Well, one kitchen match is 1 BTU.
4800 BTUs will 150 square feet.
90,000 BTUs - the 090 is what tells you the BTUs of the unit.
5,000
A 100 pound propane tank has a capacity of 2,160,509 BTUs
6,520 Btus
A romm 20x9 is 180 square feet. You will need 5000 to 6000 BTUs for this.
The answer depends on the city. Somewhere like Colombo (Sri Lanka) will probably require 0 btus.
27,304
10.28
2000
There are 1078.9 BTUs.
2KW conversation in BTU