A device that removes contaminants, by mechanical filtration, from the fresh air stream before the air enters the living space. Filters can be installed as part of a heating/cooling system through which air flows for the purpose of removing particulates b ...

The energy developed through the use of heat energy.

Air brought into a building from outside to replace exhaust air.

A type of motor that has a rotor with electrical windings connected through slip rings to the external power circuit. An external resistance controller in the rotor circuit allows the performance of the motor to be tailored to the needs of the system and ...

The process of cooling by which a heat absorbing media absorbs heat from one source and radiates the heat away.

A house built into the ground or slope of a hill, or which has most or all exterior surfaces covered with earth.

A way of joining photovoltaic cells by connecting positive leads to negative leads; such a configuration increases the voltage.

A passive solar heating system in which the sun warms a heat storage element, and the heat is distributed to the interior space by convection, conduction, and radiation.

The practice of using a single meter to measure consumption and generation of electricity by a small generation facility (such as a house with a wind or solar photovoltaic system). The net energy produced or consumed is purchased from or sold to the gener ...

A unit or measure of electricity supply or consumption of 1,000 Watts over the period of one hour; equivalent to 3,412 Btu.

The amount of BTU's/hour or kW's produced by a heating system from the burning of a fuel.

A registered trademark of an agency of the state of Nebraska, for an automotive fuel containing a blend of 10 percent ethanol and 90 percent gasoline.

A type of motor designed to operate precisely at the synchronous speed with no slip in the full-load speeds (rpm).

The standard method for calculating residential cooling loads developed by the Air-Conditioning and Refrigeration Institute (ARI) and the Air Conditioning Contractors of America (ACCA) based largely on the American Society of Heating, Refrigeration, and A ...

A wood or gas burning appliance that is primarily used to provide ambiance to a room. Conventional, masonry fireplaces without energy saving features, often take more heat from a space than they put into it.

The period of low energy demand, as opposed to maximum, or peak, demand.

The price paid for goods or services at the time of a transaction; a price that has not been adjusted to account for inflation.

An air heater in which air is blown over electric resistance heating coils.

A wall to prevent the spread of fire; usually made of non-combustible material.

The structural elements (walls, roof, floor, foundation) of a building that encloses conditioned space; the building shell.