\u003c\/strong\u003e requiring wired controls.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: \u003cstrong\u003eHoneywell Home by Resideo\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eModel: \u003cstrong\u003eDT4 Grey Wired Room Thermostat\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eMPN: \u003cstrong\u003eDT40GT21\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eGTIN: \u003cstrong\u003e5059085002626\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eControl Type: \u003cstrong\u003eOn\/Off (24-230 V)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePower Supply: \u003cstrong\u003e2 x AA batteries (included)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBattery Life: \u003cstrong\u003eApprox. 3.5 years\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSet Point Range: \u003cstrong\u003e5 °C to 35 °C\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDisplay Range: \u003cstrong\u003e0 °C to 40 °C\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSensor: \u003cstrong\u003e10k NTC thermistor @ 25 °C\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSwitching Capacity: \u003cstrong\u003e3 A resistive, 1 A inductive\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSwitch Type: \u003cstrong\u003eSPDT\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eErP Class: \u003cstrong\u003eClass IV (+2 %)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDimensions: \u003cstrong\u003e101 x 101 x 23 mm (HxWxD)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eWeight: \u003cstrong\u003e105 g\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eTerminal Size: \u003cstrong\u003eMax 2.5 mm²\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eOperating Temperature: \u003cstrong\u003e0 °C to 40 °C\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eWarranty: \u003cstrong\u003e2 years\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation \u0026amp; Operation\u003c\/h2\u003e\n\u003cp\u003eSimple wall-mounted wired installation featuring flip-up wiring platform. User menu configures heating\/cooling modes, eco offset timing, and frost protection. Installer menu enables cycle rate adjustment, setpoint limits, and commissioning settings.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":62799322251613,"sku":"DT40GT21","price":33.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/dt40gt21-honeywell-dt4-grey-wired.jpg?v=1764918628","url":"https:\/\/qualityheating.co.uk\/products\/honeywell-home-dt4-grey-wired-room-thermostat","provider":"AIZO Quality Heating","version":"1.0","type":"link"}