18x18x1 HVAC, Furnace, AC and Heat Pump Filters

The NaturalAire Microparticle air filter removes potentially harmful airborne particles to keep the air in your home or office clean and healthier....

18 x 18 x 1 basic filters in the the exact size of 18 x 18 x 1. Finding the perfect fit filter isn't always easy so we teamed up with a leading man...