Specifies how much of the total cross-sectional area on the louvre that air can pass through. The free area can vary greatly depending on the type of louvre to use. Accurate information regarding the free area on the louvre provided by the current louvre manufacturer.
The effective area or net area is the free area converted to m2 for the current louvre.
Displays the current velocity through the grille. A general guideline is that the velocity should not exceed 2-2.5 m/s to minimize the risk of introducing the water and / or snow into the ductwork, which can cause problems such as corrosion of the duct sections and more. To get more accurate figures on recommending work provided by the current vendor.
The great flow that flows through the current louvre.
The width of the current louvre.
The height of the current louvre.