When it’s time for a new AC installation in Joliet, IL, one of the most important factors to consider is choosing the correct size system for your home. Many homeowners assume bigger is better when it comes to air conditioning, but in truth, both undersized and oversized systems can cause serious problems. That’s why working with a qualified HVAC team is essential—not just for the installation itself, but for selecting the perfect size unit to keep your home comfortable and energy-efficient.
Why AC Size Matters
An air conditioner that’s too small for your home will struggle to cool your space effectively, leading to constant cycling, overworked components, and higher energy bills. You might never feel truly comfortable, especially during heatwaves.
On the other hand, an oversized unit may cool the house too quickly, resulting in short cycling. This means the system turns on and off too frequently, which wastes energy and doesn’t allow the AC to properly dehumidify your air, leaving you with a cold but clammy interior.
The Importance of Professional Assessment
Choosing the right AC size is not a matter of guesswork. Our team of experienced HVAC installers will help guide you through this entire process, starting with a professional assessment of your home. This includes evaluating several key factors such as:
- Square footage of your home
- Number of windows and doors and their placement
- Home insulation quality
- Ceiling height
- Sun exposure and shade
- Current ductwork condition (or ductless configuration)
- Number of occupants and appliances generating heat
All these variables influence how much cooling power your home truly needs.
How Technicians Calculate AC Size
HVAC professionals use a method called the Manual J Load Calculation to determine the ideal system size for your home. This industry-standard calculation evaluates all the factors mentioned above to determine your home’s cooling load in BTUs (British Thermal Units) per hour. From there, they can recommend a system with the right tonnage (one ton equals 12,000 BTUs per hour) to match your home’s specific requirements.
For example, while a rough estimate might suggest 1 ton of cooling for every 600–800 square feet, that’s far from the whole picture. A well-insulated home with shaded windows might need less cooling capacity than an older, poorly insulated home of the same size. Only a proper Manual J calculation gives you a truly accurate recommendation.
Get It Right the First Time
A properly sized air conditioner provides reliable comfort, runs more efficiently, lasts longer, and reduces repair costs over time. With a new AC installation, there’s no reason to settle for a one-size-fits-all approach. Let the experts help you make a well-informed decision.
If you’re considering a new air conditioning system, don’t go it alone. Our knowledgeable team will evaluate your home, guide you in selecting the ideal unit, and provide a flawless installation. The right size makes all the difference—and we’re here to get it exactly right.
Contact J&A today, sleep tight tonight!