- A smart 2-pack of G4 / F7 replacement filters for your ventilation unit, designed for clean, allergen-friendly indoor air. - Replaces your existing air filters; tool-free filter replacement for easy maintenance. - All compatibility details and technical specifications are listed below. - These replacement filters quickly restore your ventilation unit to full operation. - The G4 pre-filter captures large particles such as hair, insects, sand, and coarse dust from the incoming air. - The F7 pollen filter provides additional protection by capturing fine dust and pollen. - Together, these filters prevent outdoor pollen and dust particles from entering your ventilation system. - Filters are easily inserted into the unit’s slide-in slots without tools. - For optimal performance, replace the filters regularly. - This filter set upgrades your ventilation unit to F7 pollen filter class without requiring an external pollen filter housing. - Note: Airflow direction is clearly marked on each filter. - Package includes: 2 filters (G4 / F7) - Technical specifications: - Dimensions per filter (L x W x H): approx. 50 x 17 x 1 cm - Filter class: F7 (red pollen filter) / G4 (black pre-filter) - Type: Pollen filter / pre-filter - Material: Synthetic fiber / plastic - Color: Black / white / red - Compatible with the following models (use Ctrl + F or Cmd + F to search for your model): - Zehnder ComfoAir 350, 550, 300 Standard, 375 Standard - Zehnder ComfoD 300, 350, 450, 550 - Paul Santos 370, 570 - Wernig G90-380, G90-500, G90-550 - Wernig ComfoAir 350, 550 - Aeris 350, 450, 550 - R+F ComfoAir 450 - R+F Optiline KWL 350 - Sanibel ComfoAir 350