Filtrete 20x25x4 MERV 12 Refillable Filter Kit Review & Deal

The Filtrete 20x25x4 MPR 1550 starter kit bundles a reusable frame and two MERV 12 filters for $16.10 — here's whether the refillable system is actually worth the switch.

What you're actually getting for $16.10

This isn't just a filter — it's a starter kit with one reusable plastic frame and two replacement filter pads that slide into it. The 4-inch depth is the key feature here: deeper filters have more surface area, so they load up slower and typically last three to six months between changes rather than the one-to-two months you get from a standard 1-inch. MERV 12 (Filtrete calls it MPR 1550) sits in solid mid-tier territory — it catches fine dust, pollen, pet dander, and some smoke particles without the airflow restriction you'd get from a MERV 13 or higher. For a two-pack of filter media plus the frame, $16.10 is a reasonable entry price.

The fit question you need to answer before buying

The 20x25x4 size only works if your air handler or media cabinet is built for 4-inch deep filters — this is common in Honeywell and Lennox whole-home filtration setups, which the listing specifically calls out. If you're not sure, check the existing filter thickness or pull your HVAC manual before ordering. The refillable frame design also means replacement pads are Filtrete-specific, so you're somewhat committed to their ecosystem going forward. That said, replacement pads are widely available and usually priced reasonably. If you already have a compatible system, this kit gets you set up with two full filter cycles right out of the box.

Current deal price: $16.10 on Amazon (price/availability can change).