Lennox 91J89 Economizer Control Board Em1-1

The Lennox 91J89 Economizer Control Board EM1-1 is an essential component for Lennox HVAC systems. This small board is responsible for managing the power consumption of the device. The 91J89 measures temperature. In case the outside air is cooler than the inside of the house, the board is intelligent enough to make the system draw this cool air. This relieves the load from your air conditioner, thus may help you save on your energy bill. The economizer control board works in harmony to help you to cool your building by using cooler outside air, thus making your HVAC system work more efficiently.