{"product_id":"honeywell-home-dt4r-wireless-thermostat-receiver-yt42wrft20","title":"Honeywell Home DT4R Wireless Thermostat \u0026 Receiver | YT42WRFT20","description":"\u003cdiv style=\"font-family: Arial, sans-serif; color: #1e293b; line-height: 1.7;\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eHoneywell Home DT4R Wireless Room Thermostat and Receiver (YT42WRFT20)\u003c\/strong\u003e is a battery-powered heating control solution designed to provide convenient wireless room temperature regulation. Supplied with a mains-powered relay receiver, this complete thermostat pack allows the thermostat to be positioned in a suitable location without requiring a direct thermostat cable connection to the boiler or heat source.\u003c\/p\u003e\n\u003cp\u003eOperating on an encrypted 868 MHz radio frequency, the DT4R provides on\/off heating control for compatible boilers, heat pumps and zone valves. Its large LED segment display, adjustable brightness, fuzzy logic control and adjustable Eco Offset make it a practical choice for domestic heating installations.\u003c\/p\u003e\n\u003cp\u003eWith a temperature set-point range of 5°C to 35°C, built-in frost protection and compatibility with the Honeywell Home BDR91A relay box, the DT4R is suitable for new installations and selected existing wireless heating control upgrades.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0;\"\u003e\n\u003cspan style=\"background: #f1f5f9; color: #1e3a5f; padding: 7px 12px; border-radius: 20px; font-size: 13px;\"\u003eWireless 868 MHz\u003c\/span\u003e \u003cspan style=\"background: #f1f5f9; color: #1e3a5f; padding: 7px 12px; border-radius: 20px; font-size: 13px;\"\u003eOn\/Off Control\u003c\/span\u003e \u003cspan style=\"background: #f1f5f9; color: #1e3a5f; padding: 7px 12px; border-radius: 20px; font-size: 13px;\"\u003eWhite Finish\u003c\/span\u003e \u003cspan style=\"background: #f1f5f9; color: #1e3a5f; padding: 7px 12px; border-radius: 20px; font-size: 13px;\"\u003e5-Year Warranty\u003c\/span\u003e \u003cspan style=\"background: #f1f5f9; color: #1e3a5f; padding: 7px 12px; border-radius: 20px; font-size: 13px;\"\u003e2 × AA Batteries\u003c\/span\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"color: #1e3a5f;\"\u003eKey Features\u003c\/h3\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003e1. Complete Wireless Thermostat and Receiver Pack\u003c\/h4\u003e\n\u003cp\u003eSupplied with a DT4R wireless room thermostat and a 230V AC mains-powered relay receiver. The receiver connects to the heating appliance, while the thermostat communicates wirelessly, reducing the need for a thermostat cable between the two locations.\u003c\/p\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003e2. Encrypted 868 MHz Wireless Communication\u003c\/h4\u003e\n\u003cp\u003eUses an encrypted 868.0–868.6 MHz radio frequency with a typical indoor communication range of up to 30 metres in a residential building environment.\u003c\/p\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003e3. Fuzzy Logic On\/Off Temperature Control\u003c\/h4\u003e\n\u003cp\u003eFeatures fuzzy logic control with selectable cycle rates and installer-adjustable minimum on\/off times. It provides on\/off demand switching for compatible heating appliances operating with a 24–230V AC control circuit.\u003c\/p\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003e4. Clear LED Display and Adjustable Brightness\u003c\/h4\u003e\n\u003cp\u003eThe large LED segment display features adjustable brightness and status indicators for heating, cooling, wireless signal, Eco mode, off mode, low battery and warnings. The display switches off when not in use and can be activated using the wake-up button.\u003c\/p\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003e5. Eco Offset and Built-In Frost Protection\u003c\/h4\u003e\n\u003cp\u003eProvides a timed Eco Offset adjustment from -3°C to +3°C in 0.5°C steps, with a duration of 1–24 hours. The Off position maintains a 5°C frost-protection minimum to help protect the heating system against freezing conditions.\u003c\/p\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003e6. Flexible Installation and 5-Year Warranty\u003c\/h4\u003e\n\u003cp\u003eThe thermostat supports table-stand or wall-mounted installation, while the receiver can be mounted directly onto a wall or wall box. The product carries a 5-year manufacturer warranty according to the supplied specifications.\u003c\/p\u003e\n\u003ch3 style=\"color: #1e3a5f;\"\u003eAdditional Installer Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFlip-up receiver wiring platform for easier wiring access.\u003c\/li\u003e\n\u003cli\u003eReceiver status LED, manual override and reset buttons.\u003c\/li\u003e\n\u003cli\u003eInstaller settings for cycle rate, minimum on\/off time and set-point limits.\u003c\/li\u003e\n\u003cli\u003eConfigurable heating, cooling or heating and cooling operation.\u003c\/li\u003e\n\u003cli\u003eInstaller-configurable heat\/cool changeover.\u003c\/li\u003e\n\u003cli\u003eBinding and factory reset options.\u003c\/li\u003e\n\u003cli\u003eFailsafe operation: if the sensor or radio link is lost, the receiver cycles demand at 20% on and 80% off.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #1e3a5f;\"\u003eWhat's Included in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHoneywell Home DT4R white wireless room thermostat.\u003c\/li\u003e\n\u003cli\u003eWireless relay receiver (230V AC mains powered).\u003c\/li\u003e\n\u003cli\u003e2 × AA alkaline batteries for the thermostat.\u003c\/li\u003e\n\u003cli\u003eWiring plate and mounting fittings.\u003c\/li\u003e\n\u003cli\u003eInstallation literature in 14 languages, including English.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #1e3a5f;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003eGeneral Information\u003c\/h4\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eResideo (Honeywell Home)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eDT4R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eManufacturer Stock Code\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eYT42WRFT20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eEAN\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e5059085002640\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eColour\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eControl Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eOn\/off, fuzzy logic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eOperating Modes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eHeating, cooling and off\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003eThermostat Specifications\u003c\/h4\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e2 × AA alkaline batteries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eBattery Life\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eUp to 1.5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eTemperature Sensor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e10 kΩ at 25°C NTC thermistor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eSet-Point Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e5°C to 35°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eRoom Temperature Display Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e0°C to 40°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eFrost Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e5°C minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eEco Offset\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e-3°C to +3°C in 0.5°C steps, 1–24 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eLED segment display with adjustable brightness\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eDimensions (H × W × D)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e101 × 101 × 54mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e130g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003eWireless Communication\u003c\/h4\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eRF Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eISM 868.0–868.6 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eMaximum RF Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e25mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eProtocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eEncrypted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eCommunication Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eUp to 30m indoors in a residential environment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003eRelay Receiver Specifications\u003c\/h4\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e230V AC mains\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eSwitched Appliance Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e24–230V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eElectrical Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e5A resistive \/ 3A inductive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eSwitch Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eSPDT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eTerminals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eUp to 2.5mm² cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eIngress Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eIP30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e200g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003eEnvironmental and Compliance Information\u003c\/h4\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e0°C to 40°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eStorage Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e-20°C to 55°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eRelative Humidity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e10–90%, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eErP Class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eClass IV (+2%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e\u003cstrong\u003eApprovals Listed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eEMC 2014\/30\/EU, LVD 2014\/35\/EU, R\u0026amp;TTE 1995\/5\/EC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"color: #1e3a5f;\"\u003eHeating System Compatibility\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 15px 0; font-size: 14px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #1e3a5f; color: #ffffff;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #e2e8f0; text-align: left;\"\u003eApplication\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #e2e8f0; text-align: left;\"\u003eCompatibility\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #e2e8f0; text-align: left;\"\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eGas combi, system and heat-only boilers\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eYes\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eMust accept a 24–230V AC on\/off thermostat circuit.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eHeat pumps\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eYes\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eMust accept a simple on\/off demand input.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003e2-port zone valves\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eYes\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eOn\/off demand control through the receiver.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eSolid fuel boilers\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eYes\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eMust accept an external thermostat input.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eUnderfloor heating zone control\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eYes\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eOn\/off zone control for suitable heating and cooling applications.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eHoneywell Home BDR91A relay box\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eYes\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eCompatible; sold separately.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eevohome \/ HCC100 zoning\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eCheck first\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eConfirm the correct product and integration requirements before ordering.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eOpenTherm modulation\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eNo\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eThis is an on\/off model. Consider the YT43MRF series for OpenTherm.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eDirect 240V electric heating\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eNo\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eNot supported by the manufacturer for this model.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"color: #1e3a5f;\"\u003eImportant Compatibility Information\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eOn\/off control only:\u003c\/strong\u003e The YT42WRFT20 does not provide OpenTherm modulation. For compatible OpenTherm control, refer to the Honeywell Home YT43MRF modulating series.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eevohome and HCC100:\u003c\/strong\u003e The supplied compatibility information identifies the BDR91A relay box as compatible with this pack. It lists evohome, HCC100, HCE80, HCC80 and ST9000 against the separate DTS42WRFST20 spare thermostat. Contact the supplier to confirm the correct product before ordering for these systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTime control:\u003c\/strong\u003e This thermostat does not include a built-in time schedule or programmer. Separate time control may be required depending on the heating system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eElectric heating:\u003c\/strong\u003e Not suitable for direct 240V electric heating. The receiver is rated at 5A resistive and 3A inductive, and is not intended to switch a direct electric heater load.\u003c\/p\u003e\n\u003ch3 style=\"color: #1e3a5f;\"\u003eOther DT4R Range Options\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 15px 0; font-size: 14px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #1e3a5f; color: #ffffff;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #e2e8f0; text-align: left;\"\u003eColour \/ Version\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #e2e8f0; text-align: left;\"\u003ePart Code\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #e2e8f0; text-align: left;\"\u003eType\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eWhite (this product)\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eYT42WRFT20\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eOn\/off wireless pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eGrey\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eYT42GRFT21\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eOn\/off wireless pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eBlack\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eYT42BRFT22\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eOn\/off wireless pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eWhite modulating\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eYT43MRFWT30\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eOpenTherm wireless pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eGrey modulating\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eYT43MRFGT31\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eOpenTherm wireless pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eBlack modulating\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eYT43MRFBT32\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eOpenTherm wireless pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f1f5f9;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eWhite spare thermostat\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eDTS42WRFST20\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #e2e8f0;\"\u003eThermostat only, no receiver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"color: #1e3a5f;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003e1. Does the Honeywell Home DT4R YT42WRFT20 come with a receiver?\u003c\/h4\u003e\n\u003cp\u003eYes. The pack includes a wireless room thermostat and a 230V AC mains-powered relay receiver, along with two AA batteries and mounting fittings.\u003c\/p\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003e2. Can I use the DT4R with a heat pump?\u003c\/h4\u003e\n\u003cp\u003eYes, provided the heat pump accepts a simple 24–230V AC on\/off demand input. Cooling mode is also available for suitable appliances.\u003c\/p\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003e3. Will it work with evohome or an HCC100 controller?\u003c\/h4\u003e\n\u003cp\u003eCompatibility should be checked before ordering. The supplied manufacturer comparison information identifies the BDR91A relay box as compatible with this pack, while several zoning systems are listed against the separate DTS42WRFST20 thermostat.\u003c\/p\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003e4. Can I upgrade an existing Honeywell Home wireless system?\u003c\/h4\u003e\n\u003cp\u003eYes. The DT4R is backwards compatible with compatible Honeywell Home RF products, including the BDR91A relay box. The thermostat can be bound to a compatible receiver using the installer menu.\u003c\/p\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003e5. What happens if the battery or wireless signal fails?\u003c\/h4\u003e\n\u003cp\u003eThe thermostat displays a low-battery warning. If the sensor or radio link is lost, the receiver uses the specified failsafe operation, cycling demand at 20% on and 80% off.\u003c\/p\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003e6. Does the DT4R have a built-in timer or programmer?\u003c\/h4\u003e\n\u003cp\u003eNo. The YT42WRFT20 does not include a built-in time schedule. Separate time control may be needed for installations requiring programmed heating periods.\u003c\/p\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003e7. Is this thermostat suitable for direct electric heating?\u003c\/h4\u003e\n\u003cp\u003eNo. The manufacturer states that this model is not suitable for direct 240V electric heating. Its receiver is designed for compatible control circuits rather than direct electric heater loads.\u003c\/p\u003e\n\u003ch4 style=\"color: #1e3a5f;\"\u003e8. Are other colours available?\u003c\/h4\u003e\n\u003cp\u003eYes. The supplied range information lists grey and black on\/off versions, as well as white, grey and black OpenTherm modulating versions. These have different manufacturer part codes.\u003c\/p\u003e\n\u003ch3 style=\"color: #1e3a5f;\"\u003eInstallation and Safety Information\u003c\/h3\u003e\n\u003cp\u003eThe relay receiver is powered by 230V AC mains and switches compatible appliance control circuits. Isolate the electrical supply before wiring or carrying out installation work. Boiler and heat pump controls must be installed by a competent person, with gas appliance work carried out by a Gas Safe registered engineer where required. Follow BS 7671, the appliance manufacturer's instructions and applicable UK regulations.\u003c\/p\u003e\n\u003cdiv style=\"background: #f1f5f9; border-left: 4px solid #d97706; padding: 16px; margin-top: 24px; border-radius: 4px;\"\u003e\n\u003ch3 style=\"color: #1e3a5f; margin-top: 0;\"\u003eOrder Honeywell Home DT4R Wireless Thermostat from GetPlumb\u003c\/h3\u003e\n\u003cp\u003eChoose the Honeywell Home DT4R YT42WRFT20 for wireless on\/off heating control. Supplied with a mains-powered receiver, AA batteries and mounting fittings, it offers flexible control for compatible boilers, heat pumps and heating zones.\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 0;\"\u003e\u003cstrong\u003eOrder now from GetPlumb.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":53898823696720,"sku":"YT42WRFT20","price":82.46,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/honeywell-home-dt4r-wireless-thermostat-receiver-yt42wrft20-5099663.jpg?v=1793435289","url":"https:\/\/getplumb.co.uk\/fr\/products\/honeywell-home-dt4r-wireless-thermostat-receiver-yt42wrft20","provider":"Getplumb","version":"1.0","type":"link"}