What size of Multifuel stove do I need?
	To achieve approx 70ºF (20ºC) inside, when it is 32ºF (0ºC) - freezing - outside, you need 1kw of heat for every 500 cubic feet of room space.  For example:-
	A room measuring 21ft x 15ft x 9ft high would require a stove with an output which is calculated as follows:
	(21 x 15 x 9) ÷ 500 which equals 5.7kw.
	Note: You can allow a little more for such openings as doors, windows etc.