Mars Air Doors, Gardena, Calif., will show its newly expanded lineup of electrically heated units to the commercial/industrial segment. These heated air curtains fit into doors from 36-144-in. wide. Dynaforce, a Mars Air Systems division, will show design innovations involving static efficiency, with more power available at lower noise levels yet at reduced horsepower. Another division, ARES, will show commercial and light industrial make-up air units, including an indirect-fired, electric and hydronic line with capacity reaching 1,200 MBh and 16,000 cfm. All are at Booth #2128.