Any gaseous, liquid, or solid fuel used for indoor space heating.
Heating load
The rate of heat flow required to maintain a specific indoor temperature; usually measured in BTU per hour.
Heating season
The coldest months of the year; months where average daily temperatures fall below 65 degrees Fahrenheit creating demand for indoor space heating.
Heating seasonal performance factor (hspf)
The measure of seasonal or annual efficiency of a heat pump operating in the heating mode. It takes into account the variations in temperature that can occur within a season and is the average number of BTU of heat delivered for every watt-hour of electricity used by the heat pump over a heating season.
Heating system
Energy Efficiency program promotion aimed at improving the efficiency of the heating delivery system, including replacement, in the residential, commercial, or industrial sectors.
Heating value
The amount of heat produced from the complete combustion of a unit of fuel. The higher (or gross) heating value is that when all products of combustion are cooled to the pre-combustion temperature, water vapor formed during combustion is condensed, and necessary corrections have been made. Lower (or net) heating value is obtained by subtracting from the gross heating value the latent heat of vaporization of the water vapor formed by the combustion of the hydrogen in the fuel.
Heating, ventilating, and air conditioning (hvac)
Regulation of temperatures, through heating and cooling, inside of residential and commercial building.
Heave
(1) To raise or lift with effort or to cause to be lifted. (2) The extent of horizontal displacement caused by a fault in the earth.
Heaving
The process of a plant being pushed out of the soil that occurs when the ground alternately freezes and thaws in winter.
Heavy duty tile
Tile suitable for areas where heavy pedestrian traffic is prevalent. Can be specified to meet higher test values as determined by job requirements.
