Heat Conduction: The transfer of the rapid vibrational energy of atoms and molecules, which constitutes heat energy, through the mechanism of atomic or molecular impact.

 

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Heat Conduction: The transfer of the rapid vibrational energy of atoms and molecules, which constitutes heat energy, through the mechanism of atomic or molecular impact.

Heathland: Open uncultivated land (particularly in the british isles) having sandy soil and dominated by small shrubs with small hard leaves (e.g., heather)

Heating Degree Day: One heating degree day is given for each degree that the daily mean temperature is below 65°F. It is used as an indication of fuel consumption.

Heating Load: The amount of heating required to keep a building at a specified temperature during the winter, usually 65° F, regardless of outside temperature.

Latent Heat: The energy released or absorbed during a change of state.

International Wheat Agreement (IWA): Replaced in 1995 by the International Grains Agreement.

Heat Wave: A period of abnormally and uncomfortably hot weather. It could last from several days to several weeks. The Weather Channel uses the following criteria for a heat wave: a minimum of ten stat . . . View Full Definition

Heat Trim: Work done by the Heating Contractor to get the home ready for the municipal Final Heat Inspection. This includes venting the hot water heater, installing all vent grills, registers, air cond . . . View Full Definition

Heat Rough: Work performed by the Heating Contractor after the stairs and interior walls are built. This includes installing all duct work and flue pipes. Sometimes, the furnace and fireplaces are insta . . . View Full Definition

Heat Pump: A mechanical device which uses compression and decompression of gas to heat and/or cool a house.