{"product_id":"872-042","title":"872-042","description":"This premium Fan Center and Boiler Relay is an essential electrical component designed for high-efficiency control within HVAC and hydronic heating systems. Functioning as a combined transformer and relay assembly, it converts 120V line voltage to low-voltage power for thermostat circuits while providing reliable Single Pole Double Throw (SPDT) switching for fan motors, circulator pumps, and boiler systems. This versatile electrical part is engineered to streamline the interface between low-voltage controls and high-voltage equipment, ensuring smooth operation of heating and cooling cycles. Whether you are repairing a furnace air handler or a residential boiler, this heavy-duty relay ensures consistent performance and simplified wiring for climate control maintenance and upgrades.\u003cbr\u003e\nType: HVAC Relay and Transformer Assembly\u003cbr\u003e\nSize: Standard junction box mount\u003cbr\u003e\nDimensions: 4 in × 4 in\u003cbr\u003e\nApplication: Commonly used in residential boilers, furnaces, air handlers, and hydronic heating applications to manage blower fans and circulation pumps via low-voltage thermostats.\u003cbr\u003e\nSpecifications: Primary Voltage: 120V; Switching Logic: SPDT (Single Pole Double Throw); Integrated transformer for 24V control circuits; Designed for mounting on a standard 4x4 inch electrical box.","brand":"BCFurnace","offers":[{"title":"FAN CENTRE \u0026 BOILER RELAY SPDT 120V \/ 872-042","offer_id":50509972242717,"sku":null,"price":202.26,"currency_code":"CAD","in_stock":true},{"title":"FAN CENTRE \u0026 BOILER RELAY SPDT 120V \/ R8239A1052","offer_id":50509972308253,"sku":null,"price":202.26,"currency_code":"CAD","in_stock":true},{"title":"FAN CENTRE \u0026 BOILER RELAY SPDT 120V \/ R8239A1052\/U","offer_id":50509972275485,"sku":null,"price":202.26,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/653f8774f1b44f8ab0025443bb1c52ca.webp?v=1773959437","url":"https:\/\/bcfurnace.myshopify.com\/products\/872-042","provider":"BCFurnace","version":"1.0","type":"link"}