If you think about it,
air compressors are extremely simple machines.
They feature a powerful electric motor (or engine) that squeezes air into a steel storage tank.
When the compressed air is released, the pressure produces a gale force wind capable of powering pneumatic tools.
Air compressors come in three unique grades:
Consumer
Consumer-grade air compressors are made for smaller air

needs around the house. If you need to inflate sporting goods, toys and tires and not much more, this is the right grade for you.
Consumer compressors can do more than just inflate things though. They can run air tools without large air needs, such as brad guns and staplers.
However, if you want to run big tools or multiple ones at the same time, you'll need to get a more powerful compressor.

How to Pick The Perfect Consumer Air Compressor
Contractor
Contractor-grade air compressors are built to withstand the

rigors of a job-site. Designed with building professionals in mind, these are portable, either hand-carry, on a wheeled cart or attached to a vehicle.
Contractor-grade compressors can be utilized for a myriad of purposes, but are primarily used to power nail-guns and roadside repair tools.
If you're constantly running multiple air tools and have very large
air demands, look to commercial-grade compressors.

How to Pick the Perfect Contractor Air Compressor