Fan Module: Rosenberg USA
Rosenberg’s new trestle-design GKHB 5.5kW backward curved fan module combines an electronically commutated (EC) motor with the high-efficiency Rosenberg B-Wheel impeller greater efficiency and easy installation. The new B-Wheel Trestle Module features a standard flexible duct connection.
The GKHB Series is available in three impeller sizes; 450 mm, 500 mm, and 560 mm offering maximum airflow of up to 10,000 CFM at free air or 3,000 CFM at up to 7 in of static pressure. Flexible duct connections comply with the customary industrial standard nominal sizes. Applications include data center cooling, HVAC, air handling units, and air quality products.
Rosenberg GKHB backward curved radial fans employ an electronically commutated external rotor motor with integrated power electronics.
The unique B-Wheel impeller features a seven-blade design (instead of the standard eight) in which the blade diameter is smaller than the outside diameter of the cover and support plate, allowing it to act as a rotating outlet diffuser. This new wheel geometry and improved paddle design can increase impeller efficiencies by 6%, up to 78%, while reducing noise by up to four dBA, depending on the application and operating conditions. It also increases airflow compared to standard impellers operating at the same speed, says company officials.