Lennox 76M31 RH Duct Sensor

The Lennox 76M31 RH Duct Sensor is an essential part of the Lennox HVAC systems. It is mounted in the return air duct and measures both relative humidity (0-95% RH) and temperature (-10°F to 160°F). According to this it is taken to the main control board of the HVAC system for comfort as well as efficiency management. This is because the sensor controls the humidity factor to an optimal level to avoid growth of mould and make the environment more comfortable.