what is a symbol that i can use to represent British Thermal Unit (BTU)?

Question

this is for a window pane
i have to put this on one square:
vocab. word
def.
picture

can someone please help me quick! thanx

Answer 1

Actually, the symbol is Btu. Example: 1055 joules = 1 Btu

Answer 2

'BTU' stands alone. There is no other.
However, the question is valid due to the plethora of symbols used for so many things these days. This is one old-fashioned 'dude', per se, that ain't goin' away any time soon!

Answer 3

BRITISH THERMAL UNIT HAS NOT A GRAPHIC SYMBOL, THE COMMON SYMBOL USED IT IS:
BTU.
IN BRITAIN THE SYMBOL:
BThU
HAS ALSO BEEN USED