Itho Daalderop HRU ECO 350 Filters

We stock original filter sets for the Itho Daalderop HRU ECO range — HRU ECO 150/200 and HRU ECO 350 — one of the most widely installed balanced ventilation units in Dutch new-build housing. The model code is usually printed on a sticker inside the unit's front cover.

For each HRU ECO size, including the HRU ECO 350, we stock two original sets:

• G4+G4 — coarse filters on both sides, the standard option
• F7+F7 — fine F7 (ePM1) filters that also catch pollen and fine dust

The F7 set is the better choice for allergy sufferers or homes near busy roads.

The filter indicator on HRU ECO units is a maintenance reminder. Check the filters, fit a new set if they are dirty — which they usually are after 3–6 months — and reset the indicator as described in your manual. Resetting it without changing the filters only postpones the reminder while airflow keeps dropping.

Yes. All the Itho Daalderop filter sets we stock are originals for the HRU ECO 150/200 and HRU ECO 350, available as G4+G4 or F7+F7, so the size and filter class match what the unit was supplied with. Ordering two or more sets at once gives you a bulk discount, which makes it easy to keep a spare set at home.

To order the correct filters, knowing just the series name (HRU ECO) isn't enough — you need the full model code:

• Open the front cover — the code is usually shown on a sticker next to the filter compartment
• Check your installation documents or purchase invoice
• If you can't find the code, measure the old filter (length, width, thickness) and compare it with the dimensions in our catalogue

The exact code ensures the new filter fits snugly into the housing and doesn't let unfiltered air leak in around the edges. Note that the HRU ECO 150 and 200 share one filter size, while the HRU ECO 350 takes a different set.