HRV Filter media G4 - ISO Coarse 60% - 5 mm. - HRV Filters
Helios replacement air filter mat 04239 340 D 4/4, for KWL EC 340 D, Filter 2 pieces
TOPS KWL Ventilation Filter for Paul Novus (F) 300/450 | 6 x G4 Filters | 6 x Z/Line Panel Filters Cardboard 180 x 475 x 50 mm G4 | 521010260 : Amazon.de: Stationery & Office Supplies
KWL EC 170 W F7+G4 Filter set (Efficient)
ELF - KWL 800 S/5 VDI - Replacement air filter - Helios | L&B Fans & Ducting Store
2x Air Filter replaces Helios 00039 for Helios KWL EC 450 ECO Ventilator | 888102881