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Ventilation calculations in Heatpunk

When selecting which ventilation calculation to use, you will have the option between the Standard method, Measured air permeability (both based on BS EN 12831-1:2017) and the Legacy method based on (BS EN 12831:2003). 

Standard method 

This

and the

Measured air permeability method are based on BS EN 12831-1:2017: 

image.png 

Legacy method

MCS certification in accordance with MIS 3005-D now requires heat loss calculations comply with BS EN 12831-1:2017. Please only select this method when viewing old projects. 

This method is based on BS EN 12831:2003. This is a much simpler calculation based on the following formula: 

image.png

 

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