For everything from painting to installing trim, and framing to inflating tires, an air compressor can be one of the handiest pieces of equipment to have around the house. Cost, size and complexity once limited air compressors to professional uses only, but today’s compressors are affordable, easy to use, and offer plenty of power to handle any task you’re likely to encounter.

Gas or Electric? The first thing to consider is whether you want a compressor that is powered by a gasoline motor or an electric one. For most applications, you’re better off with an electric-powered compressor, which is quieter and requires less maintenance than a gas air compressor, and also doesn’t produce fumes. Gas motors have the advantage of being able to be used where there are no electrical outlets, so if you do a lot of work on construction sites, farms or other places where power might not be available, consider a gas-powered compressor.

CFM and PSI: The ability of a particular air compressor to power a particular tool is best determined by two important acronyms — cubic feet per minute (CFM), which is the amount of air the compressor can deliver, and pounds per square inch (PSI), which is the pressure that the air is delivered at. Smaller air tools might take as little as 60 PSI to work, while larger tools such as framing nailers might take 120 PSI or more, so size your compressor accordingly.

Tank Size: The compressed air produced by the pump can either be delivered directly to the air tool, as is the case with very small compressors, or, more commonly, it is delivered to a storage tank. Larger tanks require more run time for the motor and pump to fill the tank, but then they will operate the tools for a longer period of time without the motor coming on again. Typically, lighter compressors used primarily for trim work will have a 2- to 3-gallon tank, while larger, heavier compressors used to power larger tools will be in the 4- to 6-gallon range.

Oil-Lube versus Oil-Less: Oil-lubricated compressors have an accessible oil reservoir and a dip stick for checking oil levels. They tend to run a little cooler, but need to always be on a level surface or the oil won’t properly reach critical parts, and they require regular oil changes. Oil-less compressors have sealed bearings, don’t require any maintenance, are easier to transport, and can be operated off-level without concerns about damage. Either type is fine for most construction and small-shop applications.

Remodeling and repair questions? E-mail Paul at paul2887@ykwc.net.


***


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