Ideal heater to keep a small greenhouse warm through the night and prevent frost from building up. You can also use it as a little heater for camping outdoors if you make the flame larger. The heater comes with a 0.5L tank so it is enough to burn for 24 hours or so depending on how big the flame you set is. It has an adjustable wick to control the flame. No need to assemble as you just need to put the top over the flame. The heater can be suspended from a rafter beam or bracket using the included hook to hang it up so the heat can be concentrated further up the greenhouse if you have tall plants growing.