31 Addenda Open for Public Review for Standard 90.1
From eSociety, February 2019
The following addenda from ANSI/ASHRAE/IES Standard 90.1-2016, Energy Standard for Buildings Except Low-Rise Residential Buildings, are open for public review.
The following is under a 30-day public review from Feb. 1 to March 3:
1st Public Review of BSR/ASHRAE/IES Addendum bx
Appendix A contains F-factors for heated slabs, but does not include combinations of perimeter insulation that has a different R-Value than the under-slab insulation. This addenda adds heated slab F-factors for multiple combinations of under-slab and perimeter insulation. These values were derived from a regression of the current heated slab F-factors for fully insulated, uninsulated, and 12” vertical perimeter insulation taken from Table A6.3.1 Assembly F-Factors for Slab-on-Grade Floors.
The following are under a 30-day public review from Feb. 8 to March 10:
This addendum incorporates public review comments into this informative commissioning appendix in reference to the first public review draft.
The proposed addendum clarifies how baseline must be established when Appendix G does not explicitly prescribe the baseline parameters but allows it to be different from the proposed design.
This ISC represents resolution of comments from the 1st and 2nd public reviews. Values in this ISC reflect updates to the lighting model. If addendum bb is adopted, it represents an average 11% reduction in lighting power allowance when comparing 2016 to the as proposed 2019 space-by-space LPD values. This 11% reduction is NOT weighted by floor area type.
This is a second public review draft. Comments from the first public review have been incorporated into these changes. The requirement for a minimum 40 degree delta T between the leaving and entering boiler water has been removed. Boilers less than 300,000 Btu/h are no longer included in the proposal.
This proposal considers a minimum prescriptive requirement for onsite renewable energy. The renewable energy resources are defined within the proposal; however, the specific resource to be used is left up to the designer or building owner. The listed capacity requirement, as well as the scalar evaluation, is based on photovoltaic generation as that is the most ubiquitous and cost effective renewable energy resource and equipment/system currently available across the industry.
This addendum clarifies and aligns the requirements of Appendix C with more informative outputs, clarifies the schedule of shades, updates energy costs, and references updated minimum efficiency requirements in Section 6.
This proposed addendum adds U-factors to Table A3.2.3 for use of continuous insulation on metal building walls with double layer cavity insulation. The calculations follow the same basis of calculation used in other parts of the table based on calculation procedures in A9.4.6.
The calculation procedures in A9.4.6 are developed from and are specifically for assemblies with a 60-inch purlin and girt spacing. This proposal clarifies the limitations of the calculation procedures in A9.4.6.
This addendum provides energy saving potential by removing one of three criteria for fan motor selections, it addresses concerns of prior interpretations, it increases the design options for load-matching variable-speed fan applications, it accommodates new motor and drive technologies, and it simplifies the motor selection criteria for fans.
This proposed addendum adds vacuum insulating glazing to the list of options for reach-in doors in walk-in coolers and freezers.
This addendum addresses two areas of uncertainty in the definitions of daylighted zones:
1) What areas should be considered daylighted around the perimeter of building atria
2) At what size does an exterior building overhang render the side-lighted area non-effective for displacing electric lighting.
This addendum updates the Building Performance Factors (BPFs) that are used for compliance with Appendix G. The BPFs represent the savings of any version of Standard 90.1 compared to Standard 90.1-2004 (the Progress Indicator). The BPFs in the previous addendum impacting BPFs (Addendum bt) were estimated based on the savings of Standard 90.1-2016 with a further reduction of 3%. The current proposal includes the savings of Standard 90.1-2016 including addenda through December 31, 2018 with a further reduction of 3%.
This proposed addendum makes the following changes to the lighting provisions of the Energy Cost Budget Method:
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Specifies that there is no trade off credit for plug-in lighting in multifamily occupancies and other space types where lighting design relies on plug-in fixtures not shown on drawings
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Establishes the baseline lighting power density (LPD) for dwelling units based on the design that meets high efficacy lamp requirements of Section 9.4.4. The LPD matches the permanently installed lighting LPD from the analysis used to set Building Performance Factors in Appendix G.
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Clarifies modeling methodology to capture lighting control savings, and aligns it with the relevant rules of Appendix G.
This proposal adds language for Section 11 to address the new proposed renewable energy requirements in addendum BY. The proposed approach allows a proposed design that does not include renewable energy required by Section 10.5.1 a method of trade off against other prescriptive requirements in the Standard.
This addendum updates Exceptions to 6.5.2.1 regarding DDC Controls.
The following is under a 45-day public review from Feb. 1 to March 18:
1st Public Review of BSR/ASHRAE/IES Addendum bw
This addendum revises LPD values for the building area method. The building area method is an alternate method in addition to the space-by-space method. It does not save energy because the energy savings have already been accounted for in the space-by-space method. This addendum does not have cost implications because costs of updating lighting power density allowances were addressed in Addendum BB.
The following are under a 45-day public review from Feb. 8 to March 25:
This is a second public review ISC to make changes to the proposed table as a result of the first public review comments. The following is a summary of the ISC changes:
1. Change the name for heat reclaim to heat recovery
2. Editorial corrections.
The following are the changes as a result of the ISC:
1. Clarify the US and outside US application
2. Some of the comments noted that AHRI 210/240-2023 is not currently published, but AHRI is very close to completing the update to reflect the DOE 10 CFR 430 Appendix M1 test procedure for SEER2 and HSPF and expects to have it completed in February 2019 likely before this ISC is released for comment.
This is document is an ISC to the first public review and only the changes of the ISC are available for comment. The changes made by the ISC are:
1. The language used to clarify requirements for applications in the U.S. and outside the U.S. will be updated to use the same standard language for all addendum impacted by this requirement
2. To support the change to SEER2 and HSPF2 we need to have a new reference for the procedures for these metrics.
DOE and the industry developed the 10 CFR 430 Appendix M1 but it does not include everything needed to rate a product and support certification. So AHRI is in the process of updating AHRI 210/240 and will release AHRI 210/240-2023 This document is nearly completed and targeted to be approved in February 2019, so we have included the reference to AHRI 210/240-2023 effective 1/1/2023.
This ISC to addendum bn makes corrections and changes to tables 6.8.1-4 and Table F-1.
This addendum incorporates changes to table 6.8.1-5 based on the first public review draft comments.
This addendum modifies table 6.8.1-6 and Table F5 based on the first public review draft comments.
This addendum makes changes to table 7.8 based on comments from the first public review draft.
The purpose of this addendum is to allow designers the option to use ASHRAE Standard 90.4 requirements instead of ASHRAE 90.1 requirements in computer rooms that have an IT equipment load larger than 10 kW. A computer room that has such a load is the same as the defined term “data center” in 90.4.
This addenda is intended to be primarily a clarification of the original intention for bypass and control to permit economizer operation.
The building area method is an alternate method to the space-by-space method. Energy savings are related to the addendum bb (space-by-space method). This addendum does not have cost implications because costs of updating lighting power density allowances were addressed in Addendum bb. The values in this addendum supersede Addendum bw.
During the period between the approval by the 90.1 Committee and publication of Addendum bw, addendum bb (Table 9.6.1, space-by-space method) values were revised. As mentioned earlier, the values from addendum bb (Table 9.6.1, space-by-space) flow into Table 9.5.1, building area method. At the end of this addendum (below the line) is a comparison of Addendum bw and this addendum.
This addendum makes changes throughout Section 11 to better align with Appendix G providing greater consistency between the two sections.
This proposed addendum cleans up outdated language regarding walk-in cooler and walk-in freezer requirements, and make the requirements consistent with current federal regulations that either already came into effect June 5, 2017 or will come into effect July 10, 2020.
SSPC 90.1 periodically reviews the normative references for applicability to this standard. Some new references have been added and many references have new effective dates. References not shown is this addendum are unchanged, and remain as currently listed in the standard or as modified in other addenda.
This proposal adds language for Appendix G to address the new proposed renewable energy requirements in addendum BY. The proposed approach allows a proposed design that does not include renewable energy required by Section 10.5.1 a method of trade off against other prescriptive requirements in the Standard.
Constructive comments are invited for the following public review drafts, which can be accessed on ASHRAE’s website.
All activity for reviewing and commenting on public review drafts can be accomplished completely online. To obtain a paper copy of any Public Review Draft contact:
ASHRAE, Inc.
Attn: Standards Public Review
1791 Tullie Circle NE
Atlanta, GA 30329-2305
or email standards.section@ashrae.org.
Paper copies are available for $35/copy if 100 pages or fewer and $45 if more than 100 pages.