{"product_id":"weil-mclain-381-800-445","title":"Weil McLain 381-800-445 Damper Assembly","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain\u003c\/strong\u003e \u003cstrong\u003e381-800-445\u003c\/strong\u003e \u003cstrong\u003eVent Damper Assembly\u003c\/strong\u003e is the \u003cstrong\u003e9-inch\u003c\/strong\u003e diameter \u003cstrong\u003eautomatic vent damper\u003c\/strong\u003e with \u003cstrong\u003ewiring harness\u003c\/strong\u003e for \u003cstrong\u003eWeil-McLain\u003c\/strong\u003e \u003cstrong\u003egas boilers\u003c\/strong\u003e. \u003cstrong\u003eWeil-McLain\u003c\/strong\u003e's \u003cstrong\u003eEG\u003c\/strong\u003e and \u003cstrong\u003eEGH\u003c\/strong\u003e \u003cstrong\u003eboiler\u003c\/strong\u003e manual lists the \u003cstrong\u003e381-800-445\u003c\/strong\u003e as the \u003cstrong\u003e9-inch\u003c\/strong\u003e \u003cstrong\u003edamper\u003c\/strong\u003e for the \u003cstrong\u003eEGH-85\u003c\/strong\u003e, and it is supplied as a complete assembly with the \u003cstrong\u003edamper motor\u003c\/strong\u003e \u003cstrong\u003e510-512-337\u003c\/strong\u003e and the \u003cstrong\u003edamper\u003c\/strong\u003e \u003cstrong\u003ewiring harness\u003c\/strong\u003e \u003cstrong\u003e591-391-795\u003c\/strong\u003e. If you are searching for \u003cstrong\u003e381-800-445\u003c\/strong\u003e, this is the factory part.\u003c\/p\u003e\n\n\u003cp\u003eAn \u003cstrong\u003eautomatic vent damper\u003c\/strong\u003e closes the \u003cstrong\u003eflue\u003c\/strong\u003e while the burner is off, which stops warm room air from chasing up the \u003cstrong\u003echimney\u003c\/strong\u003e, and opens fully before the burner is allowed to fire. The \u003cstrong\u003eactuator\u003c\/strong\u003e, a \u003cstrong\u003eJohnson M35BE-1C\u003c\/strong\u003e also sold as the \u003cstrong\u003e510-512-337\u003c\/strong\u003e, drives the \u003cstrong\u003eblade\u003c\/strong\u003e, and the \u003cstrong\u003eharness\u003c\/strong\u003e connects the \u003cstrong\u003edamper\u003c\/strong\u003e to the \u003cstrong\u003eboiler control\u003c\/strong\u003e. \u003cstrong\u003eWeil-McLain\u003c\/strong\u003e's manual is blunt about it: only the dampers it lists are approved for these boilers, the \u003cstrong\u003eblade\u003c\/strong\u003e position indicator must be visible, the \u003cstrong\u003eharness\u003c\/strong\u003e has to be \u003cstrong\u003estrain relieved\u003c\/strong\u003e and kept off hot surfaces, and a \u003cstrong\u003edamper\u003c\/strong\u003e must never be jumpered. Once the \u003cstrong\u003eboiler\u003c\/strong\u003e has run, unplugging either end of the \u003cstrong\u003eharness\u003c\/strong\u003e causes a safety lockout until it is reconnected.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWeil-McLain\u003c\/strong\u003e sizes its dampers by \u003cstrong\u003eflue\u003c\/strong\u003e diameter. The \u003cstrong\u003e381-800-445\u003c\/strong\u003e is the \u003cstrong\u003e9-inch\u003c\/strong\u003e size, the \u003cstrong\u003e381-800-446\u003c\/strong\u003e is the 10-inch size for the \u003cstrong\u003eEGH-95\u003c\/strong\u003e and \u003cstrong\u003eEGH-105\u003c\/strong\u003e, and the \u003cstrong\u003e381-800-447\u003c\/strong\u003e is the 12-inch size for the \u003cstrong\u003eEGH-115\u003c\/strong\u003e and \u003cstrong\u003eEGH-125\u003c\/strong\u003e. Do not buy by looks. Measure the \u003cstrong\u003eflue collar\u003c\/strong\u003e, check the \u003cstrong\u003eboiler\u003c\/strong\u003e model on the \u003cstrong\u003erating plate\u003c\/strong\u003e, and match both to the part number. Our team will confirm the match if you send the \u003cstrong\u003eboiler\u003c\/strong\u003e model and serial number.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eComplete Assembly:\u003c\/strong\u003e The \u003cstrong\u003e381-800-445\u003c\/strong\u003e includes the \u003cstrong\u003edamper motor\u003c\/strong\u003e \u003cstrong\u003e510-512-337\u003c\/strong\u003e and the \u003cstrong\u003ewiring harness\u003c\/strong\u003e \u003cstrong\u003e591-391-795\u003c\/strong\u003e, so you are not hunting for the \u003cstrong\u003eactuator\u003c\/strong\u003e and \u003cstrong\u003eharness\u003c\/strong\u003e separately.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eListed For The EGH-85:\u003c\/strong\u003e \u003cstrong\u003eWeil-McLain\u003c\/strong\u003e's \u003cstrong\u003eEG\u003c\/strong\u003e and \u003cstrong\u003eEGH\u003c\/strong\u003e manual lists the \u003cstrong\u003e9-inch\u003c\/strong\u003e \u003cstrong\u003edamper\u003c\/strong\u003e \u003cstrong\u003e381-800-445\u003c\/strong\u003e for the \u003cstrong\u003eEGH-85\u003c\/strong\u003e, so you are working from the manufacturer's own table.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStops Standby Heat Loss:\u003c\/strong\u003e The \u003cstrong\u003edamper\u003c\/strong\u003e closes the \u003cstrong\u003eflue\u003c\/strong\u003e between cycles, which keeps heat in the \u003cstrong\u003eboiler\u003c\/strong\u003e room and in the house instead of up the \u003cstrong\u003echimney\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSafety Interlock Built In:\u003c\/strong\u003e The \u003cstrong\u003eharness\u003c\/strong\u003e ties the \u003cstrong\u003edamper\u003c\/strong\u003e into the \u003cstrong\u003eboiler control\u003c\/strong\u003e, and \u003cstrong\u003eWeil-McLain\u003c\/strong\u003e warns that a \u003cstrong\u003event damper\u003c\/strong\u003e must never be jumpered or bypassed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhat is the Weil McLain 381-800-445?\u003c\/strong\u003e It is the \u003cstrong\u003e9-inch\u003c\/strong\u003e \u003cstrong\u003event damper\u003c\/strong\u003e assembly with \u003cstrong\u003ewiring harness\u003c\/strong\u003e. It includes the \u003cstrong\u003edamper motor\u003c\/strong\u003e \u003cstrong\u003e510-512-337\u003c\/strong\u003e and the \u003cstrong\u003eharness\u003c\/strong\u003e \u003cstrong\u003e591-391-795\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhich boiler does the 381-800-445 go on?\u003c\/strong\u003e \u003cstrong\u003eWeil-McLain\u003c\/strong\u003e's \u003cstrong\u003eEG\u003c\/strong\u003e and \u003cstrong\u003eEGH\u003c\/strong\u003e manual lists it as the \u003cstrong\u003e9-inch\u003c\/strong\u003e \u003cstrong\u003edamper\u003c\/strong\u003e for the \u003cstrong\u003eEGH-85\u003c\/strong\u003e. Check your \u003cstrong\u003eboiler\u003c\/strong\u003e model on the \u003cstrong\u003erating plate\u003c\/strong\u003e and measure the \u003cstrong\u003eflue collar\u003c\/strong\u003e. Send us the model and serial number and we will confirm before you buy.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCan I use a different brand of damper?\u003c\/strong\u003e \u003cstrong\u003eWeil-McLain\u003c\/strong\u003e states that only the dampers listed in its manual are approved for these boilers. Use the listed part number, and never jumper or bypass a \u003cstrong\u003event damper\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":67972740645042,"sku":"381-800-445","price":913.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/381-800-445.jpg?v=1794341956","url":"https:\/\/www.gsistore.com\/en-ca\/products\/weil-mclain-381-800-445","provider":"GSIstore","version":"1.0","type":"link"}