WaterFurnace 30321WF 30x32x1 replacement air filter for Waterfurnace Geothermal units.
The Geothermal 30321WF MERV 11 air filter is approximately 30x32x1, the size recommended by WaterFurnace for a proper fit.
The 30321WF is made of 100% synthetic fibers that are needled together and then electro statically charged. The needled fibers create a dense mat that produces a MERV 11 rating and higher mechanical efficiency at a lower air resistance than other pleated filters.
The manufacturer suggested replacement interval is 4 to 6 months, depending upon conditions and lifestyle.
Case of four 30x32x1 WaterFurnace Geothermal Filters.
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