For window units with a Btu rating above 8,000, the DOE is pushing for an even higher CEER, and encouraging manufacturers to use inverter technology to get there.

More specifically, the study calculates that it takes 740,000 British thermal units (BTU) of fossil energy to make and deliver 1,000,000 BTUs of cornstarch ethanol. Skip to main content NEWS ...

For example, a portable model that was formerly listed at 14,000 Btu (called the ASHRAE rating, from the American Society of Heating, Refrigerating and Air-Conditioning Engineers) may now carry a ...

Portable air conditioners are increasingly popular this summer — here are the best portable AC deals right now, with models sporting as much as 14,000 BTUs. IE 11 is not supported.