Greenheck’s new 52-page catalog details its line of Model G and GB centrifugal roof downblast exhaust fans, now including the direct drive Vari-Green motor option. Fan performance data is conveniently grouped by model size for easy comparison, and the advantages in speed range and flexibility when using the Vari-Green motor are illustrated. Information on Model G and GB emergency smoke control, seismic, and high wind and hurricane applications and protocols is included. The catalog also features detailed configurations, options and accessories information and typical specifications.