Concord 5 Ton Gas Furnace, Single Stage, 21" Width, Upflow/Horizontal, 110,000 BTU. Anti-vibration blower assembly eliminates loud startup and shutdown noises for peaceful, quiet operation. Robust aluminized steel heat exchanger is crimped, not welded, for increased durability and safety when burners are ignited. Powerful single-stage motor delivers years of dependable comfort and helps reduce heating costs compared to older, less efficient furnaces.