This dual-window thermostat cover is essential for maintaining the integrity of pneumatic control systems that utilize high-volume output thermostats for automatic changeover between direct and reverse actions

The Lennox 59K21 Control Board is a fundamental integrated ignition control module designed for high-performance residential gas furnaces

Reliable Performance: Delivers consistent reverse acting pneumatic control with an operating pressure of 20 psig and a maximum limit of 30 psig

It serves as a low-temperature lockout switch

Precise Detection: Specifically designed as a bulb style #19 to interface correctly with cycling pilot gas valves

Belimo B280 Ball Valve THPU32HP7Y This dual-window thermostat cover isThe Belimo B280 is a high performance 3 inch NPT 2 way characterised control valve designed for demanding hydronic applications in commercial HVAC systems. Engineer for precision, this 170 Cv ball valve features a nickel plated forged brass body paired with a stainless steel ball and stem, ensuring long term durability and resistance to scaling in both chilled water and hot water systems. The integrated equal percentage flow characteristic is achieved