{"product_id":"suntouch-15-amp-relay-r4-wi-fi-dual-voltage-control-relay","title":"SunTouch 15 Amp Relay R4 Wi-Fi Dual Voltage Control - Relay","description":"\u003cp\u003eOur review of the SunTouch SunStat Relay R4 finds it best suited to homeowners and installers who need reliable, high-capacity control for electric floor heating systems. The bottom line: this relay is a practical solution when a system requires more than 15 amps and the installer wants simple integration with modern SunStat thermostats and the SunStat ConnectPlus wireless ecosystem. The built-in GFCI and status indicators provide visible safety confirmation, while the dual-voltage capability and daisy-chaining option scale well for larger zones.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-voltage control:\u003c\/strong\u003e Handles both 120V and 240V systems so a single relay model fits a variety of electric floor heating installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-capacity coverage:\u003c\/strong\u003e Controls up to 150 sq. ft. at 120V or 300 sq. ft. at 240V and can be daisy-chained to manage up to 1,500 sq. ft. or 3,000 sq. ft. respectively.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWireless communication:\u003c\/strong\u003e Built-in 915MHz wireless lets the relay pair with the SunStat ConnectPlus Thermostat for Wi-Fi control via the Watts Home app and voice assistants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect thermostat wiring:\u003c\/strong\u003e Wires directly to SunStat Connect, Connect Plus, and Command thermostats for straightforward control of larger systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated safety features:\u003c\/strong\u003e Includes a built-in GFCI and status indicators to help ensure safe, reliable operation during installation and use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe Relay R4 is aimed at homeowners, electricians, and HVAC professionals installing or upgrading SunTouch electric radiant floor heating for medium to large areas where loads exceed 15 amps. It is particularly useful when remote monitoring or voice control is desired via the SunStat ConnectPlus Thermostat and Watts Home app.\u003c\/p\u003e\n\u003cp\u003eIt is not intended for older SunStat thermostats or legacy relay models, so anyone maintaining an older installation should verify compatibility or choose a relay specifically for legacy equipment instead of this model.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSupports both 120V and 240V systems, reducing the need for multiple relay types.\u003c\/li\u003e\n\u003cli\u003eCan daisy-chain up to ten relays for expansive coverage, making it ideal for large installations.\u003c\/li\u003e\n\u003cli\u003eBuilt-in GFCI and status indicators improve safety and troubleshooting during installation.\u003c\/li\u003e\n\u003cli\u003eWireless 915MHz pairing with ConnectPlus enables app and voice control for convenience.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRequires a dedicated additional 20-amp circuit and individual breaker per relay, which can increase installation cost and complexity.\u003c\/li\u003e\n\u003cli\u003eNot compatible with older model thermostats or relays, so legacy systems may need replacement components.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eDevice type\u003c\/td\u003e\n\u003ctd\u003eDual-voltage relay for electric floor heating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e120V \/ 240V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoverage\u003c\/td\u003e\n\u003ctd\u003eUp to 150 sq. ft. at 120V, 300 sq. ft. at 240V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDaisy-chain capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 10 relays (1,500 sq. ft. at 120V \/ 3,000 sq. ft. at 240V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety features\u003c\/td\u003e\n\u003ctd\u003eBuilt-in GFCI and status indicators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWireless\u003c\/td\u003e\n\u003ctd\u003e915MHz wireless compatible with SunStat ConnectPlus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermostat compatibility\u003c\/td\u003e\n\u003ctd\u003eWires to SunStat Connect, Connect Plus, Command\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe SunTouch Relay R4 is a sensible choice for modern electric floor heating projects that need more than 15 amps of control and that will pair with current SunStat thermostats. Its combination of dual-voltage support, daisy-chaining for large areas, and wireless connectivity via the ConnectPlus ecosystem deliver flexible control and good long-term value for owners and contractors willing to add the required circuits and breakers.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this relay be used with older SunStat thermostats?\u003c\/strong\u003e\u003cbr\u003eThe Relay R4 should not be used with older model thermostats or relays; it is designed for use with current SunStat Connect, Connect Plus, and Command thermostats.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much area can one relay control?\u003c\/strong\u003e\u003cbr\u003eOne relay controls up to 150 sq. ft. at 120V or 300 sq. ft. at 240V, and up to ten relays can be daisy-chained for much larger coverage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the relay support remote control and voice assistants?\u003c\/strong\u003e\u003cbr\u003eYes, when paired wirelessly with the SunStat ConnectPlus Thermostat it supports Wi-Fi control through the Watts Home app and works with Alexa and Hey Google for voice control.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":48749752484059,"sku":"B09TRXV6L5","price":133.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51M7Ew_VddL._SL1500.jpg?v=1778884807","url":"https:\/\/gearmusthave.com\/products\/suntouch-15-amp-relay-r4-wi-fi-dual-voltage-control-relay","provider":"GearMustHave","version":"1.0","type":"link"}