411 REFERENCE · Wiktionary
MMBtu
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Alternative forms
en mmBtu
Etymology
Replaced the earlier MBtu (one thousand BTUs) as the 'M' could be misinterpreted as the SI prefix mega- (one million) or milli- (one thousandth)
Noun
one million BTUs