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A.F.U.E.

Annual Fuel Utilisation Efficiency. Indicated as a percentage, your furnace’s AFUE tells you how much energy is being converted to heat. For example, an AFUE of 90 means that 90% of the fuel is being used to warm your home, while the other 10% escapes as exhaust with the combustion gases.

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A.H.R.I.

Air Conditioning, Heating and Refrigeration Institute. An industry association that establishes the norms for measuring and certifying product performance.

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Dual Fuel

A system that combines an electric heat pump and gas furnace to maintain home comfort levels. It is an energy efficient alternative to the conventional combination of furnace and air conditioner.

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B.T.U.

British Thermal Unit. Used for both heating and cooling, BTU is a measure of the heat given off when fuel is combusted. For cooling, it’s a measure of heat extracted from your home. (One BTU is approximately equal to the heat given off by a wooden kitchen match.)

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B.T.U.H.

British Thermal Units per Hour. A British Thermal Unit (BTU) is the unit of heat required to raise 1 pound of water by 1 degree Fahrenheit.

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Capacity

The ability of a heating or cooling system to heat or cool a given amount of space. For heating, this is usually expressed in BTUs. For cooling, it is usually given in tons. On the nameplate of the unit the amount of B.T.U. is gross so to have the real capacity, you must take this amount and multiply it by par the rate of efficiency to have the real rate of B.T.U. Gross B.T.U x % effinciency = Real B.T.U capacity.

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C.F.M.

Cubic Feet per Minute. A measurement of airflow that indicates how many cubic feet of air pass by a stationary point in one minute. The higher the number, the more air is being forced through the system.

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Downflow

A type of furnace that takes in cool air from the top and blows out warm air from the bottom; commonly used where furnaces must be located in a second-floor closet or utility area.

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Horizontal Flow

A type of furnace, installed on its “side” that draws in air from one side, heats it, and sends the warm air out the other side. Most often used for installations in attics or crawl spaces.

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Up Flow

A type of furnace that draws cool air from the bottom and blows the warmed air out the top into the ductwork. This type of furnace is usually installed in a basement or an out-of-the-way closet.

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Compressor

A compressor is part of a split-system heat pump or air conditioner’s outdoor unit that controls the pressure applied to the refrigerant. It is needed both for taking in heat to warm your home with a heat pump and for getting rid of heat to keep your home cool.

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Scroll compressor

A specially designed compressor that works in a circular motion vs. an up-and-down piston action.

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Two stage compressor

Two Stage Compressors are capable of two levels of operation: a low stage and a high stage. Properly sized equipment will operate 80% of the time in low stage, enhancing efficiency and comfort with lower humidity levels and quieter operation. It’s like getting two air conditioners or heat pumps in one system.

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Reciprocating compressor

A type of compressor used in air conditioners that compresses refrigerant through a “piston” action.

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Ductwork

Hollow pipes used to transfer air from the Air Handler to the air vents throughout your home. Ductwork is one of the most important components of a home heating and cooling system.

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Operating cost

The day-to-day cost of running your home comfort equipment, based on energy use.

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H.V.A.C.

Abréviation for Heating, Ventilation, and Air Conditioning.

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dB

Decibels (dB) are a unit measuring the intensity of noise.

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E.E.R.

Abréviation for Energy Efficiency Ratings (EER) measure the efficiency with which a product uses energy to function. It is calculated by dividing a product’s BTU output by its wattage.

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ENERGY STAR®

ENERGY STAR is a government-sponsored program helping businesses and individuals protect the environment through superior energy efficiency. Products with the ENERGY STAR rating are the most efficient and will reduce energy bills.

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Heat Exchanger

The part of a furnace that transfers heat to nearby air.

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Load Estimate

A series of studies performed to determine the heating or cooling requirements of your home. An energy load analysis uses information such as the square footage of your home, window or door areas, insulation quality and local climate to determine the heating and cooling capacity needed by your furnace, heat pump or air conditioner. When referring to heating, this is often known as a Heat Loss Analysis, since a home’s heating requirements are determined by the amount of heat lost through the roof, entryways and walls.

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Refrigerant

Fluid used within a refrigerating system to transfer temperatures and pressure to heat through a change of state.

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R-22 Refrigerant (Fréon R-22)

R-22 is a single component HCFC refrigerant with low ozone depletion potential. It has long been used in a variety of air-conditioning and refrigeration applications in several markets. Per EPA regulations, new R-22 cannot be used in new systems effective in 2010, although service quantities of the refrigerant may be produced until 2020.

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R-410A Refrigerant(Fréon R-410)

Chlorine-free, ozone-friendly refrigerant that is currently being used to replace R-22 in compliance with EPA regulations.

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H.S.P.F.

Heating Seasonal Performance Factor is a measure of the heating efficiency of a heat pump. The higher the HSPF number, the more efficiently the heat pump heats your home.

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I.A.Q.

Abréviation for Indoor Air Quality. HVAC industry term that defines the standards needed for a comfortable home.

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M.E.R.V.

Abréviation for The Minimum Efficiency Reporting Value is the standard comparison of the efficiency of an air filter. The MERV scale ranges from 1 (least efficient) to 16 (most efficient) and measures a filter’s ability to remove particles from 3 to 10 microns in size.

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Carbon Monoxyde

A colourless, odourless, highly poisonous gas produced when carbon-based fuels, such as natural gas, burn without sufficient air nearby.

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Variable Speed Motor

Motor that automatically varies the flow of warm and cool air to enhance comfort levels.

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Register (Floor Grille)

Damper like module attached to the floor grille used in conjunction with the ventilation ducts that open and closes to fine tune the air flow. It is often used in zoning to control the quantité of hot or cold air that is being sent to different area of the house.

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S.E.E.R

Abréviation for Seasonal Energy Efficiency Ratio is a measure of the cooling efficiency of your air conditioner or heat pump. The higher the SEER number, the more efficient the system is at converting electricity into cooling power.

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Fan Coil

An indoor component of an air conditioner or heat pump system used, in place of a furnace and evaporator coil, to change the refrigerant from a gas to a liquid (or vice-versa) and blow air over the coil to cool or heat your home.

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Evaporator Coil

Part of a split-system air conditioner or heat pump and located indoors. The evaporator coil cools and dehumidifies the air by converting liquid refrigerant into a gas (or vice-versa). A blower motor, typically in a furnace, then moves air over the coil to either heat or cool your home. <p> </p>

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Condenser Coil

The condenser coil is part of the outdoor portion of a split-system air conditioner or heat pump. The coil transports heat by converting refrigerant that is in a gas form back to a liquid.

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Interior Coil

See Evaporator Coil

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Outdoor Coil

See Condenser Coil

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Smart Recovery

Smart Recovery starts the system in advance to make sure that each zone reaches your selected temperature setting at the scheduled time.

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Split System

Refers to an air conditioner or heat pump that has components in two locations. Usually, one part of the system is located inside (evaporator coil) and the other is located outside your home (condenser coil).

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Central Air System

A system by which air is treated in one location and then distributed between rooms using fans and ductwork.

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Geothermal Systems

Geothermal systems use the free, renewable solar energy stored just below the earth’s surface to provide your home with cost-effective and carbon-neutral heating, cooling and hot water.

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Heat Pump

A product that works just like an air conditioner in cooling mode; however, in heating mode, the refrigerant flow is reversed and heat is extracted from the outside air to heat your home.

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Thermostat

Unit that monitors and controls your HVAC system products.

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Thermostat (Programmable)

Latest technology thermostat which contains a chip to store different programs to obtain different setpoints at different times during the day.

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Ton

A unit of measure for cooling capacity. One ton = 12,000 BTUs per hour.

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UL

UL is an objective, non-profit organization that tests and rates electrical products for public safety.

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Zoning

A way to increase your home comfort and energy efficiency by controlling when and where heating and cooling occurs in a home. Programmable thermostats are used to control operating times of the equipment. Dampers are used to direct airflow to certain areas or “zones” of the home.

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