This reduces the "heating value" of the fuel to its "Low Heating Value". If the water vapor created in the combustion reaction is condensed, the heat of transformation (condensation) can be recovered ...

Heat index values could reach 100 at times. An AIR QUALITY ADVISORY has been issued for Butler, Clermont, Hamilton and Warren counties in Ohio; Boone, Campbell and Kenton counties in Kentucky ...

High on the list are red, bur and post oak species, which produce a heat value of 25 (measured in millions of British Thermal Units, or BTUs). In a list of many common types of firewood ...

Infrared heaters have become a popular source of home heating recently, but it's not always clear where they stand in terms of energy efficiency. Asking the question are infrared heaters cheap to ...