Cool-Space Portable Evaporative Coolers from Advanced Radiant Systems can provide large drops in temperature, making any shop a more comfortable environment. The Coolers come in two sizes to choose from, a 16" unit for up to 500 sq. ft and the 36" unit for up to 3,000 sq. ft, plugs into a standard 115V outlet and hooks up to a water source, such as a garden hose. All Coolers come with 8" thick pads and an extra large reservoir allows for 4 to 8 hours of run time. Cool-Space offers two-year warranty on all components and a three-year warranty on the variable speed motor.