In general, the discriminant is an algebraic expression that gives. information about the roots of a polynomial. In the case of a quadratic equation the discriminant is the part of. the quadratic equation that is under the radical sign.
How to Select Dampers and Louvers. Dampers and louvers are used to control the flow of air in a process system or enclosed area. Dampers are usually motorized or manually-adjustable for flow control. Louvers are often fixed for a constant flow rate.
The louvers, or slats, of both plantation and traditional shutters are moveable, allowing you to adjust them to regulate the amount of light that enters your home. Plantation shutters have wider louvers, ranging in width from 1 7/8 to 5 Â½ inches. The most common louver widths are 2 Â½, 3 or 3 Â½ inches.