Total Power dissipation (Total Heat Load)
in the closet should be calculated to decide on a cost effective method to
solve the problem
Total Heat Load
|
Condition
|
Analysis
|
Action
|
|
< 100W
|
Balance of building is
conditioned space
|
Wall conduction and infiltration will be
sufficient
|
None
|
|
< 100W
|
Balance of building is
hostile space, no HVAC
system
|
Any fresh air from outside the room
cannot be considered safe to use due
to temperature or contaminants
|
Install a self-contained
computer air conditioner in the
closet adjacent to the
equipment
|
|
100 – 500W
|
Dropped ceiling
(overhead) HVAC
system exists, Balance
of building is conditioned
space
|
Fresh air from outside closet will be
sufficient if drawn through, but door
may block air. Bring air in through
door and exhaust to HVAC return
|
Place a return grille in
overhead ventilation system in
top of closet, and place a vent
in bottom half of closet door.
|
|
100 – 500W
|
No access from closet to any HVAC system. Balance of building is
conditioned space
|
Fresh air from outside closet will be sufficient if drawn
through continuously, but no way to get the air.
|
Place an exhaust grille with ventilation fan assist in top
of
door, and place a vent grille in bottom half of closet door.
|
|
500 – 1000W
|
Dropped ceiling
(overhead) HVAC
system exists, Balance of building is conditioned space
|
Fresh air from outside closet will be
sufficient if drawn through
continuously, but door may block air
and continuous fan operation is
required and not assured
|
Place a return grille with
ventilation fan assist in top of
closet, and place a vent in
bottom half of closet door.
|
|
500 – 1000W
|
No access from closet to
any HVAC system.
Balance of building is
conditioned space
|
Fresh air from outside closet will be
sufficient if drawn through
continuously, but no way to get the air.
|
Place an exhaust grille with
ventilation fan assist in top of
door, and place a vent grille in
bottom half of closet door.
|
|
> 1000W
|
Dropped ceiling
(overhead) HVAC
system exists and is
accessible, Balance of
building is conditioned
space
|
Fresh air from outside closet will be sufficient if drawn
directly through the
equipment and no hot exhaust air from the equipment re-circulates to
the
equipment intake
|
Put equipment in an enclosed
rack with a hot exhaust air
scavenging system and place
a vent grille in bottom half of
closet door.
|
|
> 1000W
|
HVAC system is not
accessible, Balance of
building is conditioned
space
|
Moving air through the door is
insufficient, local cooling of the
equipment exhaust air is required
|
Install a self-contained
computer air conditioner in the
closet adjacent to the
equipment
|
