Essick Air 3000-CFM-Speed Outdoor Roof Mount Evaporative Cooler for 1100-sq ft Item #63509 | Model #604012ETOAK The primary difference is that

The primary difference is that hard water minerals are replaced with potassium instead of sodium

TOOL-FREE BLADE RELEASE: Fast and convenient blade changes

Interior/exterior use

Tests DC voltages from 32 to 330V at four levels

Essick Air 3000-CFM-Speed Outdoor Roof Mount Evaporative Cooler for 1100-sq ft Item #63509 | Model #604012ETOAK The primary difference is thatEvaporative cooling is the natural, economical way to beat the heat! Our coolers are built for high performance, easy installation and low maintenance. Evaporative coolers work by drawing hot outdoor air through a cooling pad. The air is cooled by evaporation then circulated into your living work space. Our coolers are built in the USA of heavy gauge galvanized steel that is powder coated for weather and impact resistance. They have bolted