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Temperature Options
Spark-Resistant Construction Options
The following AMCA Standards apply to fan
applications that may involve the handling of
potentially explosive or flammable particles,
fumes or vapors.
•AMCA Type A - All parts in contact with the
airstream are constructed of nonferrous material
(aluminum). Model SWB does not meet AMCA
Type A spark resistant construction because the
fan shaft is steel.
•AMCA Type B - The fan wheel is constructed
of nonferrous material (aluminum). A nonferrous
(aluminum) rub ring surrounds the fan shaft where
it passes through the fan housing. Available on all
SWB sizes with an aluminum wheel and rub ring.
•AMCA Type C - The inlet cone is constructed
of nonferrous material (aluminum). A nonferrous
(aluminum) rub ring surrounds the fan shaft where it
passes through the fan housing.
The constructions listed minimize the potential of
ferrous components making contact with each other
that may produce sparks. However, they do not
guarantee against the potential of producing sparks.
The installer must electrically ground all fan and
system components.
Testing
High temperature testing was conducted at
Greenheck’s Research and Development facility
with airstream temperatures in excess of 1000°F
(538°C). Temperatures were monitored at the
following critical locations throughout the tests:
bearings, bearing compartment, motor, motor
compartment, airstream and fan housing.
Operating Temperatures
Utility set fans are suitable for applications with
elevated temperature airstreams. Refer to the
chart at the right for operation temperature
guidelines and optional accessories.
High Temperature/Emergency Smoke Control
The SWB Series 200 sizes 212 to 224 and
Series 300 may be equipped for emergency
smoke removal applications by specifying a
high temperature option. The table below right
indicates the construction features included in
the high temperature options enabling exhaust
of heat and smoke at 500°F (260°C) for a
minimum of 4 hours or 1000°F (538°C) for a
minimum of 15 minutes.
High Temperature Option
SWB Series 200 & 300
•500°F(260°C) for a minimum of 4 hours
•1000°F(538°C) for a minimum of 15 minutes
Temperature ratings tested in accordance to UL
smoke control systems.
Emergency Smoke Control - UL Listed
SWB Series 200 & 300
•500°F(260°C) for a minimum of 4 hours
•1000°F(538°C) for a minimum of 15 minutes
High Temperature SWB Features
Series 200 & 300
High
Temperature
Option
High
Temperature
Option with UL
Steel Construction
Shaft Seal
Heat Slinger
Weatherhood
UL Label (Power ventilators for smoke
control systems)
Testing for Emergency Smoke Temperature and Time Guidelines
Code Class Tested Temperature
Time
(Hours)
IRI 500°F
(260°C) 4.00
SBCCI 1000°F (538°C) 0.25
BSI Class A 302°F
(150°C) 5.00
Class B 482°F
(250°C) 2.00
Class C 572°F
(300°C) 0.50
Class D 572°F
(300°C) 1.00
Class E 752°F
(400°C) 2.00
Operating
Temperatures
and Construction
SWB
Series
100
SWB
Series
200
SWB
Series
300
SFD, SFB
Galvanized
Painted
Steel
Aluminum
Airstream
Steel SFD SFB
-20° to 200°F
(-29° to 93°C)
Standard
201° to 300°F
(94° to 149°C)
Heat Slinger/Shaft Seal
301° to 400°F
(149° to 204°C)
Heat Slinger/Shaft Seal
The maximum continuous operating temperature on the SWB is 400°F.
For continuous operating temperatures between 401° and 1000°F use an
Arrangement 1, 9 or 10, backward-inclined centrifugal fan model BISW.