Common A/C Terms Explained

Common A/C Terms Explained | A/C Designs

When your A/C system in Jacksonville needs replacement, chances are you are performing some research to learn more about your options. It’s important, however, to know about common terms used to describe the unit and air conditioning as a whole to ensure you’re making an informed decision. Here’s a look at some of the most commonly used A/C terms and what they mean.


This is a term you’ll often see when you shop around for a new A/C unit. This refers to the Seasonal Energy Efficiency Ratio. This ratio rates units based on their overall performance and energy savings. The range for a SEER level is between 13.00 and 20.00; the higher the level, the more efficient the unit is.


Another common term used in the HVAC industry when discussing air conditioning is MERV, which stands for the Minimum Efficiency Reporting Value. This term refers to the efficiency of the air filter that comes with a unit. This rating is a measurement of the tiny holes that are found in the filter and that are responsible for removing particles from the air before it reaches your home’s vents. The higher the MERV rating, the more effective the filter is at removing these particles and the cleaner your air will be.


CFM, or Cubic Feet per Minute, is an important measurement to take into consideration when buying a new unit because it refers to the power of the unit itself. The higher the CFM, the more cooled air is able to be moved through the system at any given time.

Energy Star

Energy Star appliances are given this distinction by the Environmental Protection Agency if they meet or exceed certain guidelines set forth regarding energy efficiency. If you buy an Energy Star appliance, you may even be entitled to a tax credit or special deduction.


This is the chemical your A/C system relies on to cool air as it passes through. Most systems use Freon.


Most A/C systems have two primary coils — the condenser coil (found outside in the condenser) and the evaporator coil (found in the indoor unit). Both coils work to either increase or decrease the temperature within the home via heat transfer.


Dampers are most commonly used in Zone Control Systems, which regulate airflow within specific areas of the home via a moveable plate located within the ductwork. This can lead to energy savings because you are only heating or cooling the areas of the home that need it most.

Need help with home A/C replacement or repair? Contact the professionals at A/C Designs today! Servicing all of Northeast Florida, our certified technicians will find the best replacement or repair option for your home’s air conditioning and heating systems.