ASHRAE-90.1-2022- - Page 395
Extracted Content
(This appendix is not part of this standard. It is merely informative and does not contain requirements necessary for conformance to the standard. It has not been processed according to the ANSI requirements for a standard and may contain material that has not been sub- ject to public review or a consensus process. Unresolved objectors on informative material are not offered the right to appeal at ASHRAE or ANSI.)
INFORMATIVE APPENDIX M ADDENDA DESCRIPTION
ANSI/ASHRAE/IES Standard 90.1-2022 incorporates all addenda to ANSI/ASHRAE/IES Standard 90.1-2019. Table M-1 lists each addendum and describes the way in which the standard is affected by the change. It also lists the ASHRAE, IES, and ANSI approval dates for each addendum.
Table M-1 Addenda to ANSI/ASHRAE/IES Standard 90.1-2019
| Addendum | Sections | Description of Changesa | ASHRAE Standard Committee Approval | Cosponsor Approval (IES) | ASHRAE BOD/Tech Council Approval | ANSI Approval |
|---|---|---|---|---|---|---|
| af | G3.1, G3.6 | Modifies lighting modeling requirements in Appendix G with more specific guidance on determining lighting power in the baseline vs. proposed building. | 6/30/2020 | 5/29/2020 | N/A | 6/30/2020 |
| bc | 6.5.4.8 | Requires condensing boilers for new construction to achieve condensing-level efficiency (i.e., 90%Et) for large boiler systems (i.e., between 1 and 10 million Btuh) and, to ensure condensing occurs, requires boiler entering water to be in the prescribed limits for temperature or flow rate. | 6/30/2020 | 5/29/2020 | N/A | 6/30/2020 |
| cd | 6.5.6.1.2 | Establishes a minimum enthalpy recovery ratio for energy recovery systems and specifies how bypass or control of the energy recovery system must operate to ensure proper economizer performance. | 6/30/2020 | 5/29/2020 | N/A | 6/30/2020 |
| db | G3.1, G3.4-9 | Clarifies how to establish the Normative Appendix G baseline space conditioning categories that must be used in conjunction with Tables G3.4-1 through G3.4-8 so that the baseline envelope will remain consistent should Section 3 undergo changes. | 6/30/2020 | 5/29/2020 | N/A | 6/30/2020 |
| by | 3.2, 10.2.1, 10.5.1 | Adds a minimum prescriptive requirement for on-site renewable energy. | 6/26/2020 | 5/19/2020 | 7/1/2020 | 7/31/2020 |
| ck | 12.4.1, 12.4.3, Table 12.5.1 | Explains Section 12 modeling requirements for proposed designs that utilize a trade-off for the renewable energy requirements in Section 10.5.1. | 6/26/2020 | 5/19/2020 | 7/1/2020 | 7/31/2020 |
| cp | 4.2.1.1, G2.2, Table G3.1 | Explains Appendix G modeling requirements for proposed designs that utilize a trade-off for the renewable energy requirements in Section 10.5.1. | 6/26/2020 | 5/19/2020 | 7/1/2020 | 7/31/2020 |
| a | 6.5.3.7, 6.5.3.8, 13 | Establishes minimum fan efficacy requirements for low-power ventilation fans and references Standard 62.2 for determining the minimum ventilation rates for nontransient dwelling units. | 10/30/2020 | 10/7/2020 | N/A | 10/30/2020 |
| b | 6.4.3.8 | Revises demand control ventilation parameters to be based on climate zone and Standard 62.1 airflow requirements. | 10/30/2020 | 10/7/2020 | N/A | 10/30/2020 |
| c | 6.3.2, 6.4.3.3 | Requires residential HVAC systems greater than 2.1 kW to be equipped with start/stop and setback controls. | 10/30/2020 | 10/6/2020 | N/A | 10/30/2020 |
| d | 3.2, 6.4.3.4.5 | Adds new term to define parking garage section so that fan requirements can be refined for different configurations. Requires fans with the ability to modulate airflow and power as specified. | 12/30/2020 | 12/16/2020 | N/A | 12/30/2020 |
| f | Table 6.5.1-2 | Clarifies the efficiency improvement required in order to eliminate an economizer. | 2/26/2021 | 2/18/2021 | N/A | 2/26/2021 |
| g | 6.5.1.1.5 | Adds more specific language about relieving excess outdoor air during air economizer operation through the use of fans or dampers. | 12/30/2020 | 12/16/2020 | N/A | 12/30/2020 |
| a. These descriptions may not be complete and are provided for information only. | a. These descriptions may not be complete and are provided for information only. | a. These descriptions may not be complete and are provided for information only. | a. These descriptions may not be complete and are provided for information only. | a. These descriptions may not be complete and are provided for information only. | a. These descriptions may not be complete and are provided for information only. | a. These descriptions may not be complete and are provided for information only. |