Air Compressor Size Buying Guide

Buying an air compressor is an excellent idea because they are great to have available for home use. This tool could be used for air nail guns, pressure cleaners, spray guns, air wrenches and many other tools you may own. The first thing you need to consider before buying an air compressor is what type of jobs you could use it for and what type of air tools will be used as well. You will definitely want to get a compressor that gives you enough air power, since one that doesn't meet the standard of the air tool you will be using with the air compressor will end up not working properly.

Air compressors are rated on horsepower, pressure and CFM (cubic feet per minute of output at a given tank pressure). Before you buy an air compressor, you should find out how much your air-powered tool(s) require so you can purchase one with the minimum requirements. No need to purchase a huge machine if a small one will do the job.

There are three main types / sizes of air compressors available based on the power and job that you need it for.

Compact Air Compressors: These are the smallest and most portable air compressors available. A compact compressor is different in that it does not have storage tank. They "run" continuously to supply the air. These tools are great for powering tools you may use around the house like glue guns, small spray guns or be used to inflate soccer or basket balls and even tires.

Single Stage Compressors: These air compressors will compress air to store in a tank with one piston. The single stage system is usually on smaller compressors that have a rating below 150 pounds of pressure per square inch (psi). This amount of PSI should be quite adequate for home use.

Two Stage Compressors: These air compressors compress air to storage with two pistons. The first piston's job is to compresses air and push it through a check valve going to the second piston. Then the second piston compresses the air even more and stores it in the tank. This heavy-duty two stage compressor gives you excellent power. Most people use these machines for jobs that need a continuous air supply for a longer period.

Other things to consider when buying an air compressor are what power sources will be available and maintenance requirements of the tool. If you have an electric outlet close to your job site, you may desire to go with an electric powered compressor. For remote jobs, you may wish to purchase a gas-powered compressor. As for regular maintenance, be aware that if you buy an oil-lubricated compressor you will need to change the oil regularly to keep it in good working form.