Description
The Lennox 70W91 is an outdoor air sensor which is an essential component in controlling your HVAC system. It determines The outdoor temperature and relay this information to the thermostat and the system uses to regulate the heating and cooling. This sensor employs Negative Temperature Coefficient thermistor technology that implies that the electrical resistance of the device decreases with the increase in temperature. Designed to work with Lennox HVAC equipment, the 70W91 helps your system achieve the right indoor temperatures for your home while using energy efficiently.
