Furnace Size Calculator
How to determine the correct furnace size for your home.
Furnace size is measured using the amount of heat it produces expressed in in BTU, which is short for British Thermal Unit.
The size of the furnace depends on the size and type of your home: bungalow, single, semi-detached or townhome. It also depends on whether it was built before or after the year1980 as the regulations and standards have changed since then.
You can use the from below to determine the optimal furnace size for your home:
Enter the information about your home:
Recommended BTU:?
Recommended Furnaces with 40K BTU Capacity
Amana Gas Furnace, AM9C960403BN, 40,000 BTU
Rheem Two-Stage Furnace R96VT0402317MSA 42,000 BTU (Installed)
Rheem Two-Stage Furnace R96VA0402317MSA 42,000 BTU (Installed)
Goodman, Gas Furnace, GM9C960403AN 40,000BTU
Recommended Furnaces with 60K BTU Capacity
Goodman, Gas Furnace, GM9C960603BN, 60,000 BTU
Amana Gas Furnace, Two-Stage 60K BTU (Including Installation*)
Rheem Two-Stage Furnace R96TA0602317MSA 60,000 BTU (Installed)
Rheem Two-Stage Furnace R96TA0702317MSA 70,000 BTU (Installed)
Rheem Two-Stage Furnace R96VA0702317MSA 70,000 BTU (Installed)
Rheem Two-Stage Furnace R96VA0602317MSA 60,000 BTU (Installed)
Modulating, Furnace 60K BTU AMVM970603BN 98 % AFUE (Including Installation*)
Recommended Furnaces with 80K BTU Capacity:
Amana Gas Furnace, Two-Stage 80K BTU (Including Installation*)
Amana Gas Furnace, Two-Stage 80K BTU (Including Installation*)
Rheem Two-Stage Furnace R96TA0852521MSB 85,000 BTU (Installed)
Rheem Two-Stage Furnace R96VA0852521MSB 85,000 BTU (Installed)
Modulating, Furnace 80K BTU AMVM970804CN 98 % AFUE(Including Installation*)
Goodman Gas Furnace, GM9C960804CN, 80,000 BTU
Goodman, Gas Furnace, GM9C960803BN, 80,000 BTU
Recommended Furnaces with 100K BTU Capacity
Amana Gas Furnace, Two-Stage 100K BTU (Including Installation*)
Rheem Two-Stage Furnace R96TA1002521MSA 100,000 BTU (Installed)
Rheem Two-Stage Furnace R96TA1152521MSA 115,000 BTU (Installed)
Rheem Two-Stage Furnace R96VA1002521MSA 100,000 BTU (Installed)
Rheem Two-Stage Furnace R96VA1152521MSA 115,000 BTU (Installed)
Modulating, Furnace 100K BTU AMVM971005CN 98 % AFUE (Including Installation*)
Goodman Gas Furnace, GM9C961005CN, 100,000 BTU
Goodman Gas Furnace 100K BTU, GMEC961004CN
Recommended furnaces with 120K BTU capacity
Goodman, Gas Furnace, GM9C961205DN, 120,000 BTU
Amana Gas Furnace, Two-Stage 120K BTU (Including Installation*)
