TPI Corporation PM-18S Self Contained Power Mister, 10 Gallon Cooler, Single Phase, 18" Diameter, 120 Volt by TPI. $588.56. Our 18" portable, self-contained, misting fan comes with 10 gallon reservoir cooler. Cart models are also available for easy transportation. With the option for “fan only” or “fan and mist” the possibilities for this little mister are endless!. Save 28% Off!