25" impeller is factory-trimmed to match the specific flow-head requirements of Raypak heat exchangers

Factory-installed 12A49 vent limiter allows for safe indoor mounting without separate vent lines

This valve is rated for a 4-ton capacity

Superior Air Handling: Equipped with a thermostatic cage unit that automatically discharges air at steam temperature to prevent air binding

low-resistance electrical connections between the common

Lochinvar & A.O. Smith 100287156 Sensor Freon 25" impeller is factory-trimmed toEnsure your high efficiency condensing boiler or water heater maintains optimal operation with the Lochinvar & A. O. Smith 100287156 Flue Temp Sensor Kit. This genuine OEM flue temperature sensor is engineered to provide precise thermal feedback to the integrated control board, preventing hazardous heat buildup and potential heat exchanger damage. Designed for a broad range of Lochinvar Knight and A. O. Smith Cyclone models, this thermistor based