Industry Terms

The American Gas Association or Australian Gas Association.

Air Intake Terminal
Fitting at inlet of air intake pipe allowing outside atmosphere into air intake pipe or burner venturi

Australian Liquefied Petroleum Gas Association, Ltd.

American National Standards Institute.

Appliance (Equipment)
Any device that uses gas as a fuel or raw material to produce light, heat, power, refrigeration, or air conditioning.

Capacity, Flow
The amount of a specified fluid that will flow through a valve, specific length and configuration of tubing. a manifold, fitting, or other component at a specified pressure drop in a fixed period of time. (SCFH, gpm, NmJIh, Lpm, bph).

Capacity, Rated
The rate of flow through the regulator specified by the manufacturer for a given inlet pressure, outlet pressure, offset, and size.

Canadian Gas Association.

Clean Air
A Governemnt requirement for fuel to be completely gasified and burned, producing a minimum of polluting by products such as smoke, creosote or ash.

Cold Spot
An area on a grill plate that is not reaching the desired temperature to ensure safe and consistent cooking conditions, a grill plate should achieve a consistent temperature.

Combustion Efficiency
This is a measurement (in percent) of how well solid and gas heating equipment converts fuel into useable heat energy. Complete combustion efficiency (100%) would extract all the energy available in the fuel, though this is not realistically achievable due to flue loss and boiler/heater shell losses. Combustion efficiency calculations assume complete fuel combustion and the following three factors: 1. The chemistry of the fuel (the proportions of hydrogen, carbon, oxygen and other compounds this is the fuels calorific value CV) and how much energy is chemically bound in the fuel. 2. The net temperature of the flue gases or how much heat is not being used. 3. The percentage of oxygen (O2) or carbon dioxide (CO2) by volume after the combustion process or how much O2 did the fuel completely burn (affected by the ventilation available for the heater to burn fuel correctly).

Heat transfer through a material from more energetic particles to less energetic particles.

Heat transfer occurring between a fluid in motion and a bounding surface when the two are at different temperatures.

Canadian Standards Association.

Deutscher Verein des Gas und Wasserfaches e.v. (German approval agency).

Dynamic Unbalance
The force exerted on a valve plug when fluid is flowing through the valve.

Eer (Energy Efficiency Ratio)
This is the ratio of the energy in and the chilled air out when a heat pump is in cooling mode. The rated capacity is divided by the rated total power input. In practice this is expressed as a single figure or sometimes as a percentage. For example, a system that is rated in cooling at 7kW, with a rated power consumption of 1.9kW will have an EER of 3.68 or 368% (7/1.9 = 3.68). In this instance for every 1kW of electricity purchased the heat pump is producing 3.68 times the amount of chilled air.

Conductor that transfers electric charges into or out of another conducting medium, or that influences the flow of current in another conducting medium.

Flow Rate
The amount (mass, weight, or volume) of fluid flowing through a valve body per unit of time.

Materials in a liquid, gas, or vapor state, as opposed to a solid.

Forced Air
A system that uses fans and blowers to move heated air through ducts to heat the home.

Fossil Fuel
A hydrocarbon deposit, such as petroleum, coal, or natural gas, derived from living matter of a previous geologic time and used for fuel. All fossil fuels produce carbon dioxide when burned and are a main cause of air pollution. (See greenhouse effect.)

National Association of Corrosion Engineers.

The National Emission Standards set by Ministry for the Environment.

Non Clean Air
This term refers to wood fires that do not meet the minimum air quality standards for particulate emissions (grams of carbon per kg of wood burnt). Non-clean air fires can still be used in properties located on land greater than 2ha.

Radiant heat is provide quiet directional heat.

The region between the limits within which a quantity is measured, received, or transmitted, expressed by stating the lower and upper range values (Example: 3 to 15 psi; _40° to 212°F (_40° to 1000 e»).

Reseat Point
In a relief backpressure valve which is opened by an increase in inlet pressure, the point where the valve closes.

Rural Wood Fire
A non-clean air approved wood fire on a section of 2 hectares or more.

Safety Shut off Valve
Valve automatically closed by safety control system or by emergency device. May be automatic or manual type.

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