Quiet & efficient, inline, Mixed flow fans – Greenheck Fan Mixed Flow Fans Belt and Direct Drive QEI-L User Manual
Page 2
Model QEI-L – Belt Drive
•	 11	sizes	available	(12	thru	36)
•	 Volume	Range:	 700	-	40,000	cfm		
(1190 - 67,960 m
3
/hr)
• Static Pressure: Up to 5 in. wg (1245 Pa)
2
Quiet & Efficient, Inline
• Performance as cataloged is assured. All sizes are
licensed	to	bear	the	AMCA	Certified	Sound	(both	
inlet	and	outlet)	and	Air	Performance	Seal.
• All sizes are tested before they leave the factory to
ensure trouble-free operation at the jobsite.
• Compact size and a “Universal Mounting System”
make	tight	space	considerations	and	last	minute	
mounting	changes	easy	to	handle	at	the	jobsite.
• The belt drive models use air handling quality
bearings	that	are	100%	inspected	for	swivel	torque,	
noise	levels,	and	bore	tolerances.
• These products are subjected to extensive life cycle
testing, assuring many years of reliable performance.
Model QEID – Direct Drive
•	 15	sizes	available	(12	thru	54)
•	 50	-	100%	wheel	widths
•	 Volume	Range:	 800	-	83,000	cfm		
(1,360 - 141,000 m
3
/hr)
• Static Pressure: Up to 10.5 in. wg (2370 Pa)
Model QEI-I/II – Belt Drive
•	 17	sizes	available	(9	thru	60)
•	 Two	classes	of	construction
•	 Volume	Range:	 500	-	115,000	cfm	
(850 - 195,386 m
3
/hr)
•	 Static	Pressure		
	 Up	to	5	in.	wg	(1245	Pa)	Class	I
	 Up	to	8.5	in.	wg	(2120	Pa)	Class	II
Patented (QEI/QEID): USA Patent No. 7048499
China (P.R.) Patent No. CN1294361C
Mexico Patent No. 243465
Typical Mixed Flow Applications:
Recommended	for	any	ventilation	application	that	
requires	low	sound	and	high	efficiency,	such	as	office	
buildings,	parking	garages,	concert	halls,	libraries,	
and	educational	facilities.
Greenheck Fan Corporation certifies
that the model QEI-L, QEI-I/II and
QEID shown herein are licensed to
bear the AMCA Seal. The ratings
shown are based on tests and
procedures performed in accordance
with AMCA Publication 211 and
AMCA Publication 311 and comply
with the requirements of the AMCA
Certified Ratings Program.
For QEID performance showing AMCA licensed data
for sound and air performance, please refer to the
QEID Sound and Air Performance Supplement found
on our website at www.greenheck.com.
Mixed Flow Fans
Mixed	flow	inline	fans	can	be	used	for	supply,	exhaust,	
or	return	air	installations.	Our	patented	design	excels	
in	commercial	applications	where	low	sound	is	critical.	
In	addition,	Greenheck’s	mixed	flow	fans	are	more	
efficient	than	comparably	sized	tubular	centrifugal	
and	vane	axial	fans,	thus	reducing	the	required	motor	
horsepower	and	lowering	operating	costs.
Greenheck’s mixed flow fans are the quietest tubular 
inline fans in the industry!
See page 10 for details.
UL/cUL Listed
QEI-L QEI-I/II QEID
705 - Electrical
Emergency Smoke Evacuation
762 - Restaurant Grease Exhaust