Greenheck has expanded its offerings in Make-up air Models DGX and MSX to now be configured with a direct drive, backward-curved plenum supply fan. Both models offer an operating range capable of 800 - 25,000 cfm and external static pressure up to 4 in. wg. The DGX and MSX with direct drive plenum fans offer additional solutions when an application requires higher external static pressures caused by extensive ductwork or higher efficiency filtration. The factory-mounted variable frequency drive provides an inherent soft-start for the supply fan, while the absence of belts and sheaves reduces maintenance and simplifies air balancing in the field.
Available heating options include direct gas-fired, electric heat, hot water and steam coils; cooling options include split direct expansion, chilled water and evaporative cooling. The new backward-curved plenum supply fan can lead to lower motor horsepower and energy usage when compared to other fan options.