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HeatPro Glossary of Terms

AFUE

Annual Fuel Utilization Efficiency. The AFUE number represents how efficiently a furnace converts fuel to energy. The higher the AFUE percentage, the more energy-efficient or fuel-efficient the furnace. The U.S. government’s established minimum AFUE rating for a furnace is 78%.
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Air Handler

The indoor portion of a central air conditioning or heat pump system that forces cooled or heated air through the ductwork in your home. An air handler is usually a furnace or a blower coil.
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BTU

British Thermal Unit. The BTU number indicates the amount of heat required to raise one pound of water by one degree Fahrenheit. What this means is the higher the BTU rating, the higher the heating capacity of a product.
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BTUH

British Thermal Units per Hour.
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CAE

Combined Annual Efficiency. This is a measurement of the amount of heat produced for every dollar of fuel consumed for both home heating and water heating.
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Carbon Monoxide (CO)

An odorless, colorless, tasteless, poisonous and flammable gas that is produced when carbon burns with insufficient air.
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CFM

Cubic Feet per Minute. This measurement 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 ductwork by the system.
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Compressor

Considered the most important piece of a heating and cooling system, the compressor is located in the outdoor air conditioner or heat pump. It compresses and pumps refrigerant throughout the system.
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Condenser Coil

The outdoor portion of an air conditioning or heat pump system that serves as a heat transfer point for dispelling heat to the outside air, as in an air conditioner or heat pump in the summer, or for collecting heat from outside air, as in a heat pump in the winter.
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Damper

A movable plate, located in the ductwork, that regulates airflow. Dampers are used to direct air to the areas that need it most. Typically used in a zoning application.
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dB

Abbreviation for decibel. This is a unit of sound intensity.
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Ductwork

Pipes that carry air from the air handler to the air vents throughout the house.
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Evaporator Coil

The part of an air conditioner or heat pump system located inside the house in the air handler. It is here that the refrigerant evaporates as it absorbs heat from the air that passes over the coil.
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FAQ

Frequently asked questions.
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Heat Exchanger

The part located in the furnace that transfers heat to the surrounding air. The air is then forced throughout the home.
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Heat Pump

An outdoor unit that looks similar to an air conditioner but heats or cools.
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HSPF

Heating Seasonal Performance Factor. This measures the efficiency of a heat pump. The U.S. government's established minimum HSPF rating for heat pumps is 6.8%. The higher the percentage, the more efficiently the unit operates.
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Humidifier

A component that injects moisture into heated air as it passes from the furnace into the ductwork to be distributed throughout the home.
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Humidistat

Usually found on an inside wall, this device operates as a control to regulate humidity levels so that you can adjust your home comfort at the touch of a button or switch.
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HVAC

Heating, Ventilation and Air Conditioning.
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Indoor Coil

See Evaporator Coil.
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ISO 9000

A family of international standards for quality management and assurance.
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NATE

North American Technician Excellence, Inc. (NATE)is the leading certification program for technicians in the heating, ventilation, and air-conditioning (HVAC)industry and is the only test supported by the entire industry. NATE exams reflect a consensus opinion of whattechnicians need to know to effectively service and install today's sophisticated HVAC systems.
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Outdoor Coil

See Condenser Coil.
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Refrigerant

A chemical used to cool air as it evaporates. Air conditioning and heat pump systems use refrigerant in the evaporator coil to cool air as it passes by.
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Refrigerant Lines

Two copper lines that connect the outdoor air conditioner or heat pump to the indoor evaporator coil.
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SEER

Seasonal Energy Efficiency Ratio. This measures the cooling efficiency in air conditioners or heat pumps. The higher the SEER rating, the more energy-efficient the unit. The government's minimum SEER rating is 10.
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Single Package

A heating and cooling system contained in one outdoor unit.
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Split System

A combination heat pump or air conditioner that includes not only an outdoor unit but also indoor components, such as furnaces or blower coils. Split systems should be matched for optimum efficiency.
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Thermostat

Usually found on an inside wall, this device operates as a control to regulate your heating and cooling equipment so that you can adjust your home comfort at the touch of a button or switch.
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Ton

Unit of measurement for determining cooling capacity. One ton equals 12,000 BTUH.
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Zoning

A process of dividing a home into different areas or zones so each has its own heating and cooling comfort levels. For example, you may prefer to keep the kitchen cooler than a bedroom. Zoning allows you to control different temperature settings for each area, room or zone.

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