0% Financing with Approved Credit
Accepted Credit Cards
We accept all major credit cards

The air conditioner that cools a 700 square-foot apartment doesn’t have the capacity to keep up in a 1400 square-foot house. But how do you tell which units can handle your home, and which ones can’t?

For that, you’ll need to find the air tonnage of your unit. In this post, we’ll explain what that means exactly, and how you can identify it on your air conditioner:


What is Air Tonnage?

The amount of heat that your air conditioner can remove from your home is described by its air tonnage.

  • If your air conditioner has too little air tonnage, it won’t be able to cool your home on a hot, summer night in Texas.
  • If it has too much tonnage, it will short cycle (meaning that it turns on and off rapidly, which wastes energy, diminishes its ability to dehumidify the air, and damages the unit).

How much air tonnage do you need for your home? The number will directly correspond to how many square feet make up your home. A few other factors are how well-insulated your home is and how tall the ceilings are.

An AC term that you may be more familiar with is BTU (British thermal unit). One unit describes the heat that will warm a pound of water by 1°F

When it comes to air conditioners, BTUs are a handy measurement that indicates how much heat your air conditioner can cool per hour. For every 12,000 BTU/hr that your unit can cool, it has 1 ton of air tonnage. Just divide the BTUs by 12,000 to find out the tons of your AC!

  • Here’s an example: An air conditioner with a capacity of 24,000 BTU/hr is a 2 ton unit.

To break that down even further, we need to consider if your unit has enough capacity for your space. Many specific factors affect the performance of your air conditioner, meaning that there’s no “one size fits all” formula for square footage. In general, you can multiply the square footage by 20 to get the required BTU/hr, then divide it by 12,000 to get the air tonnage.

  • Let’s say you live in a 600 square-foot apartment. Multiply that by 20, and you’ll require 12,000 BTUs. When we divide the BTUs by 12,000, we end up with 1. That means you’ll need a 1 ton air conditioner. 


How to Find it

First, locate your air condenser. This is the part of your unit that’s located outside your home. Look for the label on your air conditioner. If you’re lucky, it will list the tons directly on the label. However, it may only list the BTU rating, in which case you’ll need to apply the formula that we mentioned earlier.

If you can’t see either number on the label, find the model number. You can look it up online and find out the specifications of your unit. Alternatively, call our HVAC technicians at Classic Services. We can help you identify your unit and tell you its cooling capacity. 


Need Help?

This post may have included a lot more math than you were expecting. But don’t worry: at Classic Services, we can do the work for you.

We offer AC repair in New Braunfels. Whether your old unit needs a tune-up, or you need a new one installed, we have you covered. Give us a call!

See What Our Customers Are Saying

Impeccable Quality and Professionalism…

Had them install our system when building and multiple other contractors commented on the impeccable quality and professionalism of their work and staff. Worked with them on another building project and had equally great service and quality. Used them on a service call and Mitchell was very timely, efficient, and professional. Provided explanation in detail of what had happened and fixed it quickly. VERY impressed with this company and would recommend to ANYONE in need of a system install or repair service.

Rebekah Ashworth

We are so glad we found this company!

Kurtis has been very responsive to our AC and heat issues. You don’t have to worry about not getting a call back. He’s consistent with customer service and does very professional work. We are so glad we found this company!

Dina Green

I Knew I Made the Right Choice from the Word Go

Kurtis Hall dealt square and honest every step of the way. His knowledge of our dated system, new product information, project scheduling and communication allowed for a seamless installation at our vacation property without my having to interrupt my work schedule to accommodate the project. And living over 5 hours away that was a huge help to me. I knew I made the right choice from the word go. Excellent job Mr Hall! Will recommend your company to others!

Sam Mckee

Sooooo honest! Saved me $2,200!

Ask for Kurtis! Sooooo honest! Fixed the issue instead of trying to sell what I didn’t need. He was the 3rd estimate for my ac problem. Turned out I don’t have a major problem. I’m so thankful he saved me $2,200! Extremely trustworthy!Kim T from NB

Kim Thompson

Thank You So Much for Recommending the Air Scrubbers

I just wanted to tell you how happy we are with the air scrubbers.  The air is so clean and the dust has really gone away.  I highly recommend them.  Again, thank you so much for recommending the air scrubbers.

Jennefer Reardon

Friendly, Informative, and Efficient

My wife and I are so pleased with your company. Kurtis Hall is great! He is so friendly, informative, and efficient. You should be very proud of him -- we sure are.

David Vaughan

Call us today!

Classic Services AC & Heating

1893 State Highway 46 South, New Braunfels, TX 78130, United States

View our

Service Areas

Follow Us