A mathematical representation of the frequency or ratio that specific wind speeds occur within a specified time interval.

All the components of the appliance used to condition interior air of a building.

Both a noun and a verb to describe the exterior surface of building elements (walls, floors, ceilings, etc.) and furniture, and the process of applying it.

An electrical inverter that inverts direct current electricity to alternating current electricity, and that uses another alternating current source, such as an electric power transmission and distribution network (grid), for voltage and frequency referenc ...

Classifications of fires developed by the National Fire Protection Association.

The heat that flows from the building interior, through the building envelope to the outside environment.

A type of water heater that has no storage tank thus eliminating storage tank standby losses. Cold water travels through a pipe into the unit, and either a gas burner or an electric element heats the water only when needed.

Energy produced by the conversion of biomass directly to heat or to a liquid or gas that can be converted to energy.

A valve used to mix heated water with cold in a heating system to provide a desired water temperature for end use.

The process by which materials expel or release gasses.

A seal used to prevent the leakage of fluids, and also maintain the pressure in an enclosure.

A hydropower plant that is operated at maximum allowable capacity for part of the day and is either shut down for the remainder of the time or operated at minimal capacity level.

A type of water heater that circulates water through a heat exchanger in a boiler. The heated water then flows into an insulated storage tank.

A salt, sodium sulfate decahydrate, that melts at 90 degrees Fahrenheit; a component of eutetic salts that can be used for storing heat.

The addition of dopants to a semiconductor.

The process of using heat that is rejected in one part of a cycle for another function or in another part of the cycle.

Energy output from a system that equals energy input.

A measure of the amount of energy lost during the generation, transmission, and distribution of electricity.

In reference to a wind energy conversion system, the area of a turbine blade surface that first comes into contact with the wind.

A type of heating appliance similar to a fireplace, but much more efficient and clean burning. They are made of masonry and have long channels through which combustion gases give up their heat to the heavy mass of the stove, which releases the heat slowly ...