Calculators

Inputs Building Predefined Enter Building Dimensions Building Volume (m3): Perimeter zone Volume (m3): Envelope area (m2): Length (m): Width (m): Floor to Floor height (m): Number of floors: Total design...

Flow Inputs Input Test Pressure(Pa) Usually 150Pa: Input Leakage Rate (l/s.m2): Input Surface area (m2)(Optional): Output Permeability Pressure (Pa) Usually 50Pa or 75Pa (Standard AS/NZS 9972 or USACE pressure output):...

Number of blower door fans needed for commercial blower door/air tightness testing. Flow Inputs Target Permeability (m3/h.m2@50pa): Envelope Area (m2): What is the building envelope, click here to find out....

An Interesting video on common building envelope issues, in Australia. There are many websites on the internet which have Imperial Building Material R-value numbers, but not so many with Metric R-value…