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Federal Register / Vol. 86, No. 158 / Thursday, August 19, 2021 / Rules and Regulations resources. DOE estimated that technologies exist that could reduce the electricity consumption of fans by as much as 20 percent.30 76 FR 37678, 37680.
In response to the 2011 NOPD, the CA
IOUs commented that commercial and industrial fans and blowers represent a significant potential for energy savings.
To illustrate the potential energy savings, the CA IOUs presented estimates of how different blade designs compare in terms of energy efficiency, noting that some designs i.e., airfoil, backward curved/inclined centrifugal fans and vanaxial axial fans are better than others. CA IOUs, No. 6 at pp. 1
2 In response to the June 2011 NOPD, AHRI commented that systems that includes commercial and industrial fans and blowers are already subject to DOE
energy conservation standards. AHRI
asserted that Part A1s purpose has already been achieved through DOEs energy conservation standards for commercial equipment; the minimum energy efficiency requirements within these standards adequately account for the energy consumption of various components within a system, including fans and blowers. AHRI, No. 3 at pp. 1
2 In response to the January 2013
Framework Document, AHRI added that setting energy conservation standards for fans and blowers used in HVAC
applications would not ensure an optimized energy savings solution for this category of equipment and that ASHRAE Standard 90.1 already includes fan efficiency requirements for certain categories of HVAC fans. Docket No. EERE2013BTSTD0006; AHRI, No. 12 at p. 1 Also, in response to the January 2013 Framework Document, AMCA, EEI, Lennox, commented that DOEs analysis should account for the existing fan efficiency requirements in ASHRAE Standard 90.1. Docket No.
EERE2013BTSTD0006; AMCA, No.
19 at pp. 5, 32; EEI, No. 13 at p. 2;
Lennox, No. 18, at p. 3; Ingersoll Rand/
Trane noted that HVAC equipment that incorporate fans are already subject to minimum efficiency requirements in ASHRAE Standard 90.1. For fans going into these HVAC equipment, Ingersoll Rand/Trane commented that any improvements in the fan energy efficiency would not results in any energy savings as the HVAC equipment would continue to be designed to meet the equipment level metrics required by ASHRAE 90.1. Docket No. EERE2013
BTSTD0006; Ingersoll Rand/Trane, 30 Martin, N., Worrel, E., et al. Emerging Energy Efficient Industrial Technologies, LBNL46990, 10/
2000.

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No. 24, at p. 2 In response to the June 2011 NOPD, CTI also commented that much of the energy savings for standalone fans is already captured in ASHRAE 90.1 and in the International Energy Conservation Code. CTI, No. 13, at p. 2
In response to the May 2021 RFI, AHRI reiterated its concern that the data evaluated in DOEs previous NODA
analyses used a fan database with fan performance characteristics that may not have appropriately represented embedded fans. AHRI, No. 16.2, at p. 5
Greenheck recommended that DOE
reevaluate the potential energy savings for fans based on the new fan energy requirements included in the 2019
version of ASHRAE 90.1, as well as savings obtained from ongoing utility incentive programs, related state energy standards/codes and industry performance certifications programs.
Greenheck, No. 18, at pp. 2, 3
In the November 2016 NODA, DOE
provided estimates of national energy savings that may result from potential energy conservation standards.31 DOE
analyzed six efficiency levels ELs representing lower efficiency fans baseline levelEL0 and higher efficiency fans max techEL6. To develop these efficiency levels, DOE
identified existing technology options that affect efficiency. DOE then conducted a screening analysis to review each technology option and decide whether it: 1 Is technologically feasible; 2 is practicable to manufacture, install, and service; 3
would adversely affect product utility or product availability; or 4 would have adverse impacts on health and safety.
The technology options remaining after the screening analysis consisted of a variety of impeller designs and guide vanes. DOE used these technology options to divide the fan groups into subgroups and conducted a marketbased assessment of the prevalence of each subgroup at the different efficiency levels analyzed. DOE analyzed six efficiency levels in the November 2016
NODA, including one efficiency level representing the efficiency target as recommended by AMCA 32 as well as additional levels above and below. 81
FR 75742, 75748. DOE estimated that technologies exist that could reduce the electricity consumption of a baseline fan 31 The national impact analysis tool and results supporting the November 2016 NODA are available online at https www.regulations.gov/document/
EERE-2013-BT-STD-0006-0192.
32 See AMCAs DOE Fan efficiency Proposal presented at the 59th AMCA Annual Meeting, January 24, 2015.

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by as much as 30 percent,33 resulting in national energy savings ranging from 0.796.96 quads site savings over the 30
year analysis period 2.2 to 19.1 quads Full Fuel Cycle depending on the EL
considered. Docket No. EERE2013
BTSTD0006; National Impact Analysis Spreadsheet, No. 192
Regarding ASHRAE Standard 90.1
and its effect on the current mix of fan and blower efficiencies on the market, DOE considered confidential sales data provided by AMCA in development of fan efficiency distributions for the November 2016 NODA. DOE collected additional technical and market information specific to embedded fans to represent both the embedded fan and standalone fan markets. DOE applied these efficiency distributions to account for the fact that more efficient fans are already on the market when estimating energy savings from potential energy conservation standards. 81 FR 75742, 7575175752.34 Further, since the publication of the November 2016
NODA, the industry standard in ASHRAE Standard 90.1 applicable to fans was revised to include updated fan efficiency requirements corresponding to approximately the stringency level in EL 3 as analyzed in the November 2016
NODA.35 Because ASHRAE Standard 90.1 is approximately as stringent as EL
3 in the 2016 NODA analysis, the figures and analysis from the 2016
NODA can be used to determine remaining potential energy savings, assuming a full implementation of the fan requirements in ASHRAE 90.1. Even assuming full implementation of ASHRAE Standard 90.1, DOE estimates that there would remain a potential for additional energy savings ranging from 0.555.5 quads site energy savings 1.5
to 15.1 quads FFC energy savings over the 30 year analysis period.36
The national energy savings results presented in the November 2016 NODA
33 Based on the difference in fan efficiency targets at EL0 and EL6.
34 The efficiency distributions reflect market shares of fan shipments by efficiency level in the absence of an energy conservation standard. In the November 2016 NODA, DOE assumed that some fans are already being purchased at efficiency levels above the baseline. See LCC Input tab of the national impact analysis tool Row 39 Available at https www.regulations.gov/document/EERE2013-BT-STD-0006-0192.
35 ANSI/ASHRAE/IES Standard 90.12019 IP, Energy Standard for Buildings Except Low-Rise Residential Buildings. Section 6.5.3.1.3 Fan efficiency.
36 To estimate these savings, DOE subtracted the national energy savings estimates at EL3 from the national energy savings estimates as projected by in the November 2016 NODA. The national impact analysis tool and results supporting the November 2016 NODA are available online at https
www.regulations.gov/document/EERE-2013-BTSTD-0006-0192.

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