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Single & Double Deflection Adjustable Grilles
(SDG & DDG) - Air Stream Drop Assessment

Project a line between the known Throw and Jet Velocity. Drop due to spread is directly related to Throw. Drop due to Temperature Differential (T.D.) can be determined by projecting a line from the known Temperature Differential through the point of intersection of line P-P.
Total Drop = Drop due to spread + Drop due to T.D.

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Example

Throw
Jet Velocity
Temperature
Differential		 = 8m
= 3m/sec

= 10 deg C
Reading Directly:-

Drop due to spread = 1m		 By Projection:-

Drop Due to
Temperature differential =2.3m
Total Drop = 1m = 2.3m = 3.3m