MVHR Calculator program to help you size your system

An informative and reliable MVHR calculator program is freely available for designers to support project planning. The program provides site-specific technical values and helps in selecting the right ventilation unit size for each project.  

The calculation program has been implemented by W. Zenner Oy, an engineering company that carries out FINAS-accredited laboratory measurements of our products.

The calculation program covers all Airfi MVHR models. You will need Microsoft Excel to use it