this specific model is designed for 3-point floating (open/stop/close) signals

Designed for seamless compatibility with high-efficiency units from Lochinvar and A

you must manually depress the red reset button to restore power to the heating circuit

and 20462204

making it a versatile OEM replacement filter drier for your service truck

Tjernlund Products HS3 Power Venters 320788-704 this specific model is designedThe Tjernlund HS3 Side Wall Vent System is a high performance power venter engineered for gas fired furnaces, boilers, and water heaters. Designed to provide positive mechanical draft where natural draft venting is restricted, this sidewall venter eliminates the need for vertical chimneys. The HS3 utilizes a stainless steel construction and high temperature motor to withstand flue gas temperatures while maintaining consistent static pressure. As a gas