The Honeywell F100F2051 Air Purifier is the correct system that uses the following:
The Honeywell F100F2051 25x22 Whole Home Air Purifier is applicable to all gas, oil and electric forced air furnaces and to compressor cooling up to 5 tons. The high efficiency filter media air cleaner has a rugged zinc-coated, roll-formed cabinet resists corrosion and can support weight of residential furnace and evaporator coil.
Honeywell F100F2051 Whole Home Purifier Specifications:
The Honeywell F100F2051 25x22 Whole Home Air Purifier uses a 4-inch extended media that makes replacement quick and easy. It does not require electrical connections and mounts in the return air duct in any position.