How Big Does My Furnace Need to Be? and What the Heck Is a BTU?
Furnaces are evaluated by the amount of heat they can put out or what we call British Thermal Unit or, you guessed it, a BTU. A BTU, or known by its close friends as 1055 Joules, is the amount of energy required to raise the temperature of one pound of water by one degree Fahrenheit. […]
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