I bought this to preheat my aircraft engine, i have no AC power, so this works great off a small battery. The price of these seems a little too cheap so hopefully it lasts. The only thing i don't like is the handle isn't very comfortable for carrying it, it's hollow on the underside. An option with the exhaust and intake built into the casing would also be nice for what I'm using it for so i didn't have to custom attach those tubes to the side, it looks a bit goofy but for the price you expect to much. i also am running it on 1K kerosene to try and keep it clean and trouble free, it hardly uses any fuel anyway.