Ionizer; Air Cleaning Method Ionization; Maximum Air Flow Capacity 2400 cfm; Compatible HVAC System Size Up to 6 tons; Ion Output 320;000;000 ions/cc; Self-Cleaning No; For Duct Cut-Out Diameter 4 in; Overall Depth 5 in; Overall Height 2 1/2 in; Overall Width 5 in; Voltage 24 V AC; Removes Bacteria; Odors; Mounting Location Inside Duct; Outside Duct; Housing Color Black; Number of Cleaning Stages 1; Number of Speeds 1; Standards UL 867