ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 42

A M C A A S I A U P D AT E
from the target efﬁciency for centrif-

example, for axial fans with inlet

outlet diffusers on axial-fan efﬁ-

ugal fans with inlet boxes in tables

boxes, a 3-percentage-point deduc-

ciency, all axial fans with outlet

1 and 2 will be 4 percentage points

tion from the target efficiency in

diffusers will be required to meet

for all grades.

Table 3 will be allowed for each

the requirements in the fan-size-

grade. Additionally:

greater-than-or-equal-to-10 and

There also will be some special
pr ov i sion s for a x i a l f a n s. For

■

In recognition of the impact of

0.55-to-0.75 hub-ratio columns in
Table 3. The target efﬁciency for
axial fans without outlet diffusers
in Table 3, on the other hand, will
be 2 percentage points higher.
■

For dynamic-pitch-angle-adjustable
axial fans without inlet boxes and
diffusers, the limitation on fan efﬁciency for grades 1, 2, and 3 will
be 89.5 percent, 87 percent, and 82
percent, respectively.

■

The target efﬁciency for reversible
axial fans will be allowed to be 8
percentage points lower than the
corresponding value in Table 3.
It should be noted that the 2009

version of the standard deﬁnes termof-service range as the operation
range in which fan efﬁciency is no
less than 90 percent of peak efficiency, or the performance range
speciﬁed in the fan catalog. In the
2020 version of the standard, the
term has been replaced with "stable
operation range."
Standard GB 19761-2020 can be
purchased in English and Chinese
at http://bit.ly/GB_19761-2020.
Mdm SL Goh is executive director
of Asia AMCA.
Asia AMCA's Engineer Associate
program provides access to

®

AMCA's latest publications, standards, news, events, and seminars. To see if you qualify, go to
http://bit.ly/Engineer_Associate.

42

2020 A M CA i n m o t i o n

w w w. a m c a .o r g

http://www.bit.ly/GB_19761-2020 https://berner.com/ http://www.bit.ly/Engineer_Associate http://www.amca.org

ASHRAE Journal Supplement - AMCA InMotion - October 2020

Table of Contents for the Digital Edition of ASHRAE Journal Supplement - AMCA InMotion - October 2020

Contents
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - BB1
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - BB2
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - Cover1
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - Cover2
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - Contents
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 2
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 3
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 4
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 5
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 6
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 7
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 8
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 9
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 10
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 11
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 12
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 13
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 14
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 15
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 16
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 17
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 18
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 19
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 20
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 21
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 22
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 23
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 24
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 25
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 26
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 27
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 28
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 29
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 30
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 31
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 32
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 33
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 34
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 35
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 36
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 37
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 38
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 39
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 40
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 41
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 42
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 43
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 44
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - Cover3
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - Cover4
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