Originally Posted by Coleridge

Well, It's not really a closed space (although MANY people cook & heat their house with propane). 3 sides have a 15" full length opening & the back is 1/2 open. There is plenty of fresh air flowing in the box (at head height). The heater also has a "oxygen shut-off" sensor that will turn the heater off if levels are dangerous. It's not really like a sauna, but will keep ones hands warm.

Let's see somemore pictures!