Would have thought fire would now be AR as op is going to make the lounge into a permanent bedroom.
Would be ok if fire has a ASD and is under 14kw gross {12.75 net}
I'm unsure how permanent the situation will be, I haven't spoken to the customer myself yet. I'm also 100% sure the fire has no ASD, infact it may not even have a thermocouple! I'll have a look on survey.