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Federal Register / Vol. 86, No. 134 / Friday, July 16, 2021 / Proposed Rules a. Dedicated Condensing Systems and Unit Coolers For the July 2017 ECS final rule, DOE
initialized its stock and shipments model for low-temperature dedicated condensing equipment and unit coolers
based on shipments data provided by stakeholders.41 82 FR 31808, 31847.
These data did not explicitly state the share of medium-temperature dedicated condensing units and were inferred from both the fraction of low-

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temperature dedicated condensing equipment for various applications, and from medium-temperature unit cooler shipments. Walk-in shipments data used in the July 2017 ECS final rule analysis are summarized in Table II.18.

TABLE II.18ESTIMATED CONDENSING SYSTEM AND UNIT COOLER SHIPMENTS, 2020
Units Equipment class DC.L.I
Dedicated Condensing Unit Only
Field Paired Dedicated Condensing Systems and Unit Coolers
Unit Coolers Only connected to Dedicated Condensing Units
Unit Coolers Only connected to Multiplexing Condensing Units

DC.L.O

UC.L

DC.M.I

DC.M.O

UC.M

3,202

4,075

6,459

11,481

14,943

19,019

30,141

53,586

7,277

17,941

11,635

20,459

These data showed that:
4 percent of shipments were manufacturer-matched dedicated condensing units and unit coolers manufacturer matched-paired, and the remaining 96 percent were sold as individual dedicated condensing units or unit coolers that installers matched in the field stand-alone, and field-paired;
82 percent of low-temperature unit coolers were paired with dedicated condensing systems, and the remaining 18 percent were paired with multiplex systems. With respect to mediumtemperature unit coolers, 85 percent of these were paired with dedicated condensing systems while the remaining 15 percent were paired with multiplex systems; and 46 percent of low-temperature dedicated condensing systems were installed indoors with the remaining 54
percent installed outdoors. Among medium-temperature dedicated condensing systems, 36 percent of these were installed indoors with the remaining 64 percent installed outdoors.42
These shipments estimates are exclusive of single-package refrigeration systems, high-temperature freezers, and wine cellar refrigeration systems
described in sections II.A.2 through II.A.4 of this document.
Issue 40: DOE seeks input from stakeholders on whether the shipments shown for low-temperature dedicated condensing equipment and unit coolers are still relevant. Further, DOE seeks data on the annual shipments of lowtemperature single-package refrigeration systems see section II.A.3 of this document and the distribution of rated capacities as shown in Table II.15 of this document.
Issue 41: DOE seeks input from stakeholders on whether the shipments shown for medium-temperature condensing equipment and unit coolers reflect the state of the current market.
Issue 42: DOE seeks data on the annual shipments of mediumtemperature single-package refrigeration systems see section II.A.3 of this document, high-temperature freezers see section II.A.2 of this document and wine cellar refrigeration systems see section II.A.4 of this document and the distribution of rated capacities of each Btu/h. DOE also seeks data on the fraction of high-temperature freezers and wine cellar refrigeration systems that are sold as single-package, manufacturer matched-pair or split systems. Additionally, DOE requests
data on the relative market size of refrigeration systems used in high temperature freezers compared to the refrigeration system market sizes for cooler applications i.e., temperature greater than 32 F and low-temperature e.g., less than or equal to 10 F
freezer applications.
b. Doors and Panels For the July 2014 ECS final rule, DOE
initialized its stock and shipments model for panels and doors based on the number of complete WICF units per unit of floor space area, per building of a given type and size having any WICF
unit. These data were derived from the Commercial Buildings Energy Consumption Survey CBECS 1999 43
and CBECS 2003.44 45
These data show that 70 percent of panel shipments are mediumtemperature, 23 percent are lowtemperature wall panels, and the remaining 7 percent are lowtemperature floor panels in terms of ft2
shipped. DOEs forecasted shipments for WICF panels in 2020 are shown in Table II.19 of this document. For the June 2014 ECS final rule, DOE did not include panels and non-display doors that were installed outdoors its analysis.

TABLE II.19ESTIMATED PANEL SHIPMENTS, 2020

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Million ft2
Shipments million ft2

Utility
Temperature
Wall Panels

Medium

41 www.regulations.gov/document?D=EERE-2015BT-STD-0016-0029, WICF Refrigeration Equipment Shipment Data10212015.
42 See Chapter 9 of the TSD for the July 2017 ECS
final rule. Docket EERE2015BTSTD00160099.

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43 U.S. Department of EnergyEnergy Information Administration. Commercial Buildings Energy Consumption Survey 1999. Washington, DC.

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44 U.S. Department of EnergyEnergy Information Administration. Commercial Buildings Energy Consumption Survey 2003. Washington, DC.
45 See Chapter 9 TSD for the June 2014 ECS final rule. Docket EERE2008BTSTD00150131.

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