Furnace filter box

The listing

Built on site by master craftsman. Made to fit any furnace or Hrv erv unit. Can be modified from its current configuration to fit your system with minimal effort. Insulated box is sealed. Current configuration can be capped easily. Fits 4” furnace filters 16" x 25" and has space for 1" prefilter either carbon or lower MERV value. A typical configuration would be to install a 1" pre filter at MERV 8 and then a 4" filter at MERV 12-14. The 1" filter would be changed out every month and the 4" filter once per year. This would give you hospital quality HEPA filtered air for your entire home. The system was built specifically to fit easy-to-find Home Depot/Lowes/Ace filter or you can spend some money and get higher end filters delivered from online retailers. No more allergies, sniffles, sneezing, or wheezing. Heat Recovery, energy recovery, HVAC, duct,