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United Way of Atlanta recently renovated their
eighteen-story Volunteer Services building. In addition to aesthetic
improvements to the office space, the remodel required an HVAC upgrade
from the building’s original perimeter induction system to floor-by-floor
air handling units. Only one floor at a time was being renovated, while
the others remained occupied. The answer was a custom designed Ventrol -
ITF Knock-Down unit.
The space available for a new mechanical room was a 12’ L x 7.5’ W storage
closet, and a shaft area used by an abandoned dumb waiter. Even more
challenging was the limited access. All components needed to fit in a
standard passenger elevator. TBCo worked closely with the engineer and
Ventrol to design a unit that would meet the required capacity of 20,000
cfm and fit in the small space.
 The result was a unit with two separate filter and coil banks and a housed
airfoil fan discharging through the top center of the unit into two elbow
silencers. Because of the very narrow room, the coil headers were rotated
90 degrees (to run in the direction of airflow), so the pipe connections
could be made out of the top of the unit.
The base-frame was designed with internal lifting lugs, so the unit could
be positioned directly against the wall. To fit in the elevator and
through the corridors, the base-frame utilized three de-mounts, and the
fan housing was split. To ensure the unit would fit before the unit was
released for construction, TBCo constructed wood models of the largest
components and moved them through the building to the final unit location.
The entire unit shipped unassembled on five pallets. With Ventrol factory
supervision during unit construction, complete assembly took only two and
one-half days. The fan was field balanced, and the unit ready ahead of
schedule. |
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