Vallox Filter Set 21 For Vallox 121 Models (7911902)

Vallox filter set 21 is a genuine filter package designed specifically for Vallox 121 SE and 121 MC ventilation units. The set includes all the filters needed for one maintenance interval: two coarse filters and one efficient F7-class fine filter for the supply air. Each filter is pre-cut to fit perfectly into the compatible units, ensuring easy installation and optimal system performance.

Vallox replacement filters 121 keep your indoor air fresh by efficiently removing dust, pollen, and other airborne particles. Properly sized filters help maintain system balance and protect the ventilation unit from moisture and dirt accumulation. The recommended replacement interval is 1–2 times per year, depending on usage and environmental conditions.

During filter replacement, it’s advisable to check the condition of seals and clean the unit’s interior parts. This supports clean indoor air and extends the lifespan of the ventilation system.

Product Details:

• Part number: 3422900
• HVAC code: 7911902
• Manufacturer: Vallox
• Application: Ventilation unit
• Compatible models: Vallox 121 SE, Vallox 121 MC
• Includes:
  • Coarse filter for supply air (ISO Coarse > 75%), 277 x 403 mm
  • F7 fine filter for supply air (ISO ePM1 50%), 288 x 398 mm
  • Coarse filter for exhaust air (ISO Coarse > 75%), 183 x 554 mm