F7 and G4 filters do different jobs in an MVHR system. This practical guide explains what each filter catches, where it is normally used, how it affects airflow, and when an F7 upgrade is worth considering.
Learn how to read Supply Air, Extract Air, Supply / Extract, AIRFLOW, THIS SIDE UP, F7 and ISO 16890 markings on ventilation filters and install them correctly.
A practical 7-step guide to replacing ventilation unit, MVHR and AHU filters safely: supply and extract positions, airflow arrows, cleaning and timer reset.
Learn how ventilation air filters remove dust, pollen, PM10, PM2.5 and PM1 particles. Discover how to choose the right filter for better indoor air quality and healthier living.
Learn why ventilation filters should be replaced regularly, how often to change MVHR filters, and how dirty filters affect airflow, energy use and indoor air quality.
