BioShieldUV® 72W HVAC UV Light Air Purifier Light Bulb - Air Filter UV Lamp for Air Conditioner, Whole House Dual UV UVC Light in Duct Filter, UVC Light for HVAC AC Air Conditioner

Great product for the price! The template was accurate for me. I measured the wrong section of ductwork thinking i had plenty of room, but where I ended up putting it was less wide, and it was a squeaker! The ductwork was 16" and the unit was 15 3/4". In hindsight, I would have added a spacer on the outside of the ductwork under the panel to give it a bit more room, but the bulbs weren't touching the far side, and are working fine. I can add a spacer later on. It was near impossible to keep the cutouts from falling in - they are still sitting in there. Ha! This unit replaced a very expensive UV system that was installed incorrectly over the furnace filter. DO NOT install this anywhere near the filter - the UV will shred them, and ultimately plug up your furnace. Also - the old unit did not cover a lot of space in the ductwork. You want to make sure you put this in the longest stretch of ductwork (straight - no corners) that you possible can. The longer the exposure time the air passing through gets, the more efficiently the UV will kill everything. Mine is installed along 20 feet of straight ductwork. I was spending $50 a tube x2 yearly for the old system, plus $140 a year for filters, changing them every 3 months. This unit saves me a lot of money! Two 72W tubes every 6 months for $35.00 available through the company. I am super happy with this! It didn't cost a ton of money, was easy to install, and is cheaper to maintain. And yes, it really works. I'm living in a moldy house, and it keeps me and my dog from becoming ill. I run the whole house fan a lot, so the air is going past the UV quite a bit, and it really makes a difference!

I bought this 18w unit back in 2023. Was an easy install inside the main air plenum where the incoming air hits the filters. The wiring was easy and they give lots of length to reach the HVAC switched plugs. Since installation, I have noticed a remarkable improvement with my asthma, especially in the fall and spring. This little add-on is so good that sometimes I forget that I installed it! I check on it regularly when I change the filters and today, I just noticed that both bulbs had burned out. Luckily, my purchase came with a spare set of bulbs so I replaced them and all is good. I now need to order another spare set in case of bulb failure. I have not noticed any odd scents or odors when the system is on. Breathing is way easier for sure!

The install was easy. Seems to be working as air quality in my rental "feels" cleaner and my wife hasn't had smell issues so far

Seems to be working and easy installation but i do smell ozone coming from the air inlet

I accidentally ordered the wrong units, but the fantastic support team quickly guided me to the perfect lights—what a relief! The quality is top-notch, and the kit includes everything an average homeowner might not have on hand (like a drill and screwdriver). These kits are absolutely impressive, and if you're a DIY enthusiast, the installation is a breeze—super simple and satisfying. I added two 36-watt units to my HVAC system, and my wife, who's incredibly sensitive to allergies, immediately noticed a dramatic improvement in our air quality. It's made our home feel fresher and healthier! I spent ages deciding where to buy from amid all the options, but choosing this American company was a no-brainer. Knowing I'll easily get replacement bulbs in the future gives me total peace of mind. Highly recommend—these are game-changers

It works, I hope this brand last. The other brand didn't last, the lamp ballast failed just after one year. And it was expensive to maintain. The BioShieldUV 75Watt has two bulbs and the cost for two bulbs is 2/3rds cheaper than the old brand with one bulb at 18watts.

Ordered this last November . Install was easy. It was plugged into a surge protector in a climate control attic. Just checked it today Jan 9 2026 and both lights burned out, yellowing around the connection points and power supply was very hot. Have to order new lights to see if it’s functional. Not happy

Very impressed with construction quality of this UV light. The entire structure is made from sturdy metal. The flange that sits on the ductwork has a gasket material applied to it already. There are indicator lights for each bulb that show proper operation. Before installing, I tested this unit by running in a small room to make sure that it didn't produce ozone. After operating for several hours, I shut it off and stuck my nose inside and did not smell the classic metallic scent of ozone. It was a slight smell that reminded me of suntan lotion, but after doing some googling it appears that's the UV light interacting with materials inside the room I placed it. Installation was fairly easy for me since I already had a UV light that had failed. Just had to open up a couple of the holes since these bulbs were spaced further apart. Only negative I can point out is that the cord on this unit is way too short. I needed an extension cord to reach outlet to plug it in. Other than that it seems like a top notch unit with high quality construction and quality bulbs that don't produce ozone. Expect to replace the bulbs every 12 to 18 months if you're running it continuously. Even though the bulbs may continue to shine, the UV output does start to drop over time and while they may look like they're working the UV output might not be enough to control mold and mildew inside the ductwork.