The PowerGuard for WaterFurnace and is considered by WaterFurnace to be the OEM replacement 1" MERV 10 air filter for the Geothermal Comfort Systems that use a 30 x 36 x 1 pre-filter.
The replacement filters used with WaterFurnace units that use a 30 x 36 x 1 pre-filter must use a full 30" x 36" filter. If you use a smaller filter sold by other manufacturers, your filter will not seal properly, and you could get unfiltered air leaking around the edge of the filter, this is called bypass. The 30361PG MERV 10 air filter is approximately 30" x 36" x 1" and is the size recommended by WaterFurnace for a proper fit.
This filter is technically 2 filters in one - taped together.
The 30361PG is made of 100% synthetic fibers that are needled together and then electrostatically charged to produce a MERV 10 rating.
Note: the AirGuard filters are no longer available which were rated at MERV 11, a slightly higher MERV rating to catch smaller particulate.
The manufacturer suggested replacement interval is 4 to 6 months, depending upon conditions and lifestyle. (Pets, Carpeting & active Children contribute to the need to change filters more frequently.)
We always recommend Germicidal UltraViolet (UVC) Lamps to mitigate any microbial growth. The Abatement Technologies CAP-500UV or CAP-500UVP Lamp system and/or the ultimate Indoor Air Quality Product, the Central Air Purifier CAP-600UV(P) or CAP-1200UV(P) to add to your ducted system without straining your geothermal system.
Please refer to your unit's Owner's Manual for instructions on changing your furnace's air filter.This package ships with 4 filters & are NOT returnable due to shipping issues. This size is very susceptible to physical damage during shipping, so you must inspect the contents of this package and report any damages to the Shipper (USPS - UPS - FedEx) within 24 hours!