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By its design, the SAS "D" always, discharges the air horizontal to the
ceiling which creates the "coanda effect," prevents drafts, and maintains
maximum secondary circulation. Job conditions often change and diffusers
become oversized resulting in the necessity for field adjustments. Opposed
blade dampers, butterfly dampers, and other conventional dampering devices
reduce the discharge velocity and can cause a dramatic effect on the diffuser
performance, as well as increasing the sound level. The optional exclusive
"ring damper" can insure the performance of the air distribution system, and
offer flexibility beyond the design capabilities of standard diffusers.
When the "ring damper" is adjusted from maximum to minimum, the Ak factor will vary. As a result, the adjusted diffuser will still maintain the discharge
pattern, throw and secondary air circulation required to maintain the desired
air distribution.
Optional baffle kits are available to alter the discharge
pattern.
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