The R-Series direct gas-fired heaters provide customers with an extremely energy-efficient method to heat and ventilate commercial and industrial facilities, the manufacturer states. The heaters use 15-percent outside air and a backward-incline airfoil plenum fan. In combination with improving indoor air quality for industrial and commercial facilities, these units use less gas and electricity than other systems, the company claims.

AbsolutAire Inc., 5496 N. Riverview Dr., Kalamazoo, MI 49004; 800-804-4000;

eProduct #197