How is the Sizing Capacity of an AC Unit Measured

Thinking of buying a new air conditioning unit this year? If so, it’s important to understand how the sizing capacity of an AC unit is measured. As a leading provider of AC service, Del-Air offers the following information about choosing the right AC model for your home’s size and family’s needs.

Understanding AC Capacity

Capacity is the ability of an AC system to heat or cool a given amount of space. Typically, heating capacity is expressed in BTUs, or British Thermal Units. A BTU is the amount of energy needed to change the temperature of one pound of water by one Fahrenheit degree. On the other hand, cooling capacity is specified in tons, or a measure of the system’s ability to cool. Manufacturers size heating and cooling systems according to their tonnage, with one ton being equal to 12,000 BTU/H. Most residential systems range from one to five tons.

If you want to ensure your family’s comfort throughout all four seasons, the correct sizing of AC equipment is crucial. The Del-Air technicians will consider the size of your house, as well as the number of residents, when recommending new AC units. Additionally, they might take into account factors like the amount of sun or shade rooms get.

While homeowners are often tempted to buy the biggest AC available, the truth is that oversized systems don’t improve cooling capacity. In fact, the opposite is often true. Not only does oversized equipment cost more to purchase, but operational rates are also higher. Further, oversized equipment will not run as frequently or as long when it does run, a situation known as short cycling, which accelerates the wear and tear on your equipment. ACs that are too big tend to be less energy efficient than properly-matched capacity units. Finally, systems that are too big cool the room too quickly, without removing the accompanying humidity from the air. The end result is a room that is damp and generally unpleasant.

Just as buying oversized AC units is a mistake, homeowners should avoid purchasing undersized equipment. Systems that are too small work longer and harder to meet your comfort demands during temperature extremes. This results in lower energy efficiencies, less comfort, and the potential for premature equipment failure.

Contact Del-Air for AC Service

Trust the professionals at Del-Air to perform a home “load calculation” to determine the correct size heating and cooling system for your home. Call us today for expert AC service at 888-831-2665, or schedule your consultation online.

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We are so grateful that Del-Air took care of us. It was an easy initial call. They ran routine service/maintenance. In that appointment, Raymond showed us areas in our air units that needed addressing. He took his time and made sure he made a thorough inspection of all the equipment. And what a nice gentleman. We…

Corie L.

Sanford, FL

This was my first experience with Del-Air and they were prompt, professional, and knowledgeable. They were able to get me in on the same day for a maintenance visit, which I wasn’t expecting but very much appreciated. The office staff was pleasant and so was the technician that came out to service my air conditioners. Thanks…

Kenya D.

Davenport, FL

Called at 9pm and they were at our house the next day at 9am. Thorough evaluation , great communication, and fixed our problem without a hard upsell for a whole new unit I. Honest service and I have great confidence with this company moving forward.

Matt G.

Jacksonville, FL

This is our second house using Del-Air and the value and service is why we come back. Our tech Reggie was fabulous! Above and beyond service, super nice, professional and thorough!

Suzanne S.

Tampa, FL

I have been using Del-Air for our home a/c concerns since purchasing our home 8-yrs ago. They have been and remain top- notch.

Bryan C.

Sarasota, FL