Filter Hut 17x26x4 Lennox (X6664) compatible filters are specifically designed to substitue for the original manufacturer Lennox 17x26x4 air filters. Filter Hut filters are MERV classified to ASHRAE 52.2 test grades ensuring that our filters will capture dust as good or better than the name brand part number (X6664) air filter. These filters also come in Odor Ban odor capturing carbon-infused media. *Name brands are used for air filter substitution identification purposes only.
- 17 x 26 x 4 nominal size.
- 16-5/8 x 26-3/4 x 4 actual size.
- Replaces Lennox brand 17x26x4 part number: X6664.
- Quality Filters Envaero brand.
- Specifically designed to replace the name brand filter.
- Filters framed and preassembled for ease of intallation. (No end caps needed, don't need expanded with combs, etc.)
MERV tested to ASHRAE grades.
- Available in Odor Ban odor capturing carbon-infused material.
- 2 filters to a case.