A feature in the design of the ventilation system of the welding shop is the need to achieve high results of purification of air masses with relatively low energy costs.
The five-blade HVLS fan is now available in 4.3-, 5-, 6-, and 7-foot diameter sizes, in addition to the line’s 8- to 14-foot diameter sizes for more design flexibility.
Despite their complex appearance, fan curves are fairly easy to interpret once one gains an understanding of the conventions and terminology used, enabling selection and specification of the best fan for an application.