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Air Leakage Unit Conversion

Air Leakage Unit Conversion

Instructions: Green cells are inputs. Grey cells are outputs. 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

Assumption

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

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