Efficiency Matrix

Efficiency Matrix Webshop

Air Tightness Unit Converter

A calculator to understand the difference between permeability leakage rates and ACH@50Pa leakage rates, while at the same time understanding other permeability rate units and size of hole, using different exponents for context.

Inputs
Building
Target Leakage Performance
Air leakage test result – converted to other units
Total Flow (of envelope area) Min 0.5 Mean 0.65 Max 0.95
cfm at 50Pa ft2 0.0 0.0 0.0
cfm at 75Pa ft2 0.0 0.0 0.0
cfm at 150Pa ft2 0.0 0.0 0.0
m3/h at 50Pa m2 0.0 0.0 0.0
m3/h at 75Pa m2 0.0 0.0 0.0
m3/h at 150Pa m2 0.0 0.0 0.0
L/s at 50Pa per m2 0.0 0.0 0.0
L/s at 75Pa per m2 0.0 0.0 0.0
L/s at 150Pa per m2 0.0 0.0 0.0
Air changes per hour
ACH50 0.0 0.0 0.0
Size of hole ( Equivalent Leakage area)
EqLA (in2 at 10Pa) 0.0 0.0 0.0
EqLA (cm2 at 10Pa) 0.0 0.0 0.0
ELA (in2 at 4Pa) 0.0 0.0 0.0
ELA (cm2 at 4Pa) 0.0 0.0 0.0

You Might Also Like...

Air Tightess conversionAir Leakage Unit Conversion Wind Effect DiagramR-Value, Wind, and Air flow Imperial to Metric Converter Whole Building Blower Door test DiagramThe Blower Door Testing Calculator building air tightnessCommercial Enclosure Air Tightness Testing Volume vs Surface Area Targets