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HVAC Glossary of Terms

Comprehensive HVAC Glossary of Terms

Meta Title: HVAC Glossary of Terms | HVACProSales.com

Meta Description: A comprehensive glossary of HVAC terms and definitions for professionals and homeowners. Learn the language of heating, ventilation, and air conditioning with HVACProSales.com.

Meta Keywords: HVAC glossary, HVAC terms, HVAC definitions, air conditioning terms, heating terms, ventilation terms, HVACProSales.com

Introduction

This glossary provides a comprehensive list of common terms and acronyms used in the heating, ventilation, and air conditioning (HVAC) industry. Whether you are a seasoned professional or a homeowner looking to better understand your system, this resource will help you navigate the complex world of HVAC.

A

  • AFUE (Annual Fuel Utilization Efficiency): A measure of a furnace's heating efficiency. The higher the AFUE rating, the more efficient the furnace.
  • Air Handler: The indoor unit of an HVAC system that contains the blower, heating and/or cooling elements, and filter racks.
  • AHRI (Air-Conditioning, Heating, and Refrigeration Institute): A trade association that develops standards for and certifies the performance of HVACR equipment.

B

  • BTU (British Thermal Unit): A unit of heat energy. The amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit.
  • Blower Motor: The motor that powers the blower, which circulates air through the ductwork.

C

  • Capacitor: An electrical component that stores energy and provides a boost of power to start the compressor and fan motors.
  • Compressor: The heart of an air conditioning or heat pump system. It pumps refrigerant through the system.
  • Condenser Coil: The outdoor coil in an air conditioning or heat pump system that releases heat into the outdoor air.
  • Contactor: An electrical switch that controls the flow of power to the compressor and condenser fan motor.

D

  • Damper: A valve or plate that controls the flow of air inside a duct, chimney, or other air-handling equipment.
  • Ductwork: A system of channels or pipes that distributes heated or cooled air throughout a building.

E

  • Evaporator Coil: The indoor coil in an air conditioning or heat pump system that absorbs heat from the indoor air.

F

  • Filter-Drier: A component in the refrigerant line that removes moisture and other contaminants from the refrigerant.
  • Furnace: An appliance that heats air and distributes it throughout a building via ductwork.

H

  • Heat Exchanger: A component in a furnace that transfers heat from the combustion process to the air.
  • Heat Pump: An HVAC unit that can both heat and cool a space by moving heat from one location to another.
  • HSPF (Heating Seasonal Performance Factor): A measure of a heat pump's heating efficiency. The higher the HSPF rating, the more efficient the heat pump.

I

  • Igniter: A component in a gas furnace that ignites the fuel.

M

  • MERV (Minimum Efficiency Reporting Value): A rating system for air filters that measures their ability to capture airborne particles.

P

  • Plenum: An air-distribution box attached directly to the supply outlet of the HVAC equipment.
  • Pressure Switch: A safety device that monitors the pressure within the furnace and shuts it down if it detects an unsafe condition.

R

  • Refrigerant: A chemical compound used in air conditioning and refrigeration systems to transfer heat.
  • Refrigerant Lines: The copper tubes that carry refrigerant between the indoor and outdoor units of an HVAC system.

S

  • SEER (Seasonal Energy Efficiency Ratio): A measure of an air conditioner's or heat pump's cooling efficiency. The higher the SEER rating, the more efficient the unit.
  • Solenoid Valve: An electrically operated valve that controls the flow of refrigerant.

T

  • Thermostat: A device that controls the operation of an HVAC system based on the temperature of the room.
  • TXV (Thermostatic Expansion Valve): A precision device that controls the amount of refrigerant flowing into the evaporator coil.

V

  • Ventilation: The process of supplying fresh air to a space while removing stale air.

Z

  • Zoning: A system that divides a home or building into different zones, each with its own thermostat, to allow for independent temperature control.