Air Movement and Control Association Fan Rating
The centrifugal fan performance tables provide the fan revolutions per minute (RPM) and brake horsepower requirements for the given CFM and static pressure at standard air density (0.075 pounds per cubic foot). When the centrifugal fan performance is not at standard conditions, the performance must be converted to standard conditions before entering the performance tables. Centrifugal fans rated by the Air Movement and Control Association (AMCA) are tested in laboratories with test setups that simulate installations that are typical for that type of fan. Usually they are tested and rated as one of four standard installation types as designated in AMCA Standard 210.
AMCA Standard 210 defines uniform methods for conducting laboratory tests on housed fans to determine airflow rate, pressure, electric power and energy efficiency, at a given speed of rotation. The purpose of AMCA Standard 210 is to define exact procedures and conditions of fan testing so that ratings provided by various manufacturers are on the same basis and may be compared. For this reason, fans must be rated in SCFM.
Read more about this topic: Actual Cubic Feet Per Minute
Famous quotes containing the words air, movement, control, association and/or fan:
“A hook shot kisses the rim and
hangs there, helplessly, but doesn’t drop
and for once our gangly starting center
boxes out his man and times his jump
perfectly, gathering the orange leather
from the air like a cherished possession”
—Edward Hirsch (b. 1950)
“I am a writer and a feminist, and the two seem to be constantly in conflict.... ever since I became loosely involved with it, it has seemed to me one of the recurring ironies of this movement that there is no way to tell the truth about it without, in some small way, seeming to hurt it.”
—Nora Ephron (b. 1941)
“We long for our father. We wear his clothes, and actually try to fill his shoes. . . . We hang on to him, begging him to teach us how to do whatever is masculine, to throw balls or be in the woods or go see where he works. . . . We want our fathers to protect us from coming too completely under the control of our mothers. . . . We want to be seen with Dad, hanging out with men and doing men things.”
—Frank Pittman (20th century)
“The spiritual kinship between Lincoln and Whitman was founded upon their Americanism, their essential Westernism. Whitman had grown up without much formal education; Lincoln had scarcely any education. One had become the notable poet of the day; one the orator of the Gettsyburg Address. It was inevitable that Whitman as a poet should turn with a feeling of kinship to Lincoln, and even without any association or contact feel that Lincoln was his.”
—Edgar Lee Masters (1869–1950)
“A matchmaker after a wedding is like a fan after autumn.”
—Chinese proverb.