The Q-Tec classroom packaged air conditioner is also suitable for other applications where internally mounted equipment is preferred over external, wall-mounted equipment. The unit is available in 2-, 21⁄2-, 3-, 31⁄2-, 4-, and 5-ton nominal capacities, and all “QA” models are ARI certified and UL listed. Other features include scroll compressors and variable-speed ECM blower motors with SEER ratings range from 10.0 to 12.5.