Professional Brand Two-Stage Constant Torque Gas Furnaces

Upgrade your home comfort with our Professional Brand two-stage constant torque furnaces — delivering smoother, quieter performance and better temperature control than standard single-stage systems.

These furnaces operate in low fire most of the time for energy efficiency and quiet operation, but automatically switch to high fire when outdoor temperatures drop or demand increases. Built with a constant torque ECM motor, they also offer improved airflow and energy savings on both heating and cooling modes.