(An exajoule is roughly equivalent to a quadrillion BTUs or 174 million barrels of oil.)
Box heaters come in a variety of sizes, and can produce anywhere from 10,000 to 200,000 BTUs.
The other part of the cost equation is the number of BTUs the unit produces.
The main distinction between these units is the BTUs.
A/C units with a capacity of 7,200 BTUs offer cooling for small spaces, while models with more than 12,000 BTUs cool larger spaces.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.