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Ruud
75K BTU Gas Furnace
Ruud 80% AFUE, Upflow/Horizontal, Constant-Torque ECM, 3.5 Ton Airflow, 17.5" Cabinet | R801T0754A17UHSNA
$1,697.99
A 75,000 BTU gas furnace suits mid-to-large homes, and at this size the blower's airflow becomes as important as the burner. Because the same blower moves air for your air conditioner, matching its CFM to the cooling system is what keeps both heating and cooling running right.
4 products
Ruud
Ruud 80% AFUE, Upflow/Horizontal, Constant-Torque ECM, 3.5 Ton Airflow, 17.5" Cabinet | R801T0754A17UHSNA
Ruud
Ruud 80% AFUE, Upflow/Horizontal, Constant-Torque ECM, 4 Ton Airflow, 21" Cabinet | R801T0754A21UHSNA
Ruud
Ruud 80% AFUE, Upflow/Horizontal, Variable-Speed ECM, 4 Ton Airflow, 17.5" Cabinet | R801V0754A17UHSCA
Ruud
Ruud 80% AFUE, Upflow/Horizontal, Variable-Speed ECM, 5 Ton Airflow, 21" Cabinet | R801V0755A21UHSCA
A furnace isn't just a heater — its blower is the air mover for the whole system, including cooling. Each ton of air conditioning needs roughly 350–450 CFM of airflow, so the furnace has to be able to deliver enough for your AC and coil. Pick a furnace whose blower covers your cooling tonnage, and a variable-speed blower will run more quietly and efficiently across both seasons.
Matching a 75,000 BTU furnace to your AC and coil? Tell us the tonnage and we'll help →
The furnace blower moves the air for both heating and air conditioning. If it can't supply enough airflow for your AC — roughly 350–450 CFM per ton — cooling capacity and comfort suffer, so the blower must match your cooling tonnage.
Mid-to-large homes with a moderate heating load, confirmed by a load calculation for your climate and insulation.
A variable-speed blower runs quieter, holds steadier airflow, and uses less electricity across heating and cooling. It costs more but improves comfort and efficiency, especially in larger homes.
Choose a furnace whose blower can deliver the airflow your AC tonnage needs, and pair it with a compatible coil. An undersized blower chokes the cooling system regardless of the AC's capacity.