First impressions: - The propane canister instantly develops a layer of frost. Total runtime is probably measured in minutes - The entire room gets wrapped in a blanket of radiant heat - Possessing this would get you immediately arrested in England
I have one similar, but probably a bit smaller...never left it wide open for very long, so I dunno about frost on the bottle, but it likely would
I have had good luck this year with top downs, Building the wood up until it the outer sides are higher than the middle, putting one piece of news paper length wise, a quarter super cedar on it, then overlapping some kindling, small splits over the middle where the cedar is.
I use the trigger actuated soldering torches. Less flame than that and I can turn it down so that it's pretty quiet and doesn't blow smoke out the loading door before the chimney can suck it up. You can refill those green tanks for like 20 cents each if you didn't know.