A contractor did some repairs
A contractor did some repairs in my office and filled a gap with some sort of epoxy that was off-gassing a terrible chemical odor for months. It was inside the dry-wall so I was unable to reach it. I tried keeping windows open, venting the room, an ozone machine, carbon air fresheners, candles, everything but no luck. Six months later, I got Oransi and the odor was gone the next day. I was left asking myself why I didn't get this air filter sooner? It's great for VOC odor 100%! The open box product was perfect. Highly recommend.