Wisdom & Associates, Inc. - CFM50 Air Leakage Cost Estimator Based on Nationwide Communities

Air Leakage Cost Estimator		Fuel Type	Cost per Unit	Cost per Therm
Cost per therm of heating fuel		Natural Gas -per CCF

Cost per BTU of heating fuel		Oil - per gallon

Estimated CFM50		Electricity - Per KWH

Climate Factor		Propane - Per Gallon

Estimated CFM Natural Air Leakage

Estimated CFM of air leakage over 1 year

Average Indoor Temperature

Community
Average Temperature

AFUE of Heating Appliance

Average difference between inside and outside temperature

Pounds of Air Leakage over 1 year

BTU required to raise 1 year of air leakage 1 degree

BTU required to raise 1 year of air leakage average temperature difference between inside and outside

Total BTU adjusted for AFUE

Estimated Cost of Air Leakage

Retrofit Airsealing
Man Hours on Site

Hourly Costs

Materials

Total Cost of Retrofit

CFM50 Reduction

Yearly Savings

Payback Period (Years)

CFM per hour reduction needed


Select Your City:
City	Yearly Average
	Temp. (ºF)