HVAC Glossary of Terms

Terms and technical definitions for heating, cooling, and indoor air quality products.


Air Flow

The distribution or movement of air

Air-Conditioning and Refrigeration Institute (ARI)

ARI is an industry trade association that develops standards for measuring and certifying product performance. For instance, ARI Standard 270 provides guidelines for establishing sound levels for outdoor air-conditioning equipment.

Air Handler/Coil Blower

The indoor part of an air conditioner or heat pump that moves cooled or heated air throughout the ductwork of your home. An air handler is usually a furnace or a blower coil.

BTU

A British thermal unit is a unit of heat energy. One Btu is the amount of heat required to raise one pound of water by one degree Fahrenheit. The higher the Btu rating, the greater the heating capacity of the system.

CAE

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

Carbon Monoxide

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

Central Air Conditioning System

A system in which air is treated at a central location and distributed to and from rooms by one or more fans and a series of ducts.

CFM

Stands for 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 moved through the ductwork by the system.

Composite Fan Blades

Used in select outdoor air conditioner or heat pump units, blades are manufactured with rugged materials and an exclusive angled design that improve operation and durability, even in the harshest environments.

Compressor

The part of the outdoor air conditioner or heat pump that compresses and pumps refrigerant to meet household cooling requirements.

Condenser Coil

The outdoor portion of an air conditioner or heat pump that either releases or collects heat, depending on the time of the year.

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.

DB

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

DOE

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

Ductwork

The method by which air is channeled from the furnace or the blower coil throughout your home.

Electronic Air Cleaner

An electronic device that filters out large particles and bioaerosols in indoor air.

ENERGY STAR®

An EPA (Environmental Protection Agency) designation attached to HVAC products that meet or exceeds EPA guidelines for high-efficiency performance above the standard government minimums.

EPA

The Environmental Protection Agency develops and enforces federal environmental regulations. The EPA oversees the nationwide ENERGY STAR® program.

Evaporator Coil

The part of the air conditioner or heat pump that is located inside the air handler or attached to the furnace. Its primary function is to absorb the heat from the air in your house.

Garage Heaters

Garage heaters are an excellent product for combating cold garages and workshops during the winter months. Heating capacities provide heating for hard-to-eat applications. Available in natural or propane gas, units should be installed by a dealer or installer.

Heat Exchanger

Located in the furnace, the heat exchanger transfers heat to the surrounding air, which is then pumped throughout the home.

Heat Pump

A heat pump is an HVAC unit that heats or cools by moving heat. During the winter, a heat pump draws heat from outdoor air and circulates it through your home’s air ducts. In the summer, it reverses the process and removes heat from your house and releases it outdoors.

Horizontal Flow

When an air handler or furnace is positioned on its side and circulates air in one end and out the other. Ideal for attic crawl space installations.

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.

HVAC

Heating, Ventilation and Air Conditioning.

Indoor Coil

See Evaporator Coil.

ISO 9000

A family of international standards for quality management and assurance.

MERV Rating

The MERV (Minimum Efficiency Reporting Value) rating of a filter describes the size of the holes in the filter that allow air to pass through. The higher the MERV rating, the smaller the holes in the filter, the higher the efficiency.

Micron

A unit of measure equal to one millionth of a meter, or one thousandth of a millimeter.

Odors/Chemicals

Air contaminations in the form of gases.

Off-grid or Off-the-grid

An off-grid electricity-generating system operates independently from the utility grid, providing all of the electricity needed in the home. Stand-alone systems are much more expensive than grid-tied systems. However, for homes located in remote areas without utility service, or where installing power lines would be extremely costly, a stand-alone system is a good option.

Outdoor Coil

See Condenser Coil.

Programmable Thermostat

A thermostat with the ability to record different temperature and time setting for your heating and cooling equipment.

R-410A Refrigerant

A chlorine-free refrigerant that meets the EPA’s newest, most stringent environmental guidelines.

Refrigerant

A chemical that produces a cooling effect while expanding or vaporizing. Most residential air conditioning units contain the standard R-22 refrigerant, or Freon.

Refrigerant Lines

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

SEER

The Seasonal Energy Efficiency Ratio is an energy efficiency rating for air conditioners. The higher the SEER, the better the energy performance, the more you save. The DOE’s established minimum SEER rating for cooling is 13.00.

Single Package

A heating and cooling system contained in one outdoor unit.

Split System

An HVACD system in which some components are located inside the structure of the house and someone located outside. Split systems should be matched for optimal efficiency.

Thermostat

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

Ton

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

Two-Stage Operation

Provides two levels of heating or cooling output for greater temperature control, energy efficiency and improved indoor air quality.

Upflow

When an air handler or furnace is installed in an upright position and circulates are through the side or bottom and out through the top. Typically used in basement, closet and attic installations.

Variable-Speed Motor

A motor that automatically adjusts the flow of warm or cool air for ultimate comfort.

Ventilator

A system that exchanges stale, recirculated indoor air with fresh, filtered outside air.

Zoning

A method of partitioning a home into independently controlled comfort zones for enhanced comfort and efficiency.


Contact Us If You Need HVAC Work in Colorado Springs

You can always count on the team at Mitchell Heating Colorado for all your HVAC needs. Whether you need a professional to work on your heating system, furnace, water heater, air conditioning system, or humidifier, we are more than capable of shouldering the task! We can repair, maintain, or sell you a replacement HVAC or related system of your choice. Be sure to give us a call, or use our online scheduler, to set a date and time for us to help out you and your Colorado Springs property!

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