What size furnace for 1850 sq ft?

To determine the appropriate size furnace for an 1850 sq ft home, you'll typically need around 30-60 BTUs (British Thermal Units) per square foot, depending on factors like climate, insulation, and home layout. This means a furnace with a capacity of approximately 55,500 to 111,000 BTUs would be suitable. It's best to consult with an HVAC professional for a precise calculation tailored to your specific home conditions.