Universal Replacement pre-filter HEPA models Honeywell air purifier. Suitable; virtually any Honeywell QuietCare and SilentComfort series models; traps more than standard carbon filters; helps reduce common household odors ... It comes with good installation instructions, and getting it out of the box and onto your Hepa filter is a breeze, so if you're in the market for one of these suckers (which if you're like me, means you're in the market every 3 months),......