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Glossary of Terms

Air Handler
It is mainly a blower coil or furnace. It is an indoor part of AC or heat pump and its function is to move the heated or cooled air throughout the duct of your home.

Airflow
The distribution or movement of air.

ARI
(Air-Conditioning and Refrigeration Institute) an industry trade association. Work to publish standards for testing and certifying HVAC products performance.

AFUE
(Annual Fuel Utilization Efficiency) used for measuring the heating efficiency. A higher rating indicates more efficient equipment. This rating is calculated and assorted after complete testing of the product as outlined by the Department of Energy.

CAE
The Combined Annual Efficiency is a measure of the amount of heat produced by fuel consumed for both home and water heating.

CFM
(Cubic Feet per Minute): It is a measure of the cubic feet of air pass by a stationary point in one minute.

Carbon Monoxide
When carbon is burned in insufficient air supply then it produces a poisonous, flammable, colorless & odorless gas.

Condenser Coil
Network of tubes filled with refrigerant. It function is remove heat out from the air when liquid refrigerant evaporates.

Compressor
Heart of the heating and cooling systems its function is to compress and pump the refrigerant.

Ductwork
A duct system through which air is channeled from the furnace. It is a pipe made of sheet metal, fiberglass board material and is used for conducting air to and from an air handling unit.

DOE
The Department of Energy is a federal agency responsible for setting industry efficiency standards and monitoring the consumption of energy sources.

dB
It is a decibel unit used to measure the relative intensity of sound.

Damper
A type of a “valve” used in ductwork that opens or closes to control airflow. Mainly used in zoning application.

EPA
The Environmental Protection Agency develops and enforces federal environmental regulations. ENERGY STAR®- (Environmental Protection Agency) designation attached to HVAC products that meet or exceed EPA guidelines for high-efficiency performance above the standard government minimums.

Electronic Air Cleaner
Function is to filter out large particles and bioaeroslos in indoor air.

Evaporator Coil
The evaporator coil cools and dehumidifies the air by converting liquid refrigerant into a gas. This part is located inside the AC and it absorbs the heat from the air.

Filter
This device is used to remove dust and other particles which protect the HVAC equipments. MERV is the rating system used to measure filter effectiveness.

HVAC
Heating, ventilating and air conditioning.

Heat Pump
A HVAC unit system which gets heats or cools by moving heat.

Humidifier
An indoor air quality device that introduces moisture to heated air as it passes from the furnace into the ductwork for distribution throughout the home.

Heat Exchanger
This is a part of furnace that transfers heat to the surrounding air, which is then pumped throughout the home.

HSPF
Heating Seasonal Performance Factor, an equipment efficiency rating.

IOS 9000
A family of international standards for quality management and assurance.

Micron
This helps in measuring the unit equal to one millionth of a meter, or one thousandth of a millimeter.

MERV Rating
(Minimum Efficiency Reporting Value). Rating of the filter describes the size of the filter that allows air to flow.

Odors/Chemicals
Air contaminants in the form of gases.

Programmable Thermostat
A state of the art electronic thermostat with a built in memory that can be programmed for different temperature settings at different times of the day.

Particles
Any substance measuring less than 100 microns in diameter. If EPA have found small particles (less than 2.5 microns) are responsible for health effects.

Refrigerant & Refrigerant Lines
Most residential air conditioning units contain the standard R-22 refrigerant or Freon. Refrigerant lines are two copper lines that connect the outdoor AC to indoor evaporator coil.

SEER
(Seasonal Energy Efficiency Ratio), an equipment efficiency rating that measures how much energy it takes to cool the air.

Two-stage Operation
Provides two levels of heat output for greater temperature control.

Ton
Unit of measurement for determining cooling capacity. One ton equals 12,000 Btuh.

Thermostat
A temperature control device that consists of a series of sensors and relays that monitors and controls the functions of a home comfort system.

Ventilator
A system that exchanges stale recalculated indoor air with fresh & filtered outside air.

Variable Speed Motor
This automatically adjusts the flow of warm or cool air for ultimate comfort.

Zoning
A way to increase your comfort and energy efficiency by controlling when and where heating and cooling occurs.

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