THE OS72 IS A 72 WATT PROFESSIONAL GRADE AIR TREATMENT SYSTEM THAT UTILIZES ULTRAVIOLET LIGHT TO KILL ODORS MOLD BACTERIA AND VIRUSES IN HVAC SYSTEMS. IT IS A COMPLETELY SEALED UNIT AND HAS 2 LED LIGHTS WHICH VERIFY THAT THE UNIT AND BULBS ARE OPERATING PROPERLY. IT IS EASY TO INSTALL AND COMES WITH STEP BY STEP DIRECTIONS WITH PICTURES A CUT-OUT TEMPLATE MOUNTING SCREWS AND FOAM TAPE ALREADY ATTACHED. SIMPLY CUT OUT THE TEMPLATE DRILL HOLES INSERT UNIT PLUG IN AND BEGIN ENJOYING FRESH CLEAN AIR THAT IS FREE FROM UNWANTED CONTAMINATES. OS7212 IS AVAILABLE FOR SYSTEMS WITH LESS THAN 16"" OF DEPTH. UV IS A PROVEN SOLUTION FOR KILLING ALL AIRBORNE BACTERIA THAT IS PRESENT IN HVAC DUCT WORK. THE OS72 SYSTEM IS SPECIFICALLY DESIGNED TO MAKE INDOOR ENVIRONMENTS SAFER AND HELP PEOPLE WITH COMPROMISED IMMUNE SYSTEMS ALLERGIES SCHOOL-AGED CHILDREN AND MORE. START BREATHING BETTER TODAY KEY FEATURES HIGH QUALITY ALUMINUM BODY 2-16"" 36 WATT UVC 254NM BULBS LED INDICATOR LIGHT(S) VERIFY PROPER OPERATION 6 FOOT POWER CORD EASY INSTALLATION - INSTALLS IN MINUTES 2 YEAR LIMITED WARRANTY TOOLS REQUIRED FOR INSTALLATION DRILL 1/4"" NUT DRIVER 3/32"" DRILL BIT 2-1/2"" METAL CUTTING HOLE SAW WARNING: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65warnings.ca.gov - Lead