This valve is rated for a maximum operating pressure differential of 25 PSI for air and fuel gas

What is the purpose of the 4-8"wc spring range

By managing the 24V signals from the thermostat to high-voltage blower outputs

the Carrier HH18HA435 is the official successor and direct replacement for the 1176115 switch

Lennox 17F52 Collector Box 320788-703 This valve is rated forThe Lennox 17F52 Collector Box is a critical OEM component designed for high efficiency condensing gas furnaces, specifically within the Lennox SLP98 and ML195 series. As a veteran technician knows, the collector box (also referred to as a cold end header box kit) is the primary interface for managing acidic condensate before it enters the trap. This specific furnace collector box replacement is engineered to withstand the corrosive nature of