Marketing InformationUsed for side wall venting residential/light commercial natural gas, LP or oil fired equipment including: Furnaces, boilers, water heaters and unit heaters. All models feature the new UC1 universal control and a diaphragm fan proving switch safety interlock which will shut down the heating equipment if a venting malfunction occurs. Built-in adjustable damper also allows regulation for maximum combustion efficiency. UC1 universal control features include, adjustable pre and post-purge settings, LED status/diagnostic indicators, fan prover switch monitoring. Interlocks with any 24 - 120 VAC burner control circuit and also includes dry contact actuation option. Easily interlock multiple appliances with our MAC-series multiple appliance controls.