Sizing Guide
Where do you live?
Easy To Use A/C Size Selection Tool:
Check the color coded map above and confirm the zone your home is in. Then, on the chart included underneath, select the square footage of your home along with the zone you're in. From there you can select one of units that will be most efficient for your home.
Proper System Sizing
A lot of real science is included in the methods of calculation when selecting the right size central air conditioner for your home. For instance, one of these methods is a Residential Load Calculation.
Another method for sizing air conditioners is determining the size of the air conditioner system that's currently in place. Manufacturers normally don't list the size of the air conditioner unit but don't worry! The system capacity is almost always coded into the model number of the outdoor unit.
In most cases you can use the conversion information below to help in determining the size of your existing air conditioner system.
Use the system model number NOT the serial number!
18 = 1.5 tons
24 = 2 tons
30 = 2.5 tons
36 = 3 tons
42 = 3.5 tons
48 = 4 tons
60 = 5 tons
24 = 2 tons
30 = 2.5 tons
36 = 3 tons
42 = 3.5 tons
48 = 4 tons
60 = 5 tons
