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Filter Grades (G3, G4, M5)

Filters are the most important part of a home ventilation system. They determine the cleansing process and filter out the particles and dust particles. This way the unit can work at its best.

But which filter grade should you select?

Most of our filters can be purchased at different density grades. The higher the grade number, the higher the quality of the cloth, producing a better performance and filtering a greater amount of nasty things from the air.

We've created this handy table below to show how each filter grade performs in filtering different particles from the air.

MVHR filter grades guide table