ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 4
as the metric, setting a minimum effi ciency of 65 percent
for fans in ANSI/ASHRAE/IES Standard 90.1, Energy Standard
for Buildings Except Low-Rise Residential Buildings.
The bodies of experts soon realized that a 65-percent
minimum effi ciency would eliminate a large portion
of fans with diameters of 20 in. (50.8 cm), regardless of
how effi cient the fans were in larger sizes. This led to
the development of a new metric, fan-effi ciency grade
(FEG), which establishes bands of effi ciency so that fans,
regardless of size, have the same rating across a model's
effi ciency range. Because it approximated a MEPS of
65 percent, a minimum FEG of 67 was established in
ANSI/ASHRAE/IES Standard 90.1.
Properties of FEG include:
■
Consideration of fan-impeller and bearing losses only-
no motor/drive losses are considered.
■
Consideration of total effi ciency only-static effi ciency
is not a factor.
■ Consideration of full-load operation only.
It occurred to TC 5.1 and SSPC 90.1 that, with FEG
being the same for smaller and larger fans and fi rst-cost
considerations being what they are, system designers
could simply specify smaller fans in the FEG 67 band,
defeating the purpose of the MEPS. Hence, a sizing
window 15 percentage points from peak total effi ciency
was established to nudge fan selections to larger sizes.
FEG was incorporated into ANSI/ASHRAE/IES
Standard 90.1 with the 2013 edition and the International
Energy Conservation Code (IECC) with the 2015
edition. Over time, FEG-based provisions were adopted
into more than 25 state energy codes.
Fan-Regulation History:
Energy Regulations
In June 2011, the DOE initiated a rulemaking for CIFB by
soliciting stakeholders for market data as well as input
on metrics and standards. Less than two years later, in
January 2013, the DOE published a framework document
4
2023 AMCA inmot ion
www.amca.org
http://www.micrometl.com
http://www.amca.org
ASHRAE Journal Supplement - AMCA InMotion - November 2023
Table of Contents for the Digital Edition of ASHRAE Journal Supplement - AMCA InMotion - November 2023
Contents
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - BB1
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - BB2
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - Cover1
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - Cover2
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - Contents
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 2
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 3
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 4
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 5
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 6
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 7
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 8
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 9
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 10
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 11
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 12
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 13
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 14
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 15
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 16
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 17
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 18
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 19
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 20
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 21
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 22
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 23
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 24
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 25
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 26
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 27
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 28
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 29
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 30
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 31
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 32
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 33
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 34
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 35
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 36
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - Cover3
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - Cover4
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