ASHRAE Journal - December 2023 - 61
Fan Energy Index (FEI):
A True Energy Effi ciency Metric
Incorporating the Fan Energy Index (FEI) metric during the design phase of a building project can help design engineers meet or
exceed energy codes while optimizing fan performance. Based on ANSI/AMCA Standard 214, a fan's FEI value represents how
effi ciently the fan performs at a specifi c duty point relative to a baseline fan. Values over 1.00 indicate the fan is more effi cient
than the baseline. For example, a fan with an FEI of 1.10 is 10% more effi cient than the baseline fan. If your state or local code
adopts ASHRAE 90.1 language, fans must have a minimum FEI of 1.00. If the fan's FEI value is 0.85 it is not an acceptable
option as it consumes more electrical input power than the baseline fan would.
Static Pressure and Sound
In addition to fan performance and code compliance, by
optimizing FEI, the fan selection ends up being more central
in the fan curve. (Figure 1) This provides a level of protection
against unforeseen static pressure impacts in the fi eld. A less
effi cient fan may be selected closer to the max RPM line on
the curve and could result in underperformance if the actual
static pressure exceeds what was calculated during the
design. Figure 1 also illustrates how the FEI increases as the
fan speed decreases. This can often translate to quieter fan
operation, providing additional protection against unwanted
noise levels in sound-sensitive applications.
High Efficiency Fan
Peak Efficiency
FEI 1.1
FEI 1.2
FEI 1.0
FEI 0.1
Figure 1 Compliant range of operation of a fan operating at multiple speeds
Airflow
Optimize Performance
Specify Greenheck
Greenheck's eCAPS®
To optimize FEI for a given fan selection,
schedule the FEI value for all fans greater than
1 hp and include a note that reads " FEI must
meet or exceed scheduled value. "
online Engineer Application Suite
provides AMCA-certifi ed FEI values for all applicable fan
models to aid in the selection of code-compliant products.
Models SQ and KSQ are the latest fan models that are AMCA
Licensed for FEI, Sound and Air Performance. Model SQ
is a direct drive mixed fl ow inline fan for supply, exhaust,
return, or make-up air systems in indoor or outdoor spaces.
The KSQ is a mixed fl ow roof supply fan that provides
energy-effi cient building supply or untempered make-up air
in applications where heating or cooling are not required.
Both models offer optimized energy effi ciency while reducing
sound and footprint.
For more information, contact your local Greenheck
representative today! Greenheck.com/fi nd-my-rep
P.O. Box 410 * Schofield, WI 54476
715.359.6171 * greenheck.com
Static Pressure
http://www.Greenheck.com/fi
http://www.greenheck.com
ASHRAE Journal - December 2023
Table of Contents for the Digital Edition of ASHRAE Journal - December 2023
Contents
ASHRAE Journal - December 2023 - Intro
ASHRAE Journal - December 2023 - BB1
ASHRAE Journal - December 2023 - BB2
ASHRAE Journal - December 2023 - Cover1
ASHRAE Journal - December 2023 - Cover2
ASHRAE Journal - December 2023 - 1
ASHRAE Journal - December 2023 - Contents
ASHRAE Journal - December 2023 - 3
ASHRAE Journal - December 2023 - 4
ASHRAE Journal - December 2023 - 5
ASHRAE Journal - December 2023 - 6
ASHRAE Journal - December 2023 - 7
ASHRAE Journal - December 2023 - 8
ASHRAE Journal - December 2023 - 9
ASHRAE Journal - December 2023 - 10
ASHRAE Journal - December 2023 - 11
ASHRAE Journal - December 2023 - 12
ASHRAE Journal - December 2023 - 13
ASHRAE Journal - December 2023 - 14
ASHRAE Journal - December 2023 - 15
ASHRAE Journal - December 2023 - 16
ASHRAE Journal - December 2023 - 17
ASHRAE Journal - December 2023 - 18
ASHRAE Journal - December 2023 - 19
ASHRAE Journal - December 2023 - 20
ASHRAE Journal - December 2023 - 21
ASHRAE Journal - December 2023 - 22
ASHRAE Journal - December 2023 - 23
ASHRAE Journal - December 2023 - 24
ASHRAE Journal - December 2023 - 25
ASHRAE Journal - December 2023 - 26
ASHRAE Journal - December 2023 - 27
ASHRAE Journal - December 2023 - 28
ASHRAE Journal - December 2023 - 29
ASHRAE Journal - December 2023 - 30
ASHRAE Journal - December 2023 - 31
ASHRAE Journal - December 2023 - 32
ASHRAE Journal - December 2023 - 33
ASHRAE Journal - December 2023 - 34
ASHRAE Journal - December 2023 - 35
ASHRAE Journal - December 2023 - 36
ASHRAE Journal - December 2023 - 37
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ASHRAE Journal - December 2023 - 40
ASHRAE Journal - December 2023 - 41
ASHRAE Journal - December 2023 - 42
ASHRAE Journal - December 2023 - 43
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ASHRAE Journal - December 2023 - 45
ASHRAE Journal - December 2023 - 46
ASHRAE Journal - December 2023 - 47
ASHRAE Journal - December 2023 - 48
ASHRAE Journal - December 2023 - 49
ASHRAE Journal - December 2023 - 50
ASHRAE Journal - December 2023 - 51
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ASHRAE Journal - December 2023 - 53
ASHRAE Journal - December 2023 - 54
ASHRAE Journal - December 2023 - 55
ASHRAE Journal - December 2023 - 56
ASHRAE Journal - December 2023 - 57
ASHRAE Journal - December 2023 - 58
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ASHRAE Journal - December 2023 - 60
ASHRAE Journal - December 2023 - 61
ASHRAE Journal - December 2023 - 62
ASHRAE Journal - December 2023 - 63
ASHRAE Journal - December 2023 - 64
ASHRAE Journal - December 2023 - 65
ASHRAE Journal - December 2023 - 66
ASHRAE Journal - December 2023 - 67
ASHRAE Journal - December 2023 - 68
ASHRAE Journal - December 2023 - 69
ASHRAE Journal - December 2023 - 70
ASHRAE Journal - December 2023 - 71
ASHRAE Journal - December 2023 - 72
ASHRAE Journal - December 2023 - 73
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ASHRAE Journal - December 2023 - 75
ASHRAE Journal - December 2023 - 76
ASHRAE Journal - December 2023 - 77
ASHRAE Journal - December 2023 - 78
ASHRAE Journal - December 2023 - 79
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ASHRAE Journal - December 2023 - 81
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ASHRAE Journal - December 2023 - 83
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ASHRAE Journal - December 2023 - 85
ASHRAE Journal - December 2023 - 86
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ASHRAE Journal - December 2023 - 89
ASHRAE Journal - December 2023 - 90
ASHRAE Journal - December 2023 - 91
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ASHRAE Journal - December 2023 - 94
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ASHRAE Journal - December 2023 - 97
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ASHRAE Journal - December 2023 - 101
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ASHRAE Journal - December 2023 - 103
ASHRAE Journal - December 2023 - 104
ASHRAE Journal - December 2023 - 105
ASHRAE Journal - December 2023 - 106
ASHRAE Journal - December 2023 - 107
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ASHRAE Journal - December 2023 - 109
ASHRAE Journal - December 2023 - 110
ASHRAE Journal - December 2023 - 111
ASHRAE Journal - December 2023 - 112
ASHRAE Journal - December 2023 - 113
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ASHRAE Journal - December 2023 - 116
ASHRAE Journal - December 2023 - 117
ASHRAE Journal - December 2023 - 118
ASHRAE Journal - December 2023 - 119
ASHRAE Journal - December 2023 - 120
ASHRAE Journal - December 2023 - Cover3
ASHRAE Journal - December 2023 - Cover4
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