Profile: General Shelters manufactures many products. These products range from those used primarily in agricultural and horticultural applications, to mobile, modular and portable buildings, cargo trailers and many variations of evaporative cooling products. Our cooling division manufactures PortA-Cool® portable evaporative cooling units, Küül® pads cooling media and offers also custom rotational molding. Port-A-Cool® units are available in four sizes and electric, pneumatic or hazardous location models.