How Do I Calculate What Size Air Conditioner I Need?

Summer’s intense heat is a force of nature that most homeowners combat with the trusty companionship of air conditioners. But here’s the not-so-cool truth—not all AC units are created equal, neither in power nor efficiency. Considering an AC’s purchase is a hefty investment, it’s pivotal to size it just right. But how do you determine which size is right for your home? Van Drunen Heating & Air is here to help. 

Why Size Matters

There are many mistakes you can make when it comes to air conditioners, and improper sizing is one of the biggest. Contrary to popular belief, a bigger AC unit is not necessarily better. In fact, choosing an incorrect size can cost you more in the long run. If an AC unit is too small for your space, it will struggle to cool the room effectively and constantly run on full power, resulting in higher energy bills and frequent breakdowns. On the other hand, if it’s too big, it will cool the room quickly but won’t have enough time to remove humidity, leading to a damp and uncomfortable environment. 

Determining Factors

Multiple factors influence the size of the air conditioner needed for your home. Some of these factors include: 

1. Square footage of your home – The most significant factor in determining the size of an AC unit is the square footage it needs to cool. Measure the length and width of each room and multiply them to get the square footage. Add up the square footage of each room that need to be cooled, including hallways and common areas. 
2. Climate – The temperature and humidity of your location can affect the cooling needs of your home. For instance, a humid environment may require a more powerful AC unit to remove moisture from the air effectively. 
3. Insulation – Proper insulation can significantly impact the size of the AC unit needed. A well-insulated home will require less cooling power than a poorly insulated one. 
4. Windows and doors – The number and size of windows and doors in your home can also influence the size of the AC unit. You may need a more powerful AC unit if you have large, south-facing windows that let in intense sunlight. 
5. Occupancy – The number of people living in your home can also affect your cooling needs. A larger family or frequent guests may require a bigger AC unit to maintain a comfortable temperature. 

The Importance of Professional Sizing

While it may be tempting to use online calculators or rule-of-thumb estimations, determining the right size for your AC unit is a complex process that requires professional expertise. An HVAC technician will perform a Manual J calculation, which takes into account the specific factors of your home to determine the optimal size for your air conditioner. This ensures you get an accurately sized unit that can effectively cool your home without wasting energy or breaking down frequently. 

Enjoy Your Refreshing Cool

Investing in the correct size air conditioner for your home guarantees a cool and comfortable summer and saves you money in the long run. Don’t let poor sizing lead to inefficient cooling and costly repairs. Trust the professionals at Van Drunen Heating & Air to help you calculate what size AC unit is perfect for your unique needs. Contact us today to schedule an appointment and start enjoying your refreshing cool.