What Size Heating and Air Unit Do I Need?
When it comes to the HVAC system of your home, bigger is always better. Or at least, that’s what some HVAC companies want you to believe. This common misconception is a dangerous way of thinking.
An improperly sized HVAC unit comes with many risks, such as short cycling, high energy bills, and poor humidity control. Bigger isn’t always better; your HVAC unit should be tailored to the exact specifications and needs of your home. In this article, we’ll provide you with a roadmap for how to determine the ideal AC unit size for comfort and longevity.
The Rule of Thumb vs Reality
A common rule of thumb for estimating HVAC unit size is to allow 20 BTUs (British Thermal Units) per square foot of living space. While this is a good starting point, it’s important to take your specific home details into account. This rule assumes standard 8-foot ceilings, moderate sun exposure, and average insulation.
An HVAC’s capacity is measured by the amount of heat it can remove per hour, expressed in BTUs or tons. 1 ton of cooling = 12,000 BTUs, 2 tons = 24,000 BTUs, and so on.
Factors That Determine What Size Heating and Air Unit You Need
There are several factors that affect the potential size of your heating and air conditioning unit. The “envelope” of your home (insulation and windows) affects how much your house loses and gains heat. Do you have any vaulted ceilings? They look nice, but the higher the ceiling, the more cubic feet there are to cool.
Another factor is our climate zone. A home air conditioner here in Georgia is going to have to work harder than one in Maine. Finally, you should consider the sun exposure of the rooms in your home. Do any face the afternoon sun? That’s going to take more work to cool down.
Why Brand Quality Matters: The Carrier AC Unit Advantage
When you choose to partner with a reputable, premier brand like Carrier, you’re ensuring that the rated “size” actually delivers the expected performance. A 3-ton unit really will deliver 36,000 BTUs of cooling. Modern, high-quality units can even “size” themselves down to save energy during milder weather days, matching the heating and cooling load of your home with precision.
Lawson Air Conditioning and Plumbing is a Carrier-authorized dealer, and our Residential HVAC services are backed by the quality, care, and expertise of our professional team.
The Professional Edge
When a Lawson expert is determining the exact HVAC requirements of your home, they use a precise calculation known as a “Manual J.” This procedure ensures your unit is the exact right size. The Manual J takes into consideration your home’s orientation to the sun, insulation levels, types of windows and doors, and more. This professional assessment is more comprehensive than an online calculator, which can often miss critical details.
Get Expert HVAC Help
The right-sized AC unit improves the longevity and comfort of your home. One that runs properly and efficiently leads to lower bills and a longer-lasting system. Ready to equip your home with the HVAC system that’s just right for you? Contact us today to consult a team of professionals and protect your home.