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Why is the Class FT insulation rating important
The Marley Engineered Products 5813-2010-000 Thermostat is a heavy-duty
Contractor Grade: Durable construction designed to withstand the high-cycle demands of residential HVAC systems
including the D and E series bubblers
Lennox 18K44 Limit Switch Els PW 17895 Why is the Class FTThe Lennox 18K44 Limit Switch is a high reliability OEM replacement normally closed safety control designed for precise thermal management in residential gas furnaces and air handlers. This auto reset limit switch is engineered to maintain system integrity by monitoring internal plenum temperatures. It is calibrated to an open on rise (cut out) setpoint of 280F to prevent thermal overload and a close on fall (cut in) setpoint of 250F for automatic