Zehnder Filter set Coarse 60% (G4) + ePM10 50% (M5) for ComfoSpot 50 204x60mm Rectangular Depth 180 mm

Depth 180 mm

So if you have a R90B then this fan is its direct replacement and it will fit in the same space as your existing product and ducting

Easy to install through the wall (no central ducting)

Fit and Forget

Zehnder Filter set Coarse 60% (G4) + ePM10 50% (M5) for ComfoSpot 50 204x60mm Rectangular Depth 180 mmThis filter set consist of: 1x Anti Pollen Filter: This is also know as ePM10 50% (ISO 16890) or M5 (EN 779: 2012). At least 50% of particles between 0. 3 and 2. 5 m are removed from the air. 1x System Protection Filter. This is also know as Coarse G4 Filters, 60% (ISO 16890): At least 60% of particles larger than 10 microns are removed from the air.