Nispira G4 G7 Replacement Filter Set Compatible with Zehnder ComfoAir 350, 500, 550, Air Ventilation Filter Kit, 1 Set — Open-Box, 17% Off

Dual-Stage Air Management: A powerful combination of a G4 coarse filter and a G7 fine filter reliably removes dust, outdoor elements, and environmental debris for clean, fresh indoor air.

Enhanced Fine Dust Defense: The specialized G7 filter is engineered to catch minuscule outdoor matter and fine dust, noticeably boosting overall air clarity and freshness in your living space.

Smart Pre-Filter Protection: The G4 pre-filter catches larger dirt particles first, shielding both the main fine filter and your ventilation system from premature clogging.

Tool-Free Replacement: Swapping out filters is quick, effortless, and requires no tools. For peak performance, it is recommended to replace them every 3 to 6 months.

Precise Dimensions: Each filter measures approximately 19.8 x 7.8 x 0.3 inches for a proper, secure fit within compatible units. Includes: 1 Fine Filter and 1 Pre-Filter.

System Compatibility: Designed specifically for Zehnder ComfoAir 350, 500, and 550 residential ventilation (KWL) systems. (Note: Not suitable for ComfoAir Q350, Q450, or Q600 models).

Experience a cleaner and more comfortable indoor environment with the Staubi-Express G4 + G7 Filter Set, a premium-quality replacement engineered to match original equipment standards for Zehnder ventilation systems. This comprehensive kit features a dual-filter design engineered for balanced, dual-action air management. It includes a G4 coarse filter for the exhaust air stream—which filters larger particles to protect your system from premature wear—and a high-performance G7 fine filter for the supply air stream. Together, they effectively trap outdoor fine dust and seasonal elements, ensuring your family enjoys fresh, circulating air year-round. High-Performance Compatibility - This set serves as a direct, high-quality alternative to original Zehnder parts. It is fully compatible with the following systems and models: Zehnder ComfoAir Series: ComfoAir 350, ComfoAir 500, ComfoAir 550 Zehnder ComfoD Series: ComfoD 350 Zehnder ComfoBox Series: ComfoBox, ComfoBox Apart Geothermal Heat Exchangers: ComfoFond-L Eco Cross-Reference Part Numbers: This filter set is designed to replace the following original manufacturer part numbers: 400100084, 006040220, 400100066, 006040230, 006040250, 006040200, 400100065, 006040210, and T; 0303033.