How to Read the Tonnage on Your AC Unit…


This is a continuation of a previous post by Michael Thornton, a Tennessee home inspector, about how to know the size of an air conditioning unit.  I learned something today from reading this post and I thought I’d share it.

Via Michael Thornton – Nashville, TN area Home Inspector – 615.661.0297 (Complete Home Inspections, Inc.):

How to Read the Tonnage on Your AC Unit…
     One of the questions that many folks asked on yesterday’s post, was how does one know the tonnage of their air conditioning system. On the system’s model number there will be a number: 18, 24, 30, 36, 42, 48, 60. Take this number and divide by 12. This will give the tonnage. i.e. 1.5, 2, 2.5, 3, 3.5, 4, 5.
     The only variation in this numbering scheme will be the newer Puron units. The manufacturers decided to make the evenly divisible numbers one more or one less. i.e. a 2 ton unit may have a model number that reads XXXX23 or XXXX25. Engineers, gotta luv ’em..

Typical model/serial number for AC unit

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About susanmorrison

After living in Walpole, MA for many years, our family was transferred to the west coast when I was a senior in high school. In 1983, I graduated from Mission San Jose High School in Fremont, California. I am also a 1987 graduate of Providence College with a major in liberal arts and a minor in business administration. I bring to the table many years of sales experience beginning with thirteen years in Corporate Sales at Delta Air Lines. I'm the mother of three children and I'm very active within the Franklin, MA community. I am also a cancer survivor and support the American Cancer Society Charities.

My husband and I have built five homes and I've lived in a variety of other locations including Toronto Canada, Irving Texas and my current home in Franklin, MA. As a result of all my moving around, I came to the conclusion that I was an expert at moving...why not become an expert on the other side of the table? I earned my real estate license in 2004 and believe that I have found my true niche'. I can empathize with my clients on a variety of levels; whether they are buying or selling. And, like so many other good realtors out there, I believe that possessing good communication skills is one of the many keys to success.

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