Honeywell At150F1022 is an advanced, adjustable-speed fan speed control designed to provide energy savings and comfort control in residential HVACHVAC systems. It features an intuitive user interface that makes it easy to set up and adjust. With this high-performance fan speed control, you can maintain optimal comfort while decreasing energy costs. The device works with both variable and single-stage furnaces and air conditioners, allowing you to increase system efficiency without sacrificing any of the benefits associated with a higher level of comfort. Honeywell At150F1022 provides maximum convenience and flexibility for HVAC system design, installation, and maintenance.