Next-generation controls and variable-frequency drives from Hoffman & Lamson, Gardner Denver Products, optimize the efficiency of new or existing blowers. The controls are engineered with new technologies, yielding cost-effective, flexible and robust systems. Benefits include SCADA-ready panels, meterless flow control, pre-engineered design packages that reduce electrical installation costs and automated monitoring. Horsepower consumption is lower, as only the blower output decreases while the optimal efficiency remains the same as at full speed. 724/239-1500; www.hoffmanandlamson.com.