Greenheck Fan Mixed Flow Fans Belt and Direct Drive QEI-L - Manual (Page 13)

13
Roof Upblast & Spark Resistant
Construction
Roof Upblast
Models QEI-I/II sizes 9 through 54 and model QEID
sizes 12 through 54, are available in roof upblast
configuration. The roof upblast configuration is ideal
for exhausting contaminants away from a building to
prevent roof damage and re-entrainment of exhaust
air. Both QEI-I/II roof upblast models have the high
temperature UL rating and can be used for emergency
smoke exhaust applications.
Standard construction includes a fully-welded heavy-
gauge curb cap to eliminate leaks, a butterfly damper
section for backflow prevention, and a windband
section to protect the butterfly dampers from debris. A
complete line of roof curbs is available for mounting to
a roof deck.
Spark Resistant Construction
Greenheck mixed flow fans are available with spark
resistant designs suitable for applications that involve
flammable particles, fumes or vapors. Spark resistant
construction options adhere to guidelines defined
within AMCA Standard 99-0401-10.
QEI-I/II Spark B
The fan wheel is constructed of a
nonferrous material (aluminum).
A non-ferrous (aluminum) bearing
cover surrounds the driven bearing,
shielding it from the airstream.
QEI-I/II
QEI-L
Spark C
The inlet cone is constructed of
non-ferrous material (aluminum).
A nonferrous (aluminum) bearing
cover surrounds the driven bearing
shielding it from the airstream.