Choosing the right size air conditioner unit makes a big difference. The proper size of the unit will not only effect the temperature for every room in your home, the wrong size unit could cost you money.

A unit that is too large may cool more quickly but may impede the efficacy of the unit’s job.  An AC doesn’t just cool the air, it removes moisture from the air, the humidity, which is what makes us hot and sticky.  Though the air may be cool faster, if the unit doesn’t run long enough the moisture will not be extracted from the air properly.  The AC unit will then cycle on and off more frequently.

Size Matters

This AC Unit is Too Big

A central air conditioner that is too big will not run a full cycle and will cycle on and off more frequently to cool your home and remove moisture. The increased running will cost you more money.

This AC Unit is Too Small

If the central air conditioner is too small, it will end up running constantly because it doesn’t have enough power to cool your entire home.  This will also cost you more money.

This AC Unit is Just Right

A properly sized air conditioner will cool your home efficiently and remove the moisture effectively during its cooling cycle.  The unit will run when necessary, which will save you money on your energy bills.

However, when we talk about the “size” of the unit, we aren’t talking about the actual dimensions of the physical unit, but the cooling capacity.

Calculating the Right Sized Air Conditioner

Selecting the correct size of the air conditioner can be as simple as using a tape measure and a bit of math.

However, there are some other things to consider.  In order to find the best air conditioner for your specific home and your exact needs it is recommended that you contact an HVAC professional.

An HVAC professional can find the right AC for you!  Here at TR Miller Heating and Cooling we can help you get the right unit for your needs with our free estimate services.  Contact us today!

Author

  • brian sloan headshot

    Brian Sloan is the President of TR Miller Heating, Cooling, Plumbing & Electrical, one of the western Chicago suburbs' leading family owned home service companies, serving homeowners across more than 80 communities throughout Will, Kendall, DuPage, Kane, and Cook counties.

    TR Miller is more than a business to Brian, it's a family legacy. The company was founded by his father, Tim Miller, and Brian and his brother Jim have played an important role in growing the business from a small local operation into a full service residential HVAC, plumbing, and electrical company serving homeowners throughout the greater Chicagoland area.

    Brian's perspective on the home services industry comes from firsthand experience. Before taking on leadership responsibilities, he worked in the field as an HVAC Service Technician and Fabrication Technician, diagnosing heating and cooling systems, assembling custom HVAC components, and supporting residential installations throughout the western suburbs.

    That hands on foundation continues to influence the way Brian leads TR Miller today. He understands both the work taking place inside a customer's home and the systems, training, and support required behind the scenes to consistently deliver a great customer experience.

    Over the course of his career at TR Miller, Brian has worked across nearly every major area of the business, including operations, marketing, sales, job coordination, customer service, finance, and leadership. Today, as President, he is responsible for the overall strategy, growth, culture, and performance of the organization.

    That breadth of experience across both the technical and business sides of home services has helped shape how TR Miller operates: combining the systems and accountability of a professionally run organization with the care, responsiveness, and personal connection of a family business.
    Brian's philosophy is straightforward, make home services convenient and reliable while giving homeowners the information they need to make the best decisions for their homes and families. That means educating customers, providing clear options and upfront pricing, and making sure homeowners understand both what was found and why a repair or replacement may be recommended.

    Under Brian's leadership, TR Miller has expanded beyond HVAC into plumbing and electrical services, grown across multiple locations, invested heavily in technical and leadership development, and been recognized seven times on the Inc. 5000 list of America's fastest growing privately held companies.

    Credentials & Affiliations:
    - President, TR Miller Heating, Cooling, Plumbing & Electrical
    - Membership Officer, YPO Chicagoland
    - Board Member, Nexstar Network
    - Former Vice Chair, Board of Directors, Plainfield Shorewood Area Chamber of Commerce
    - Associate's Degree, Waubonsee Community College
    - Former HVAC Service Technician & Fabrication Technician, TR Miller

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