Voglio sapere a riguardo di…

24532

Federal Register / Vol. 86, No. 87 / Friday, May 7, 2021 / Proposed Rules TABLE III.2CIRCULATOR PUMPS DISTRIBUTION CHANNELS AND RESPECTIVE MARKET SHARESContinued Channel: From manufacturer
Residential shipments share %

Commercial shipments share %

Sales Rep Distributor Contractor End User
Distributor End User
Sales Rep Distributor End User
OEM Contractor End User
OEM Distributor Contractor End User

73
2
12
13

36
2
12
13

Total

100

100

DOE requests information on whether there have been market changes since the CPWG that would affect the distribution channels and the percentage of circulator pump shipments in each channel and sector, as shown in Table III.2, and if so, how such market changes would affect the circulator pump distribution channels.
DOE also requests information on whether the same distribution channels and associated breakdowns across sectors apply for SVIL pumps, and if not, DOE requests relevant data on the SVIL distribution channels and their market shares.
E. Energy Use Analysis As part of the rulemaking process, DOE conducts an energy use analysis to identify how products are used by consumers, and thereby determine the energy savings potential of energy efficiency improvements. DOE will base the energy consumption of circulator pumps and SVIL pumps on the rated annual energy consumption as determined by the DOE test procedure.
Along similar lines, the energy use analysis is meant to represent typical energy consumption in the field.
1. Consumer Samples and Market Breakdowns To estimate the energy use of products in field operating conditions, DOE typically develops consumer samples that are representative of installation and operating characteristics of how such products are used in the field, as well as distributions of annual energy use by application and market segment. According to manufacturer feedback, there are two main applications for circulator pumps:
Hydronic heating and hot water recirculation. DOE estimated the market
share of these two applications based on manufacturer-provided circulator pump shipments data for 2015, as well as the market distribution of circulator pumps in the residential and commercial sectors based on the horsepower ratings of the shipments data and industry expert input.
To develop consumer samples, the CPWG relied on the Energy Information Administrations EIA 2009 residential energy consumption survey RECS and the 2012 commercial buildings energy consumption survey CBECS, for the residential and commercial sectors, respectively. Docket No. EERE2016
BTSTD0004, No. 46 at p. 158 In a potential energy conservation standards rulemaking for circulator pumps and SVIL pumps, DOE may utilize the most current versions of the RECS and CBECS
consumer samples, currently the 2015
RECS and the upcoming 2018 CBECS.
DOE requests data and information on whether the breakdowns of circulator pumps by sector and application have changed since the CPWG proceedings, and if so, how. DOE also requests information on the market applications of SVIL pumps and how those are broken down by sector.
As discussed in section II.A.1.b of this document, the CPWG recommended a definition for on-demand circulator pumps. Docket No. EERE2016BT
STD0004, No. 98 Non-Binding Recommendation 1 at pp. 45 In order to consider analyzing on-demand circulator pumps, DOE requires information to characterize their market size. The CPWG reported that ondemand circulator pumps comprise 5
percent of the hot water recirculation market. Docket No. EERE2016BT
STD0004, No. 46 at p. 168
DOE requests feedback on whether there have been market changes since
the CPWG meetings that would warrant a different estimate of the fraction of circulator pumps sold with on-demand controls, and if so, what that fraction is.
2. Operating Hours To develop annual energy use estimates, the CPWG reviewed the operating hours of circulator pumps by sector residential and commercial and application hydronic heating and hot water recirculation. For hydronic heating applications in the residential sector, operating hours per year HPY
were estimated based on two field metering studies: A 2015 Vermont study and a 20122013 metering study in Ithaca, NY.12 Based on these metering studies, the CPWG suggested establishing a relationship between residential sector heating degree days HDDs and circulator pump HPY to develop operating hour estimates for the hydronic heating application. For the residential sector, this scaling factor was 0.33 HPY/HDD. Docket No. EERE
2016BTSTD0004, No. 100 at pp. 54, 108. For the commercial sector, the CPWG recommended a scaling factor of 0.45 HPY/HDD. Docket No. EERE
2016BTSTD0004, No. 100 at pp.
122123. These scaling factors were used to develop distributions of circulator pump operating hours across the consumer samples. The weighted average HPY for the hydronic heating application were estimated at approximately 1,970 and 2,200 for the residential and commercial sector, respectively.
For circulator pumps used in hot water recirculation applications, the CPWG agreed to HPY estimates based on their associated control types Docket No. EERE2016BTSTD0004, No. 60
at p. 74, as shown in Table III.3.

12 For more information on the Ithaca, NY study, see https www.nrel.gov/docs/fy14osti/60200.pdf.

VerDate Sep<11>2014

17:32 May 06, 2021

Jkt 253001

PO 00000

Frm 00020

Fmt 4702

Sfmt 4702

E:FRFM07MYP1.SGM

07MYP1