Air Leakage Unit Conversion Credit to Retrotec for the initial work on this calculator. Any assumptions made are listed below in the assumptions box. Inputs Enter envelope area directly (assumes square footprint for volume calculations) Enter volume area directly (assumes square footprint for area calculations) Enter floor area directly (assumes square footprint for volume and envelope area calculations) Enter length, width and height Use metric building dimensions Envelope Area Ae:m2 Volume V:m3 Total Floor Area Af:m2 Length L:m Width W:m Total Height H:m (if blank – assumes 2.74 m per floor) Number Of Floors N:(if blank – assumes single story building) Exponent n:(if blank – assumes 0.65) Air Leakage Test Result:cfm at 25Pacfm at 75Pacfm at 50Pacfm at 150Pam3/h at 50PaL/s at 50Pacfm at 50Pa per ft2 of envelope areacfm at 75Pa per ft2 of envelope areacfm at 50Pa per ft2 of floor aream3/h at 50Pa per m2 of envelope aream3/h at 75Pa per m2 of envelope aream3/h at 150Pa per m2 of envelope areaL/s at 50Pa per m2 of envelope areaL/s at 75Pa per m2 of envelope areaL/s at 150Pa per m2 of envelope areaACH50EqLA (in2 at 10Pa)EfLA (in2 at 4Pa)EfLA (in2 at 4Pa) per 100ft2 of floor areaEqLA (cm2 at 10Pa)EfLA (cm2 at 4Pa)EfLA (cm2 at 4Pa) per 100ft2 of floor area Assumption Blah Air leakage test result – converted to other units Total Flow cfm at 25Pa January cfm at 50Pa January cfm at 75Pa January cfm at 150Pa January m3/h at 50Pa January L/s at 50Pa January Permeability Rates cfm at 50Pa per ft2 of envelope area January cfm at 75Pa per ft2 of envelope area January cfm at 50Pa per ft2 of floor area January m3/h at 50Pa per m2 of envelope area January m3/h at 75Pa per m2 of envelope area January m3/h at 150Pa per m2 of envelope area January L/s at 50Pa per m2 of envelope area January L/s at 75Pa per m2 of envelope area January L/s at 150Pa per m2 of envelope area January Air changes per hour ACH50 January Size of hole ( Equivilent Leakage area) EqLA (in2 at 10Pa) January EfLA (in2 at 4Pa) January EfLA (in2 at 4Pa) per 100ft2 of floor area January EqLA (cm2 at 10Pa) January EfLA (cm2 at 4Pa) January EfLA (cm2 at 4Pa) per 100ft2 of floor area January You Might Also Like... Air Tightness Unit Converter Pressure Flow Conversion Calculator BCA Permeability Calculator How can air leakage testing help you?
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