Apr 23, 2018, 18:08 PM

What is louver "free area"?

Link text :

Select a Card/Question Answer : QuestionAnswer

Display order : 32

Free area is the available open area of a louver that is not impeded by the louver components. Louver frame depth, component profiles, louver blade spacing and louver blade angle all play a role in determining the louver free area. AMCA publication 500-L prescribes the method for determining louver free area. A far too often used rule of thumb is “50% free area”. The percentage of free area is not consistent from size to size. This holds true for all manufacturers. As an example, Greenheck model ESD-403 offers 50% free area based on a 48 in. x 48 in. size. The same louver offers only 30% free area for a 12 in. x 12 in. size. The very same louver offers 54% free area for a 120 in. x 120 in. size. Greenheck does not recommend specifying louvers based on an assumed percentage free area.

faqcategories :

• Louvers FAQs

Related pages :