Choosing an air conditioner for your home is one of the most important decisions you’ll make. A unit that’s too large won’t remove enough humidity from the air, leaving your home feeling overly humid and uncomfortable. Unfortunately, an undersized system won’t get to your desired temperature setting and will run constantly. This leads to excess energy consumption and premature equipment wear and tear.
What Does AC Size Actually Mean?
Air conditioner sizing is given in two main measurements, which are BTUs and tons. BTU stands for British Thermal Unit and measures how much heat the system can remove in an hour. To help simplify ratings, many manufacturers give each air conditioner a tonnage rating. One ton is equal to 12,000 BTUs per hour.
Why Proper AC Sizing Matters
Appropriate AC sizing is essential to maintaining indoor comfort, controlling humidity, and keeping your energy bills in check. An undersized system will struggle to cool your home, while an oversized one may short-cycle. Choosing the right size is key to efficient operation, a long lifespan, and reliable performance.
Problems With an Undersized AC
Unfortunately, if you get an undersized air conditioning system, it will run constantly while it struggles against Sacramento’s heat waves. You’ll notice high energy bills and more frequent breakdowns. An undersized system will have a much shorter lifespan than an appropriately sized unit.
Problems With an Oversized AC
Bigger isn’t always better when it comes to air conditioning systems. Getting an oversized unit can lead to a variety of problems, like uneven temperatures, short cycling, and poor indoor humidity control. You may experience reduced efficiency and premature component failure. To make it even worse, you’ll spend more money upfront purchasing an oversized unit than a properly sized one.
AC Size Estimates by Home Square Footage
While it’s always important to get a professional inspection to obtain an appropriately sized unit, some general guidelines can give you a ballpark estimate. Most small homes can get away with an air conditioner with a one-and-a-half- to two-and-a-half-ton capacity. Medium-sized homes typically need between two-and-a-half and four-ton systems. Larger homes require four tons or more of cooling capacity, depending on their construction and layout.
Factors That Affect the AC Size You Need
When our technician inspects your home, we’ll perform a load calculation that considers multiple factors when determining the appropriate AC size. One of the most important is the square footage of your home. Your home’s layout and ceiling height impact how well conditioned air moves throughout your home. The number of windows that you have, your sun exposure, insulation level, and the number of occupants in your home all play a role in determining proper AC sizing.
Why Sacramento’s Climate Impacts AC Sizing
One factor we always take into consideration when determining what size air conditioner you need is the local Sacramento climate. Many times, temperatures reach the triple digits throughout summer. The area experiences a very long cooling season, and afternoon sun exposure can run up your utility bills. Often, going with an energy-efficient system is one of the best ways to keep your bills in check.
Why a Manual J Load Calculation Is Important
The Manual J load calculation is a professional formula that we use to evaluate your home to determine the correctly sized air conditioner for you. It considers your ceiling height, square footage, window placement, insulation level, sun exposure, and so much more. Performing a proper load calculation ensures optimal comfort, efficiency, humidity control, and long-term system performance from your new AC unit.
Signs Your Current AC May Be the Wrong Size
If you notice that your air conditioning system is constantly running but the rooms throughout your home aren’t cooling at the same rate, it may be the wrong size. Excess indoor humidity, high energy bills, and short cycling all point to an inappropriately sized system. If you suspect that your existing system is the wrong size, it’s best to call us to discuss an upgrade.
Can You Replace Your AC With the Same Size Unit?
When you go to get an AC upgrade, it’s easy to think that you need the same size. However, it’s important to consider any changes made since your last purchase. Home additions, more occupants, and different insulation levels can all play a role in determining your new system size.
Questions to Ask Before Installing a New AC
Before having a professional AC installation, you want to make sure that there was a proper load calculation performed and that the system is sized for your current conditions. Make sure your existing ductwork supports the new unit and check for opportunities to improve efficiency.
Find the Right AC Size With CABS Heating & Air Conditioning
If you’re in the market for a new air conditioning system, a professional consultation is an absolute must. This will ensure a proper load calculation is done and that you get an appropriate and efficient air conditioning system for your needs.
Contact CABS Heating & Air Conditioning today to schedule your next AC installation or replacement service in Sacramento, CA.
