Currently unavailableThe factory choice
G4/G4 filter set (ISO Coarse)
- 2 × ISO Coarse 75 % · G4
Two ISO Coarse 75% filters (formerly G4): one for supply air, one for extract air. The factory configuration of most units.

Compatible filters
2 filters · 200 × 415 × 48 mm · galvanised steel frame · G4 or F7
The Lemmens / Swegon HRmural Up 450 uses 2 filters of 200 × 415 × 48 mm, galvanised steel frame (Extract air, Supply air (fresh)). Our sets match these dimensions in ISO Coarse 75% (G4) and ISO ePM1 65% (F7). Compatible filters, not original parts, made in the European Union.
From €36.50incl. 21% VAT
Choose your setA set contains every filter of the unit. Prices incl. 21% VAT.
Currently unavailableThe factory choice
Two ISO Coarse 75% filters (formerly G4): one for supply air, one for extract air. The factory configuration of most units.
Currently unavailableRecommended against pollen
One ISO ePM1 65% filter (formerly F7) on the supply side, to stop pollen and fine particles, and one ISO Coarse 75% (G4) on the extract side.
Currently unavailableFine filtration on both sides
Two ISO ePM1 65% filters (formerly F7). Fine filtration on both sides; higher pressure drop, only for units that accept it.
Compatible filters, not original parts. Brand and model names are used solely to identify the units concerned.
Each set delivers every filter of the unit, ready to fit.
| Position | Quantity | Dimensions | Frame |
|---|---|---|---|
| Extract air | 1 | 200 × 415 × 48 mm | galvanised steel |
| Supply air (fresh) | 1 | 200 × 415 × 48 mm | galvanised steel |
Both classes exist for this model. The G4/F7 set combines them.
| ISO Coarse 75% (G4) | ISO ePM1 65% (F7) | |
|---|---|---|
| Stops | Dust, insects, lint | Pollen, fine particles, soot |
| Position | Extract and supply air | Supply air, intake side |
| For whom | The unit's standard configuration | Allergies, city, busy road |
| Lifetime | 6 months | 6 months, watch it more closely |
Every six months in most homes, more often near a road, during building work or with pets. A grey, bulging or smelly filter needs replacing without waiting for the date.
Switch off the power
Turn the unit off or cut the breaker before opening the hatch.
Open the filter hatch
Remove the old filters and note their direction: an arrow or label shows the air inlet side.
Slide in the new filters
The F7 goes on the supply side, the G4 on the extract side. The frame must sit flat, without play.
Reset the indicator
Close up, switch back on and reset the filter reminder on the controller, if there is one.
These models take an identical filter shape.
No. They are compatible filters, made to the dimensions of the HRmural Up 450 filter (200 × 415 × 48 mm) and to the stated filter class, by a European ventilation filter manufacturer.
G4/G4 is the standard configuration: a fine coarse filter on each side. G4/F7 puts a fine filter (ISO ePM1 65%) on the supply air, useful against pollen and fine particles, and keeps the G4 on the extract. The F7 loads faster: keep an eye on it.
Compare the dimensions on this page, 200 × 415 × 48 mm, and the frame type with your current filter. If in doubt, write to us with a photo of the filter: we check before shipping.
Within two working days after payment, by parcel, throughout Belgium. An email gives you the tracking number.
In Brussels, Brabant and Hainaut we replace the filters during the unit's service visit and hand you a written report.