Yep but the OAV unit I have is a commercial version that is very fast. It takes 12 minutes for the unit to get to the correct temperature and 15 minutes to cool off. After you bring it up to the operating temperature, it only takes 12 seconds to treat a double deep hive. You add oxalic crystals every 6-8 hives but you can do that as you vaporize so it's very quick and efficient. There are a couple of brands out there now but the one I bought is a VMvaporizer; they are made in Sacramento, California.