"I purchased the heater to provide secondary heat in the back rooms of my wifes shop. I wanted something small with simple operation that would get the job done. There are three rooms with out heat and two of them have an exterior wall (one upstair of the other). their sizes are 15x15, 15x20 and 20x20, with large doorways connecting them.
This little heater fit the bill perfectly. I connected a small 20lb propane bottle (to make it more portable) and regluator. I know that the instructions say to use a 100lb or larger but I have not had any issues. Even on -20 degree days it keeps all three rooms warm. It works so well that after the rooms warm up you have to turn it way down. I would recommend this for anyone that has a small work space they need to heat but don't have the ability to vent it.
The down side is the piezio ignitor is kind of tempermental. It also has a slight odor when you first fire it up but that goes away in a few minutes. And I think the optional fan would have really added to it's ability."
What is your level of technical expertise? Home Handyman