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Reduced Air Infiltration: Significantly mitigates cold air backdrafts during boiler or furnace off-cycles
Designed to handle natural gas
It is the standard replacement for most units requiring a 7/8" base valve
providing immediate visual confirmation of the damper blade position: green indicates a fully open state
Fenwal 35-655605-011 Control Freon Reduced Air Infiltration: Significantly mitigatesThe Fenwal 35 655605 011 is a robust 24V Hot Surface Ignition (HSI) control module engineered for high precision gas fired appliance management. Built on a microprocessor based platform, this unit manages the complete ignition sequence, including a 0 second pre purge, 15 second inter purge (15IP), and a 5 second Trial for Ignition (TFI). Designed for three distinct tries for ignition (3TRY), it ensures reliable burner performance in furnaces, boilers,
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