In the listing, it says to be used in a ventilated space OR flued.
Obviously with the back door open it would be ventilated. I know you said it hasn't turned up yet but are you planning to flue it or use it as is?
If unflued (is that a word?!) can you let me know how you get on please?
I'm using Morco d61b without a flue and unless you get the heat exactly right it cuts out, assume this is the thermostat.
Also, on the one you get, can you see if the 20 minute timer is bypassable?
Thanks in advance
ps-in the long run it'll be cheaper to buy an LPG kit like you would use to run the engine from and run from that rather than bottles.
i use bottles but a mate uses the stuff from the petrol station. His works out about half the cost over a couple of years.
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