Spot Cooling & Temporary Cooling Since 1985, Spot Coolers has provided temporary and emergency commercial air conditioning units, systems and services for people, equipment,buildings (offices) and companies throughout the nation. We provide the best "on the spot" air conditioning solutions, meeting the cooling and heating needs of our customers in record time. From our air-and water-cooled portables to our trailer-mounted 25-ton units, our emergency service cooling rental fleet will keep you cool. Spot Coolers is the largest portable air conditioning supplier in the United States with 39 locations nationwide. Our portable cooling units and heating systems provide permanent or temporary (rental) solutions for short- and long-term cooling and heating needs.