These upflow/horizontal single stage burner furnaces come with a variable speed blower and operate at 80% AFUE. Meaning that 80 cents of every dollar of gas used goes into heating your home.

With a variable speed blower you can say goodbye to the "poof" and sudden rush of air when your furnace turns on. Instead you'll just notice a slow but steady increase in air flow as the unit adjusts to what your home needs.