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  • Waterfurnace Geothermal 30x31.5 x 4 MERV 8 Koch Air Filter (12PK)

    Manufactured by Koch P44303112 aka P8S4-300-314 and is considered by WaterFurnace to be a suitable replacement MERV 8 air filter. 

    This package ships with 12 filters.

    Allow 4 to 6 weeks ARO for delivery as these are Custom ordered! These filters are non-returnable.