Hoffman 74 Air VentThe Hoffman 74 Air Vent is a thermostatic float air vent designed for boiler water lines. It automatically vents trapped air to improve efficiency, optimize heat transfer, and prevent noisy operation in hot water or steam systems. Best suited for boiler feed lines, the unit supports inlet sizes of 1 2 inch and 3 4 inch, with flexible inlet connections available as female threaded and male threaded straight shank fittings. The non adjustable port

vibration-minimized mounting for reliable operation

it delivers reliable shut-off and fast response with a 1 inch threaded port connection

The Heil Quaker/ICP 1320368 Gas Furnace Auxiliary Limit Switch is a rugged

contributing to overall comfort in the home or business

reliable performance for single-stage heat-only applications

and safe startup

and easy retrofit within existing control enclosures

180-second delay to prevent short cycling

making it a straightforward replacement for standard Armstrong appliances

and a Cv of 5

Upgrade with confidence using this circuit board X-13 replacement to extend the life of your Carrier system and maintain optimal comfort

and it includes an auxiliary switch for expanded control options