The company has expanded the range of its portable chillers, increasing the tonnage. The units now run from 20- to 40-ton capacities in the water-cooled and remote air-cooled series, and 20- to 30-ton capacities for the indoor air-cooled models. The indoor air-cooled chillers incorporate centrifugal blowers for higher static pressure in ductwork. Also available for the 20- to 30-ton models are dual refrigerant circuits for higher performance. Other features include choice of single- or dual-pump arrangement. Berg Chilling Systems Inc., 51 Nantucket Blvd., Scarborough, ON, Canada M1P 2N5; 416-755-2221; 416-755-3874 (fax); (e-mail); (Web site).