Chiller Rentals: Chiller Systems & Towers | United Rentals. 440-ton Air-cooled Chiller System, 460V, Electric Powered. Remove up to 440 tons of heat per hour. Unit dimensions 48′ x 8’7″ x 8’6″. Trailer and skid mounted with forklift pockets and lifting eyes for easy on-site positioning. Load limiting capabilities to match power system.