Calculators and tables produced by Efficiency Matrix useful for building science professionals.
Wind speed conversion calculator
Calculation of wind speed and induced pressure can be highly beneficial for comprehending the average total pressure that could impact ...
Converting R-value Metric to Imperial Calculator
Insulation R-Value Conversions, Imperial R-value is very very different to Metric R-values. If you come across any tables in the ...
Converting permeability rate CFM/ft2 to m3/h/m2 Calculator
To convert the permeability rate from cubic feet per minute per square foot (CFM/ft²) to cubic meters per hour per ...
Building Materials Vapour Permeance Conversion Calculator
Vapor permeable and vapor barrier materials are crucial in the construction of buildings for managing moisture content and ensuring the ...
Common Building Materials Vapor Permeance Table
Vapor permeable sarking/wraps or building products on the EXTERIOR of WALLS are designed to allow water vapor to diffuse through them, ...
What Caulk should I use?
There are many different types of caulk that have Pro's and Con's for many different purposes. In this table, we ...
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 ...
What’s my actual R-value of my walls and my ceiling?
What’s my actual R-value of my walls and my ceiling? It's becoming quite widely known these days that small gaps ...
Static Pressure Limit
Static Pressure Limit If the product of the temperature differential across the building envelope (ΔT), multiplied by the building height ...
Air Leakage Unit Conversion
Credit to Retrotec for the initial work on this calculator. Any assumptions made are listed below in the assumptions box ...
R-Value, Wind, and Air flow Imperial to Metric Converter
R-Value, Wind, and Air flow Imperial to Metric Converter R-Value, Wind Speed/Pressure and permeability rate values can get really confusing ...
BCA Permeability Calculator
Inputs Building Predefined Enter Building Dimensions Building Volume (m3): Perimeter zone Volume (m3): Envelope area (m2): Length (m): Width (m): ...
Pressure Flow Conversion Calculator
Flow Inputs Input Test Pressure(Pa) Usually 150Pa: Input Leakage Rate (l/s.m2): Input Surface area (m2)(Optional): Output Permeability Pressure (Pa) Usually ...
The Blower Door Testing Calculator
Number of blower door fans needed for commercial blower door/air tightness testing. Flow Inputs Target Permeability (m3/h.m2@50pa): Envelope Area (m2): ...
Building Material R-Values
An Interesting video on common building envelope issues, in Australia. There are many websites on the internet which have Imperial ...
