The new cello Air™ damper product solves the problem of hot and cold rooms. The cello Air™ damper continuously balances the airflow for the entire home. It is independent of the thermostat. The cello Air™ damper installs under the existing vent register implying no change to the home decor. The cello Air™ damper is battery powered with an expected life cycle of up to 6 years for regularly maintained furnaces and ACs. Solving the comfort problem results in energy savings.