Understanding Basic HVAC Terminology and What They Mean

Call Now: (407) 440-4545

May 1, 2022

Struggling to make sense of HVAC terminology and jargon? Call TemperaturePro Orlando at (407) 225-8903!

Every profession or industry has its unique jargon or terminology, and the HVAC field is no different. Understanding why your air conditioner isn’t blowing out cool air can be frustrating when you keep coming across new HVAC terminology.

However, just because you’re not an HVAC specialist doesn’t mean you don’t deserve to know what specific terms mean. Knowing standard HVAC terms and their definitions can help you diagnose issues.

Perhaps you want to broaden your knowledge so you can better handle minor fixes yourself or want to make talking with a professional easier. Either way, you should know these basic HVAC terms.

The next time you use Orlando’s expert AC service, you’ll be able to impress us with your knowledge!

Typical HVAC System Terms You Should Know

Air Handling Unit

An air handling unit is the device or indoor unit that circulates, cools, or warms the air. These units connect to ductwork and operate at different speeds depending on the model. In addition, an air handling unit will contain parts such as a filter system and a blower.

Condensing Unit

A condensing unit is a component of your traditional AC unit. Its principal function is to eliminate heat absorbed by its refrigerant system. The condenser then moves this heat outside.

This unit consists of a condenser coil, one or more compressors, and a device for moving air.

Split System

A split system is an HVAC system with outdoor and indoor units connected via copper tubing. There are many different examples of a split system. However, a typical split system is an air conditioner or heat pump outside your home paired with an indoor furnace.


Compressor is another frequent word you’ll come across in HVAC terminology. This device is the central part of an air conditioning unit. Its primary functions are to compress or circulate gas refrigerant as it travels throughout your HVAC system.

Indoor Air Quality

Sometimes abbreviated as IAQ, indoor air quality refers to the air quality either inside a building or just outside. Pollutants from pests, dust, debris, mold growth, a poorly functioning HVAC system, carbon monoxide, etc., can all lower indoor air quality.


You probably know this term if you know your way around a grill. BTU stands for British Thermal Unit.

BTUs determine the heat necessary to either lower or raise a pound of water by a single degree of Fahrenheit. The heat your air conditioner pulls from your home gets measured in BTUs.


HVAC, of course, is the most basic HVAC term:

  • Heating
  • Ventilation
  • Air Conditioning

Let TemperaturePro Orlando Sort Things Out

Even if you don’t repair your HVAC system yourself, knowing some basic HVAC terms can go a long way. Don’t be discouraged if there are still some terms or processes you don’t understand. That’s where the experts come in here in Orlando, FL!

Learn more about our furnace services and broaden your HVAC terminology when working with TemperaturePro Orlando. Call us today at (407) 225-8903!