Ensy InoVent AHU-300 HH/HV filters

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 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.

Yes. In-stock Ensy filters are dispatched within 24 to 48 hours and typically arrive anywhere in Belgium in about 4 to 5 business days, with free delivery from €100. Ensy is a Norwegian brand and less common here than the Dutch and German makes, so it is worth confirming your model before ordering; after that, ordering as soon as your controller or calendar reminder flags a change avoids any gap in filtration.

In colder Nordic climates, MVHR systems tend to run longer heat-recovery cycles through winter, which can mean steadier — though not necessarily faster — filter loading. We still recommend the standard 3–6 month check, adjusted earlier if you notice reduced airflow or a stronger indoor odour during heating season.

Yes. Ordering several sets at once gives you a bulk discount and means the next set is already at home when the 3–6 month change comes round. It is especially practical for holiday homes or rental properties where nobody checks the unit regularly — set a calendar reminder each time you fit a set.

You can fall back on the general guidance, which points the same way as the manual will. Ensy recommends checking every 3 to 6 months, and Flemish maintenance guidance for a system D installation says much the same: check filters every 3 to 6 months and replace them at least twice a year, with the unit itself serviced every 1 to 2 years. On top of that, replace sooner if the control panel prompts you, if the air at the supply vents feels weaker, or if the filter has gone evenly grey. To order, read the model from the type plate — AHU 300 and similar — or measure the old filters in millimetres and send us the dimensions.