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

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

The transfer of heat through a material by the transfer of kinetic energy from particle to particle; the flow of heat between two materials of different temperatures that are in direct physical contact.

A wood or gas burning heating appliance that fits into the opening or protrudes on to the hearth of a conventional fireplace.

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

Features and vegetation on the outside of or surrounding a building for aesthetics and energy conservation.

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 ...

A curve that indicates the number of hours per year that specific wind speeds occur.

A turbine that is driven by high velocity jets of water or steam from a nozzle directed to vanes or buckets attached to a wheel. (A pelton wheel is an impulse hydroturbine).

A device used to control temperatures; used to control the operation of heating and cooling devices by turning the device on or off when a specified temperature is reached.

The effect of cooling by the radiation of heat from a building to the night sky.

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 ...

The quantity of heat produced to change a unit weight of a liquid to vapor with no change in temperature.

A construction element used for ceiling support.

A type of heating system where heat, resulting when electric current flows through an "element" or conductor, such as Nichrome, which has a high resistance, is radiated to a room.

The transfer of heat through matter or space by means of electromagnetic waves.

The processes that a work input/output system undergoes and in which the initial and final states are identical.

Energy supplied during periods of relatively high system demands as specified by the supplier.

The ability of a building construction assembly (partition, wall, floor, etc.) to resist the passage of fire. The rating is expressed in hours.

A system capable of rotating about one axis.