Efficient filtration: conical exhaust valve filter set with Custom ventilation filter fleece and G4 filtration grade capability to effectively capture fine particles like pet dander and pollutants for enhanced indoor air quality. Easy installation: thermal bonding technology provides a secure fit without adhesives, simplifying installation while improving noise reduction. Comprehensive protection and compatibility: designed for use with MAICO ventilation systems, this filter set provides robust protection against airborne contaminants, delivering cleaner air throughout your home. Long lasting performance: the filters are flame retardancy tested and feature sealed seams that prevent air leaks, boosting energy efficiency while minimizing noise disturbances from your system. Use scenarios Pet friendly homes: install in MAICO ventilation systems to reduce pet dander and pollutants, improving indoor air quality. Allergy or asthma sensitive occupants: use these filters to maintain cleaner air and reduce irritants circulating through the ventilation system. installs or retrofits: suitable for MAICO systems to achieve energy efficiency and quieter operation through secure, adhesive installation and sealed seams.