Bigger Isn't Necessarily Better When It Comes to AC Size

It is not unusual for HVAC contractors to install an air conditioner that is too large. Although it may seem like “the bigger, the better,” when it comes to air conditioning in Atlanta, nothing could be further from the truth.

It’s About the Heat Load

Determining the right size of air conditioning unit for your home takes a variety of things into consideration. It’s not only the square footage, but the heat load that must be calculated. Heat load takes into account exposed wall areas, in addition to the number of windows and glassed-in areas of the home. Your home’s insulation, the amount of shade your home receives from nearby trees, and the combined volume of your home is also analyzed.

The Problems with Oversized ACs

It takes around 10 minutes for the average air conditioner to reach peak efficiency once it is turned on. Oversized ACs run for shorter periods of time, which interfere with the optimum operation standards they were designed for. Also known as “short cycling,” this issue prevents an AC from properly reducing the humidity inside the home, greatly affecting comfort levels, and reducing the energy efficiency features of the unit. Short cycling also increases wear and tear, and increases maintenance costs.

Comfort Levels

When the correct size of air conditioning unit is installed, a lower volume of cooler air is supplied over a longer period of time. Instead of the cold drafts found around the registers, the cooler, conditioned air is mixed into the air more slowly, which increases comfort levels through better humidity control and a more uniform temperature throughout the home.

Energy Costs

The bigger the air conditioning unit, the more energy is consumed. Increased energy consumption results in higher utility bills. The short cycling of an AC unit that is too large causes it to run more, and will actually decrease the comfort levels in your home. You’ll pay more for energy that is not resulting in increased cooling and dehumidification. The high energy efficiency of modern HVAC units, along with the latest zoning technology and other energy-saving features, can actually save you money and keep you and your family comfortable even during the hottest, most humid Georgia summers.

Ductwork

Proper ductwork is essential, especially If you live in an older home, and you need new air conditioning in Atlanta or the surrounding area. The HVAC specialist will check all ductwork and the air handler as well to ensure they are operating as they should. In order for an AC unit to perform at maximum efficiency, all components must work together according to the manufacturer’s recommendations.