Enhanced Durability: Industrial-grade construction with a brass bulb ensures resistance to mineral buildup and system contaminants

technicians should also inspect for a restricted flue

This selector is designed to interface seamlessly with Maxitrol amplifiers and must be paired with a matching TS114F discharge air sensor to ensure system calibration and prevent temperature droop

or M9220 units

Durable Construction: Heavy-pattern rough bronze valve body resists corrosion and maintains structural integrity under thermal stress

Williams 1403822 Direct Vent Furnace Refrigerant Enhanced Durability: Industrial-grade construction withThe Williams 1403822 Direct Vent Furnace is a high efficiency natural gas wall heater designed for compact residential and commercial heating applications. Delivering 14,000 BTU hr, this unit is the engineered direct replacement for the 1403612, ensuring seamless HVAC retrofit compatibility with existing venting configurations. Utilizing a sealed combustion system, this direct vent heater draws combustion air from outdoors, making it ideal for