Itho Daalderop HRU ECO 150/200 Filters

HRU and WPU units use the same M5/F7 filtration convention, since the heat pump integration in WPU systems affects runtime rather than the filter grade required. The main practical difference is that WPU filters may need checking slightly earlier, given the additional runtime hours from continuous ventilation.

Itho Daalderop filters typically ship within a few business days to addresses across the Netherlands. Given how common HRU and WPU installations are in Dutch new-build housing, we keep standard filter classes for both series in stock to avoid delays.

The ventilation filters themselves are maintained independently of the heat pump function, but because WPU systems run ventilation continuously to support both heating and air quality, filters in combined units can see slightly more runtime hours per year than stand-alone MVHR units — worth checking on the shorter end of the 3–6 month range.

HRU units typically use an M5 filter on the extract side and an F7 (ePM1) filter on the supply side, matching Dutch building regulation recommendations for balanced ventilation systems. Both grades are available in original and house brand versions.

We stock filters for Itho Daalderop's two most popular series:

• HRU — the standalone balanced ventilation range
• WPU — ventilation integrated with a heat pump system

Both are widely installed across Dutch new-build housing, and the model code is generally printed on a sticker inside the unit's front cover.