of Fuels - Please
enter the cost in US Dollars, using a decimal point where needed. Do not use
the $ sign. Use a decimal point if needed - for instance, if you pay 1.50 cents
a therm for gas, enter 1.50. Please notice that the electric calc asks for cost
per KWH in cents, so no decimal point is needed except for fractions of a penny.
(i.e. you pay 9.5 cents per KWH, enter 9.5)
Efficiency of Appliance - Common values are already entered. These are expressed as a percentage. Efficiency is defined as the percentage of available heat in the fuel that is actually delivered into the room. Some common efficiency ranges are given below.
Notes - due to large numbers of variables, this calculator should be used as only a rough guideline for your study. Many factors affect the performance of most any heating system, but especially those of solid fuels, where the variables include operator, chimney, wood moisture, wood species and more.