These are generally very good units: I’m surprised at how much heat this 5k u it pumps out. It keeps the cabin of my boat toasty here in Alaska. Some notes on weak points of these Chinese units: The fuel line is junk and should be upgraded for safer immediately. The priming method in the instructions doesn’t work, so turn it on with the fuel line unplugged, and let the air work out of the fuel line, then quickly connect the line to the unit. An in-line bleeder valve would be very convenient to assist in bleeding/priming the line because it will need to be done every time you run the tank out of fuel. To insulate the exhaust, parts store “header wrap” works like a champ. These heaters have a few mechanical weakpoints that fail in time, but the components are readily available and easy to work on. The fuel tanks are bulky and in my application I found a different one that took up less real estate and worked better, here on Amazon. Shockingly good heaters for $125!
Bojan 
Gabor Prince 
