TAB Journal Fall 2020 - 13

Effective duct length 9.5 ft.

FIGURE 2: OUTLET AIRFLOWS

Actual duct length was measured 4.1 ft.

Problem found.

3.	The total flow at the diffusers added
up to almost half the design capacity.

regarding system effect and the effective
duct length required.

When in doubt, review the engineer's
specification; nothing stood out except
for a bold quote stating all ducts should
be suspended as high as possible to
maximize clearance from the generators.
The item in the specification got my
attention, since not long before I was
reviewing the Kahoe field manual

Results:
Velocity is < 2,500 FPM	

Faster. Easier. Safer.

VELOCITY & DUCT SP
SIMULTANEOUSLY
Velocity Grip Handle

for single handed traverse

After discussing the results with the
engineer, we agreed, and the duct was
lowered to obtain 10 ft. of straight
duct from the duct vanes to the fan
inlet. With the duct change, the fan
operated as intended and the airflows
reached design.

AIA
Continuing
Education
Provider

After reading the full
issue, take what you've
learned, visit
www.aabc.com/TABQuiz
and pass the quiz to earn
1 AIA LU.

AIRFLOW

Features:
* Magnetized
* Lightweight
* 30-3000 CFM
* Read up to
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Simultaneously
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E v e r g r e e n Te l e m e t r y. c o m
TAB Journal Fall 2020

13


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TAB Journal Fall 2020

Table of Contents for the Digital Edition of TAB Journal Fall 2020

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TAB Journal Fall 2020 - Cover3
TAB Journal Fall 2020 - Cover4
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