Flue

Any vent or passageway that carries the products of combustion from a furnace.

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Indoor Air Pollution

The UT needs to know about indoor air pollution. It is important because the UT will be called to figure out how to deal with these issued during a career.

Below is a link to an interesting article:

Indoor Air Pollution

Copper Tubing

Here is a link from the Copper Development Association. http://www.copper.org/applications/plumbing/techref/cth/tables/cthindex_table.htm

This has some interesting specifications about copper tubing.

Lennox SureLight Ignition

Below is a link for the service manual for the Lennox SureLight Ignition System...just remember when in doubt, read the manual.

Surelight Ignition System

AC

Abbreviation for alternating current, a type of electric current in which the polarity is constantly reversing causing the electron flow to reverse.

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ACCA

Air Conditioning Contractors of America

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Acoustical

Of or pertaining to sound.

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AC or DC

Abbreviation for equipment capable of operating on alternating or direct current.

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A-Coil

A heat exchanger consisting of two diagonal coils that are joined together in a manner that looks like the letter "A".

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AFUE

Annual Fuel Utilization Efficiency. A measure of a gas furnace's efficiency in converting fuel to energy - the higher the rating, the more efficient the unit.

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AGA

Abbreviation for American Gas Association, Inc.

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Air Conditioner

Any device that can change the temperature, humidity or general quality of the air.

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Air Filtration System (also Air Cleaner)

Removes airborne allergens from your home.

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Air flow volume

The amount of air the system circulates through your home, expressed in cubic feet per minute (cfm). Proper air flow depends on the outdoor unit, the indoor unit, the ductwork and even whether the filters are clean.

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Air handler

An air moving and/or mixing unit. Residential air handlers include a blower, a coil, an expansion device, a heater rack and filter. Heaters for air handlers are sold as accessories. In some models heaters are factory installed.

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ARI

Air Conditioning & Refrigeration Institute

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ASHRAE

American Society of Heating, Refrigeration and Air Conditioning Engineers

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BTU

British thermal unit; the amount of heat required to raise or lower the temperature of one pound of water one degree Fahrenheit. The heat extracted from your home by an air conditioner is measured in BTUs.

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BTUh

British thermal units per hour. 12,000 BTUh equals one ton of cooling.

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Burner

A device that uses fuel to support combustion.

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