How to buy the right size air conditioner

Before you go and buy a new air conditioner, you need to consider some factors that may influence the quality of the air and the efficiency of the air conditioner.

Measuring the room space

Measure the square footage of the room where the air conditioner is going to be installed. This is very important as the square footage gives the right power needed for the air conditioner.

In case you are replacing an old air conditioner, measure the size of the unit.

Window units need a certain space for the unit, so measure the window too if you’re considering buying a window unit.


Every air conditioner has its cooling capacity measured in BTUs (British Thermal Units). For the air conditioner to work at the right efficiency, you should measure the right square footage and then calculate the right BTU. The bigger the space the higher the capacity needs to be. The needed capacity is influenced by the climate in your area and also by the insulation.

For 150 square feet, you will need an air conditioner with a capacity of around 7.500 BTUs. For larger spaces, like 500 square feet, you will need a capacity of 14.000 BTUs. For the right capacity ask your local dealership.

You need to be informed and not be influenced in buying a larger unit than you actually need. Larger or smaller units will end up in an inefficient cooling and also will increase your electric bill.

Easy to move

Another thing you should consider is buying a unit that is easy to install and to move. Maybe you will want to store the unit in the winter time, or to move it to another room.

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