Proposed standard RESNET/ICC 301-202x amends ANSI/RESNET/ICC 301-2022, to update the standard for the 2025 edition. The amendments in candidate standard RESNET/ICC 301-202x when incorporated with the amendments made by Standard 301-2022’s Addenda A, B, C, E and F will form the 2025 edition of Standard 301. A summary of the changes to Standard ANSI/RESNET/ICC 301-2022 open for comment in this draft include: Replace fan efficiency with specific fan power Incorporate interpretations of Standard 301-2022 on Hot Water Distribution Piping Insulation Requirements Hot Water Distribution Pipe Length Calculation Requirements Fixture Factor Determination Modify the definition of Bedroom to align Standard 301, Energy Rating with candidate Standard 850-202x, H20 Rating Energy rating software modeling consistency changes MINHERS Addendum 53f issues Air Source Heat Pump modeling clarification Natural ventilation clarification Eae removal Effective Duct R-values (and buried ducts) Index Adjustment Design issue fix Specify thermal properties of CMU walls. This is the first public review draft, PDS-01 of RESNET/ICC 301-202x. It is submitted for public review and comment for 45 days, beginning August 2nd, 2024, and ending September 16, 2024. Only the changes shown in draft PDS-01 with strike-through and underline and red print are open for comment. To review the draft click on Draft PDS-01, RESNET/ICC 301-202x Update To submit your comments, click on “SUBMIT COMMENTS HERE” below. Comments are posted in real time and you will be able to review comments by clicking on “VIEW COMMENTS HERE” below. Tips and Reminders for Submitting Public Comments Comments must pertain to the changes shown in the draft as either strike-through or underlined text in red print. Comments not on the changes under consideration will be rejected. Comments should include a specific proposed change to the text of the draft open for comment and an explanation sufficient for the review committees to understand the commenter’s concern or objection. Proposed added text must be underlined and text proposed to be removed must be shown using strike-through. If not submitted in this format, the public comment may be rejected. Do not submit comments on other chapters or on sections or proposed changes that are not identified as open for public comment by red print. Comments not on the proposal under consideration will be rejected. If you submit public comment representing the collective interests of a group of stakeholders, you are encouraged to submit ONE public comment and identify all stakeholders in that comment. While not required, this expedites the ability of the committees to respond to commenters in a timely manner. Public comments are reviewed by committees comprised of volunteer members, that are Raters, Providers, Software Developers and other industry and public interest stakeholders. They are not reviewed by RESNET Staff. Most amendments to RESNET standards are proposed by industry and public stakeholders not RESNET. To learn more about submitting proposed amendments visit this page: https://www.resnet.us/about/standards/submit-proposed-amendments/ SUBMIT COMMENTS HERE To submit a comment and view the draft Standard, please check back on August 2, 2024. VIEW COMMENTS HERE Entry Date: September 7, 2024 at 4:47 PMFull Name: Richard PorterAffiliation: CfiFOAM, Inc., the nation’s largest supplier of injection foam for CMU wallsAddress: 5909 Echo Drive Knoxville, Tennessee 37919Phone Number: 8655884465Email: richard@cfifoam.comPage Number: 82Section/Table/Figure Number: Table Building Element: Wall Assembly, Construction type, Determine and record the structural system of wallsComment Intent: ObjectionComment Type: TechnicalComment and Proposed Change: DownloadEntry Date: September 7, 2024 at 6:00 PMFull Name: Richard PorterAffiliation: CfiFOAM, Inc., the nation’s largest supplier of CMU foam insulationAddress: CfiFOAM, Inc. Knoxville, Tennessee 37919Phone Number: 8655884465Email: richard@cfifoam.comPage Number: 119-120Section/Table/Figure Number: Table C1. Material Thermal PropertiesComment Intent: ObjectionComment Type: TechnicalComment and Proposed Change: DownloadEntry Date: September 16, 2024 at 10:27 PMFull Name: Kevin CavanaughAffiliation: Cavanaugh & Associates (Lightweight Aggregate & Insulating Foams)Address: 9809 N Valley Hill Drive MEQUON, Wisconsin 53092Phone Number: 4145596434Email: kevin@cavanaughandassociates.comPage Number: Page 119Section/Table/Figure Number: Table C.1(2)Comment Intent: ObjectionComment Type: TechnicalComment and Proposed Change: Download Entry Date: August 5, 2024 at 10:57 AMFull Name: Philip FaireyAffiliation: FSEC Energy Research CenterAddress: 1679 Clearlake Road Cocoa, Florida 32922Phone Number: +13215376233Email: pfairey@fsec.ucf.eduPage Number: 75Section/Table/Figure Number: Table 7.1.2(1)Comment Intent: ObjectionComment Type: TechnicalComment:Table Note ‘a’ and Footnote 112 are basically incorrect as the data for CO2e emissions was not derived from these sources. This error was also corrected in MINHERS Standard Addendum 79f to point to the correct source for these CO2e data. There is also a rouge ‘2’ in the Fuel Oil #2 row under the SO column, which is also mislabeled. It should be SO2 so perhaps that is where the rouge ‘2’ came from. Proposed Change to Amendment:Provide the correct specifications for the table values in accordance with MINHERS Standard Addendum 79f. Entry Date: August 6, 2024 at 6:23 PMFull Name: Scott HorowitzAffiliation: National Renewable Energy LaboratoryAddress: 15013 Denver West Parkway Golden, Colorado 80401Phone Number: 3038832792Email: scottghorowitz@gmail.comPage Number: 41, 44-46Section/Table/Figure Number: Comment Intent: ObjectionComment Type: TechnicalComment:ANSI/RESNET/ICC 301-2019 Addendum A-2019 updated the calculations for clothes washer/dryers and dishwashers, but incorrectly did not update the cycles per year as determined by FSEC-PF-464-15 Estimating Daily Domestic Hot-Water Use in North American Homes. Furthermore, the FSEC publication includes separate equations for single-family and multifamily households for 1) clothes washers/dryers, 2) dishwashers, 3) fixtures, and 4) distribution waste that should be adopted by the ANSI 301 Standard now that the Standard governs how multifamily units are modeled. This will ensure more accurate water heating energy use is calculated for multifamily units. Proposed Change to Amendment:See the Tracked Changes in the attached document. I can also provide a spreadsheet that illustrates the differences if that is of interest. Entry Date: August 8, 2024 at 1:52 PMFull Name: Scott HorowitzAffiliation: National Renewable Energy LaboratoryAddress: 15013 Denver West Parkway Golden, Colorado 80401Phone Number: 3038832792Email: scott.horowitz@nrel.govPage Number: 56Section/Table/Figure Number: 4.4.3.1.6Comment Intent: ObjectionComment Type: TechnicalComment:In Section 4.4.3.2.7, heat pump sizing for the Rated Home was modified relative to 301-2022 to be “at least” the larger of the building heating and sensible cooling loads. Additional language was added for heating and cooling systems. Section 4.4.3.1.6 for the Reference Home should be similarly modified. Rationale: If the Reference Home is assigned a heat pump in a hot, dry climate like Phoenix, setting the nominal heat pump capacity equal to the sensible cooling capacity would result in insufficient cooling capacity during the hottest hours of the year, and thus unmet hours and lower cooling energy consumption. (Unlike for heating, there is no supplemental cooling backup system to ensure the setpoint is maintained.) Proposed Change to Amendment:4.4.3.1.6 Heat Pump equipment capacity shall be sized to at least equal the larger of the building heating and sensible cooling loads calculated in accordance with these procedures. Heating equipment shall be sized to at least meet the building heating load and cooling equipment shall be sized to at least meet the building sensible cooling load. Entry Date: August 26, 2024 at 5:00 PMFull Name: Sharla RieadAffiliation: EnergySmart InstituteAddress: 11601 Orchard Rd. Kansas City, Missouri 64134Phone Number: 816-678-8884Email: sharla@energysmartinstitute.comPage Number: 5Section/Table/Figure Number: Definition of a BedroomComment Intent: Not an ObjectionComment Type: EditorialComment:I was part of the committee that worked on the new definition of a bedroom. One important sentence was left off that states that the number of bedrooms cannot be less than one. Also, the reason this came up in the first place was due to conflicting information between the definition and the informative note. It was agreed that the informative note reference to a closet would be removed when the definition was updated. The informative note also looks like it has a leftover issue where the word “Bedroom” was split. The split should be removed to match the word in the definition and not cause further confusion. Proposed Change to Amendment:Add this additional sentence to the definition of a Bedroom, see attached for all changes. For all Dwelling or Sleeping Units, the number of Bedrooms shall not be less than one. Entry Date: August 26, 2024 at 5:10 PMFull Name: Sharla RieadAffiliation: EnergySmart InstituteAddress: 11601 Orchard Rd. Kansas City, Missouri 64134Phone Number: 816-678-8884Email: sharla@energysmartinstitute.comPage Number: 5Section/Table/Figure Number: Definition of a BedroomComment Intent: Not an ObjectionComment Type: GeneralComment:My previous comment adding the end sentence to the definition is incorrect. The part about the infomative note needing to have the closet removed is correct. Please keep the requested changes to the informative note but remove the request to add the final sentence to the definition. I remembered further discusssions that moved that from the definition to the calculation section and it is present in item 4.2.1.1. It does not belong as part of the definition. Proposed Change to Amendment:No change to the amendment, just a change to my previous comment.
