Voglio sapere a riguardo di…

15808

Federal Register / Vol. 86, No. 56 / Thursday, March 25, 2021 / Proposed Rules
Sacramento Metropolitan AQMD Rule 414,8 San Joaquin Valley Air Pollution Control District APCD Rule 4308,9
Santa Barbara County APCD Rule 360,10 South Coast AQMD Rule 1146.2,11 and Ventura County AQMD
Rule 7411.1.12
Issue 14: DOE seeks input on whether there are additional jurisdictions requiring ultra-low-NOX gas-fired hot water and steam boilers.
In the January 2016 final rule, to determine the venting installation costs for consumer boilers, DOE considered vent categories as defined in the National Fuel Gas Code.13 81 FR 2320, 23592361 Jan. 15, 2016. In its analysis, DOE determined that all natural draft boilers and a fraction of mechanical draft boilers would be vented as a Category I appliance negative pressure vent system with high temperature flue gases. DOE
determined that the remaining fraction of mechanical draft boilers would be vented as a Category III appliance positive pressure vent system with high temperature flue gases. DOE
determined that very few noncondensing models would be installed as a Category II appliance negative pressure vent system with low temperature flue gases or a Category IV
Nitrogen Oxides Emissions from Natural Gas-Fired Boilers and Water Heaters Available at: https
ww3.arb.ca.gov/drdb/ba/curhtml/r9-6.pdf Last accessed October 30, 2019.
8 Sacramento Metropolitan Air Quality Management District, Rule 414: Water Heaters, Boilers and Process Heaters Rated Less Than 1,000,000 BTU PER HOUR Adopted 080196
Amended 032510 Available at: http
www.airquality.org/ProgramCoordination/
Documents/rule414.pdf Last accessed October 30, 2019.
9 San Joaquin Valley Air Pollution Control District, Rule 4308: Boilers, Steam Generators, and Process Heaters0.075 MMBtu/hr to less than 2.0
MMBtu/hr Adopted October 20, 2005, amended December 17, 2009, Amended November 14, 2013
Available at: https www.valleyair.org/rules/
currntrules/03-4308_CleanRule.pdf Last accessed October 30, 2019.
10 Santa Barbara County Air Pollution Control District, Rule 360: Boilers, Steam Generators, and Process Heaters 0.0752 MMBtu/hr Adopted 10/
17/2002, revised 3/15/2018 Available at: https
www.ourair.org/wp-content/uploads/rule360.pdf Last accessed October 30, 2019.
11 South Coast Air Quality Management District, Rule 1146.2: Emissions of Oxides of Nitrogen from Large Water Heaters and Small Boilers and Process Heaters Adopted January 9, 1998, amended January 7, 2005, amended May 5, 2006, amended December 7, 2018 Available at: http www.aqmd.gov/docs/
default-source/rule-book/reg-xi/rule-11462.pdf?sfvrsn=17 Last accessed October 30, 2019.
12 Ventura County Air Quality Management District, Rule 7411.1: Large Water Heaters and Small Boilers Adopted 9/14/99, revised 9/11/12
Available at: http vcapcd.org/Rulebook/Reg4/
RULE%2074.11.1.pdf Last accessed October 30, 2019.
13 Available at: https catalog.nfpa.org/NFPA54ANSI-Z2231-National-Fuel-Gas-Code-P1184.aspx Last accessed March 5, 2021.

VerDate Sep<11>2014

17:19 Mar 24, 2021

Jkt 253001

appliance positive pressure vent system with low flue gases temperatures.
However, DOE determined that all condensing installations would be vented as a Category IV appliance. For non-condensing boilers, DOE accounted for both commonly-vented consumer boilers together with a water heater and isolated consumer boilers separately vented. For replacements, DOE added any costs associated with updating or repairing existing flue venting including vent resizing, chimney relining, and updating of flue vent connectors. DOE also accounted for additional labor costs associated with larger boilers, replacing a larger drain pan, and potential space-constraint issues when the original boiler location is too small to accommodate the replacement boiler. For efficiency levels that include electronic ignition, power vent, or condensing design, DOE added the cost of installing an electrical outlet, a new venting system, any additional cost for condensate disposal, any additional costs for secondary and primary piping, and cost of a Y-strainer, if required for a fraction of installations.
In the January 2016 final rule, DOE
also included installation adders for new construction, as well as for new owner installations for hot water gasfired boilers. 81 FR 2320, 2361 Jan. 15, 2016. For non-condensing boilers, the only adder would be a new metal flue vent including a fraction with stainless steel venting and condensate withdrawal for a fraction of category III
models. For condensing gas boilers, the additional costs for new construction installations related to potential amended standards would include a new flue vent, combustion air venting for direct vent installations and accounting for a commonly-vented water heater, and condensate withdrawal.
Issue 15: DOE seeks input on issues and costs associated with venting of flue gases of boilers, in particular regarding retrofit issues related to installing a new vent system for higher-efficiency consumer boilers, disconnecting the existing consumer boiler from a noncondensing common venting system, and upgrading existing non-condensing venting chimney relining or vent resizing. DOE also seeks input on how often and in what applications direct venting or sealed combustion are used or required.
Issue 16: DOE seeks input on issues and costs associated with condensate disposal for higher-efficiency consumer boilers, specifically how often and in what applications a condensate filter or a condensate pump is installed.

PO 00000

Frm 00009

Fmt 4702

Sfmt 4702

Issue 17: DOE seeks input on issues and costs associated with installing consumer boilers in multi-family buildings.
DOE measures LCC and PBP impacts of potential standard levels relative to a no-new-standards case that reflects the likely market in the absence of amended standards. Similar to the 2016 final rule, DOE plans to develop market-share efficiency data i.e., the distribution of product shipments by efficiency for the product classes DOE is considering, for the year in which compliance with any potential amended standards would be required. For the 2016 final rule, DOE
developed market shares of different consumer boiler energy efficiency levels in the no-new-standards case, using historical shipments data provided by stakeholders, data from the AirConditioning, Heating and Refrigeration Institute AHRI contractor survey, and ENERGY STAR unit shipment data for residential boilers.14 81 FR 2320, 2364
2366 Jan. 15, 2016. If DOE determines that a rulemaking is necessary, DOE
intends to use the most recent data available from these sources, together with any more current data that may be provided by stakeholders. Also similar to the January 2016 final rule, because these data may not cover all of the energy efficiency levels under consideration, DOE intends to use most the recent data on the number of water heater models at different energy efficiency levels, as reported in DOEs compliance certification database,15 the AHRI directory of certified product performance,16 the California Energy Commission appliance efficiency database,17 and the ENERGY STAR
certified boiler directory.18
Issue 18: DOE requests shipments data for consumer boilers, broken down by product class, that show current 14 ENERGY STAR, Unit Shipments data Available at: http www.energystar.gov/
index.cfm?c=partners.unit_shipment_data Last accessed October 30, 2019.
15 U.S. Department of Energy, Compliance Certification Database Available at: https
www.regulations.doe.gov/certification-data/
q=Product_Group_s%3A Last accessed October 30, 2019.
16 Air-Conditioning Heating and Refrigeration Institute, Directory of Certified Product Performance for Residential Boilers Available at:
https www.ahridirectory.org/
NewSearch?programId=25&searchTypeId=3 Last accessed October 30, 2019.
17 California Energy Commission CEC, Appliance Efficiency Database. Available at:
https cacertappliances.energy.ca.gov/Pages/
ApplianceSearch.aspx Last accessed October 30, 2019.
18 ENERGY STAR, ENERGY STAR Certified Boilers Directory Available at: https
www.energystar.gov/productfinder/product/
certified-boilers/results Last accessed October 30, 2019.

E:FRFM25MRP1.SGM

25MRP1