United States and Foreign Patents Granted - These products are protected under one or more of the following U.S. and foreign patents:

5,370,722 • 5,529,593 • 6,197,077 B1 • 2170244 • 95904185 • 6-2113 • 7,323,028 • 7,416,577 • 8,726,954 B2 • 7,416,577 B2 • 7,842,116 B2 • Other Patents Pending.

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Unprotected Condenser Coils – Use Std. Duty, Med. Duty or HD Commercial Grade Air Intake Filters


Best approach would be using HD Commercial Grade Filter with Twist Lock Fasteners.
Std. Duty and Med. Duty Filters Would Also Work