The Filter Affects four inch durable air filter replacement lasts for up to 12 full months. That's 365 days of service life. The Innovative design and disposable filter media replace the one inch filters you've been using. With no modifications to your existing system or grille filter fittings, the four inch return air grille conveniently fits inside your current one inch filter opening. With a few turns of screws to assemble the poly formed filter frames, the filter is ready to install and do it's job.

4-Times Filtration Benefits
4x's Filtration Media
4x's Dust Holding Capacity
4x's Service Life