Self-contained, portable Airmaster air conditioners roll on heavy-duty casters and are UL approved for outdoor operation, making them easier to use in all types of applications, the company says. The units can be used for emergency or back-up cooling, primary or supplemental air con-ditioning, or spot cooling. They come in five sizes ranging from 10,000 to 65,000 Btuh. Flexible air nozzles allow cool air to be directed where it is needed. Optional ducting kits are offered for evaporator and condenser supply and return, as well as drop-in ceiling panels.

Koldwave, Division of Mestek, Inc., 260 N. Elm St., Westfield, MA 01085; 413-564-5520; 413-564-5815 (fax); (website).