RGF Guardian Air PHI Cell 9" STD-GA System Item # QRP-9 with 110V Transformer replaces HVAC-PHI-212-GA This product is recommended for any duct air conditioning system. It is good against mold, odors, VOC's, bacteria or viruses. Applications: Family homes, apartments, town houses, basements, shops, offices, restaurants, locker rooms. HVAC Air Blower size: 1,000 to 6,500 CFM (9" BULB SIZE) Factory warranty: Two Years (continuous operation.) USA only.