OdorStop OS3500UV Professional Grade Ozone Generator Ionizer for Areas of 3500 sq ft and above

I used the OdorStop OS4500UV Professional Grade Ozone Generator during a home remodel where the house had never had a dehumidifier and had that lingering damp drywall/insulation smell. With regular use, it definitely helped reduce the odor and made the space much more tolerable while we were working. That said, the real solution ended up being addressing the underlying humidity issue. Once a dehumidifier was added and moisture was controlled, the smell was truly resolved. The ozone generator was a helpful tool in the process, but not a standalone fix for an ongoing moisture problem. Where I really see this unit shining is with odor sources like smoke or one-time, stubborn smells. It’s powerful, professional-grade, and effective when used correctly. I would absolutely recommend it as part of an odor-removal strategy, especially for smoke or renovation-related smells—just pair it with fixing the root cause for best results.

I didn't think it was possible to get rid of musty, smokey odors. Thankfully, I was wrong! My son recently rented an apartment in a non-smoking building. When we were shown the apartment, it had been recently painted and the windows were open so there were no noticeable odors. Once the paint dried and the room started to warm up, it became pungent with a smell of smoke. It was extremely unpleasant, especially to someone who doesn't smoke and has asthma. We had the carpets professionally cleaned TWICE, had every surface sanitized, and ran two air purifiers on high for a week. It didn't work, and we weren't sure how he would be able to live there. I desperately searched for help when I decided to contact a professional smoke removal service. They are able to remove smoke odors from a house after a house fire (and musty, moldy smells after flooding). When I asked how they did it, they told me about the ozone generators they used. I didn't even know that these devices existed. I started to research ozone, how it works, and decided to find a unit to purchase. We weren't able to leave the apartment overnight, so we ran the unit using the timer which we set to shut off an hour and a half before he returned home. We ran it for 6 hours on two consecutive days, and the smell is COMPLETELY GONE! What was left was a fresh smell, and the air actually felt lighter and cleaner. I couldn't be more excited with the results. The customer service team is also incredible, extremely prompt in responding, very courteous and helpful. My first unit didn't seem to be working, and I called for help. They tried to help me troubleshoot the issues, but unfortunately, my first unit may have been defective. They replaced that unit with another one, and I received the new unit in a couple of days - with a prepaid return label to send the other one back. I tried the new unit, and it worked like a charm. I have read a couple of reviews that complained of the smell that the ozone generator creates. There is a very strong ozone smell that comes from the unit when it's on and shortly after using it, but the smell dissipates quickly. I wouldn't say it's a bad smell though. It kind of smells like it does during a thunderstorm or right before a rain. To me, it smells like super fresh air. They provide you with safety instructions but you should know that this can only be used in an unoccupied area. And if you have pets, you need to be sure that you take them with you when you run the unit. If you are looking for an effective way to eliminate odors, I would highly recommend this product.

I rarely write reviews, but this thing is amazing! We purchased a condo with heavy cigar and glade plug in smells. I did everything….we painted every surface, cleaned with vinegar, left vinegar out in bowls, opened doors and windows etc. nothing worked until this! Don’t let the online info about ozone treatments scare you. Just follow the instructions with no people, pets or plants in the home, it is super easy! We did tape off the common door to the condo hallway just so the ozone didn’t leak into any common spaces. Highly recommend!

When someone’s cat does what cats do on your leather couch, you need this machine to get that smell out. Use with caution!!! You have to leave the area when you use it and air it out before going in but 100% removes ALL odors. We also used it on a used car that smelled like an ashtray when the weather heated up. Amazing.

Very low noise, not too heavy, simple to use and no issues. Wouldn't recommend being in the home with it running as the instructions tell you. Once machine is finished the odor was mostly eliminated and left behind a slight ozone smell that disappear once house was vented. Very useful for all kinds of odors to include pets and that old people smell. Yall know what I'm talking about.

Very strong ozone generator. Works great and helped us a lot after two hurricanes - Helene and Milton, when our house was with no power for a couple of weeks. No odor, no moisture in the house and garage after using this Ozone Generator Ionizer. Really appreciate this good quality.

This thing does what it claims to do. Well worth the price. Highly recommended.

In all fairness, I bought this almost a year ago and didn’t need it until a week or so ago. Unboxed it, Sat it in a house on a kitchen countertop, flat surface, nothing else on the table, it turned on fine, UV came on, fans worked, ozone was coming out. I set the timer for 6 hrs and left. When I returned the machine was off and I could see the timer still running (I came back early) and I smelled the ozone. When I tried to turn it on it would not work, so I changed the fuse and still did not work. I realize I am outside of my time to return it, but it should have worked. Hey manufacturer, want to replace it?? I’ll change this rating up.