Ensy MVHR filters

Ensy is a Norwegian ventilation manufacturer. We stock filter sets for its InoVent AHU range — AHU-200H/V, 300BH/BV, 300HH/HV, 350BH/BV, 400BH/BV, 400HH/HV and 700BH/BV. The model label is usually near the service hatch or filter compartment; if it isn't legible, measure your current filters to find the correct replacement.

The Ensy InoVent AHU filter sets we stock are F7+F7 — a fine F7 (ePM1) filter on both the supply and extract side. That gives strong protection against fine dust and pollen and keeps the heat exchanger clean.

Ensy MVHR user manuals are usually available on the manufacturer's website by specific model (e.g. the AHU 300 ceiling or floor-standing variant), and they specify the recommended filter check interval as well as what the control panel indicator means when it reminds you to change the filter. If you can't find the manual, or it's not in Estonian, follow the general rule of thumb – check the filters every 3 months and replace them sooner if you notice weaker airflow or increased noise.

The usual recommendation is to check Ensy filters every 3–6 months, and to replace them when the control panel shows a warning or you notice weaker airflow or a stronger smell indoors. During the cold season, when the MVHR unit works harder to recover heat, the filters can clog somewhat faster, so it's worth checking them earlier than your usual schedule in winter. For summer houses or rooms visited only occasionally, it's convenient to order several sets at once – multi-set orders come at a lower price – so the next set is already at hand.

Compatible Ensy filters are made to the same F7 filtration class and identical dimensions as the originals, so air cleaning efficiency and fit remain the same. The difference is essentially just price – original Ensy-branded filters are usually more expensive due to packaging and distribution through official dealers, while a compatible alternative lets you save money, especially if you replace filters several times a year. The main thing is to check that the alternative matches the exact dimensions and class for your specific AHU model.

Broadly yes. Ensy units are designed for Nordic conditions, and Estonia's climate is similar enough that the manufacturer's 3–6 month interval is a good starting point. Cold Estonian winters mean the unit runs continuously to recover heat, and outdoor air in the heating season carries more soot and fine particles, so filters usually clog faster between November and March than in summer. Check the filters every 3 months in winter and replace them as soon as airflow weakens or the control panel shows a filter reminder.