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If you’re currently looking for a new air conditioning installation in Conyers, GA to deal with the upcoming summer, we’re glad you’re asking a question like this. The size of an air conditioning system is one of the most important factors in choosing which AC to install. It’s not something you want to get wrong either. Go too big or too small, and you’ll have an air conditioner that doesn’t do what you need and will cost you far too much to do a bad job.
The good news is that you don’t have to make this choice yourself. It’s best to leave sizing a new AC to professionals like ours. Below we’ll get into why sizing an air conditioner is so important and how we find out the right size AC for a house.
How Is the Right HVAC System Size Determined for Installation?
- Calculate your home’s square footage to estimate base heating and cooling needs
- Evaluate insulation levels, windows, ceiling height, and sun exposure
- Factor in the number of occupants and heat-producing appliances
- Perform a Manual J load calculation to determine required BTUs or tonnage
- Select a system that matches the calculated capacity to prevent short cycling or overworking
“Why not get the most powerful central AC I can afford?”
This is where many people trip up when thinking about an air conditioner’s size. We understand the thinking here: why not err on the side of an AC that’s more powerful, since you can always turn it down? This isn’t how a central air conditioner works, however.
If an air conditioner is too powerful for a house, it will lower the indoor temperature so rapidly that the thermostat will register the AC has already completed its job, even though only the center of the house will have finished cooling down. The thermostat will shut off the air conditioner, only to turn it back on a short time later and repeat the process. This is called short-cycling, and not only does it prevent the AC from evenly cooling a house, but it also places immense strain on the system and jacks up cooling costs. o better understand why an oversized AC unit creates these issues, it helps to consider how cooling load and room coverage interact.
Unfortunately, if you work with an amateur to install your AC, you’re likely to get an oversized unit. Amateurs often try to push systems that are more expensive than necessary, and they also rarely make the effort to accurately size an air conditioner. If you’re looking for help from professionals, make sure they consider how to choose your next AC system based on precise load calculations and home-specific factors.
How we find the right size AC
Most residential homes need an air conditioner with between 5 to 10 tons of cooling. (1 ton = 12,000 BTUs of heat removed per hour.) For us to find the “sweet spot” between an AC that’s too small and too large, we perform a load calculation for the house.
This calculation determines how well the home keeps out heat, how much heat it generates from inside, and how much space needs cooling. We compile information about the house that includes the number of residents, the level of insulation, the number of lights and heat-generating appliances, the number of windows and the direction they face, and square footage. When we’re done, we’ll know the right number of tons of cooling necessary to keep the house cool without wasting power. For homeowners also considering alternatives, understanding ductless HVAC system advantages can help with choosing the best fit for unique property layouts.
You can put your trust in our technicians to provide you with a great air conditioning system installation. We offer guaranteed same-day service, and if we ever fall short, pick up the phone and call. We’ll make it right!
Frequently Asked Questions
Question: Why is choosing the right size AC important?
Answer: Choosing the correct air conditioner size ensures your home cools efficiently and comfortably. An oversized unit cools too fast and short cycles, leaving hot spots and raising energy costs, while an undersized unit runs constantly without keeping the house cool.
Question: How do professionals determine the right AC size for a house?
Answer: HVAC professionals perform a load calculation that considers your home’s square footage, insulation, number of occupants, windows and their orientation, and internal heat gains, to find the appropriate tonnage between roughly 5 to 10 tons for many homes.
Question: What is a rough guide to AC sizing using square footage?
Answer: A simple estimate is to multiply your home’s square footage by about 20 BTUs per square foot, then divide by 12,000 to convert to tons. For example, a 2,000 square foot home might need about a 3 ton unit, though climate and insulation affect needs.
Question: What can happen if my AC is too big or too small?
Answer: If the AC is too big, it will short cycle and not dehumidify well, increasing energy costs. If too small, it will struggle to maintain cool temperatures and run constantly, also wasting energy and possibly shortening system life.
Question: Should I rely only on square footage to size my AC?
Answer: No. Square footage is a starting point, but factors like climate, insulation quality, window size and orientation, ceiling heights, and home layout also influence the ideal AC size, so professional assessment is recommended.
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