Electric Heating Inspection Glossary of Terms and Conditions

100% efficient - A description commonly applied to electric resistance heating because nearly all electrical energy consumed by the heating element is converted into heat at the point of use. This does not mean the overall heating system is necessarily economical or more efficient than a heat pump.

Ampere - The unit used to measure electrical current. Commonly abbreviated as amp.

Bedroom or bathroom installations - The installation of heating appliances in bedrooms or bathrooms. Certain fuel-burning appliances are restricted or prohibited in these locations unless specifically approved and installed according to applicable requirements.

Breaker size - The current rating of a circuit breaker, measured in amperes. It must be suitable for the connected equipment and the wiring it protects.

Convection - The transfer of heat through the movement of air or another fluid. Warm air rises while cooler air generally descends, creating circulation.

Expensive - A description of heating equipment or operation involving relatively high purchase, installation, or energy costs. Electric resistance heating can be expensive to operate compared with some alternatives, depending on electricity rates and building conditions.

Immersion heaters - Electric heating elements inserted into a tank or vessel to heat water or another liquid directly.

Kilowatt - A unit of power equal to 1,000 watts.

Kilowatt-hour - A unit of energy representing the consumption of 1,000 watts of power for one hour. It is the standard unit used for residential electricity billing.

Large electrical service - An electrical service with a relatively high capacity, required by buildings with substantial electrical loads. Electric resistance heating can require a larger service than some other heating arrangements.

No ducts - A heating arrangement that does not use a forced-air duct system. Examples include electric baseboard heaters, radiant floor heating, and some wall-mounted heaters.

Ohm - The unit used to measure electrical resistance. One ohm is the resistance through which one volt produces a current of one ampere.

Radiant heat - Heat transferred primarily through infrared radiation rather than through the movement of air. Radiant heating systems may use electric elements, hot-water tubing, or other heat sources.

Radiant heating - A heating system that warms floors, walls, ceilings, or other surfaces, which then transfer heat to occupants and objects in the room.

Resistance heating - Heating produced when electrical current passes through a material with electrical resistance, generating heat. Electric baseboards and electric furnaces commonly use this principle.

Safe fill switch - A safety control associated with certain electric heating or boiler systems. Its precise function depends on the equipment; the manufacturer's documentation should be consulted to identify the intended protection.

Space heaters - Portable or fixed appliances designed to heat individual rooms or limited areas. They may use electricity, gas, or another fuel.

Unvented - An appliance or heating system that does not discharge combustion gases through a conventional chimney or vent. Unvented fuel-burning appliances release combustion products and moisture into the occupied space and are subject to significant restrictions.

Unvented systems - Heating appliances designed to operate without an external exhaust vent. Their acceptability depends on fuel type, appliance certification, location, ventilation, and applicable regulations.

Volt - The unit of electrical potential difference. Voltage represents the electrical pressure that drives current through a circuit.

Watt - The unit of electrical power. One watt equals one joule of energy transferred per second.

Wire size - The physical size or gauge of an electrical conductor. Wire size must be appropriate for the circuit's current, length, installation conditions, and applicable electrical requirements.