(Left unit in picture.) Easily adaptable to upflow or horizontal duct configurations.
If you have allergies, you need effective whole-house air cleaning. Aprilaire Whole-House Air Cleaning systems provide superior cleaning benefits and proven results:
* Traps 98% of visible airborne dust and other large particles
* Permanently captures at least 97% of airborne pollen-sized particles
* Provides more than 30 times the filtering media used in standard 1" furnace filters
* Requires no maintenance other than the infrequent replacement of filtering media every 1-2 years