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.
Louvers are the staple of a plantation shutter. Louver size will determine the amount of light, ventalation and privacy that a room receives as well as how much of a view you have when our louvers are open at 90 degrees. You have the choice of 2-1/2, 3-1/2, and 4-1/2 louvers.