The new, high-temperature Tri-Stack fans are designed for furnace-boiler exhaust, jet engine testing, diesel generator exhaust, and many other high temperature applications, says the company. The fans are designed to operate at temperatures up to 750˚F. The company says its Tri-Stack systems are part of its Generation III systems, which have been in use for nearly two decades for roof and laboratory fume hood exhaust applications in universities, hospitals, and government facilities, as well as for industrial applications. The fans are designed to dilute exhaust air to achieve a 3,000 fpm exhaust velocity, it says. — Strobic Air Corp., a subsidiary of Met-Pro Corp. Harleysville, PA