ASHRAE-90.1-2022- - Page 396
Extracted Content
Table M-1 Addenda to ANSI/ASHRAE/IES Standard 90.1-2019 (Continued)
| Addendum | Sections | Description of Changesa | ASHRAE Standard Committee Approval | Cosponsor Approval (IES) | ASHRAE BOD/Tech Council Approval | ANSI Approval |
|---|---|---|---|---|---|---|
| h | 4.2.1.1 | Clarifies that the gross floor area should be used when calculating the area-weighted building performance factor (BPF.) | 10/30/2020 | 10/6/2020 | N/A | 10/30/2020 |
| i | G3.1.2.10 | Reinstates exception to Appendix G exhaust air energy recovery requirements for laboratory HVAC systems. | 10/30/2020 | 10/6/2020 | N/A | 10/30/2020 |
| k | 12.5.2 | Adjusts Section 12 budget building fan requirements to avoid creating a fan power credit for energy recovery. | 10/30/2020 | 10/6/2020 | N/A | 10/30/2020 |
| l | G3.1 | Revises Appendix G language describing how to calculate and assign vertical fenestration in the baseline design. | 10/30/2020 | 10/6/2020 | N/A | 10/30/2020 |
| m | 6.4.3.4.1 | Clarifies requirements for motorized dampers on vents for elevator shafts and stairwells; adds exception to allow nonmotorized dampers in mild climates and low-rise buildings. | 10/30/2020 | 10/6/2020 | N/A | 10/30/2020 |
| n | 6.5.2.6 | Adds an exception to Section 6.5.2.6 allowing units to heat the ventilation airstream above 60°Fif exclusively using series energy recovery. | 10/30/2020 | 10/6/2020 | N/A | 10/30/2020 |
| o | 9.4.1.1 | Reduces the minimum connected load that triggers daylighting responsive control requirements for sidelighting and toplighting. | 7/30/2021 | 6/9/2021 | N/A | 7/30/2021 |
| p | 9.1.2, 9.1.4 | Modifies portions of Section 9 pertaining to alterations to ensure that such projects meet all applicable lighting requirements. | 2/26/2021 | 2/18/2021 | N/A | 2/26/2021 |
| q | Table G3.7 | Corrects Table G3.7 to maintain equivalent space type requirements per the established 2004 baseline. | 2/26/2021 | 2/18/2021 | N/A | 2/26/2021 |
| r | 6.4.3.3.3 | Clarifies that residential spaces are not required to have optimal start controls. | 2/26/2021 | 2/18/2021 | N/A | 2/26/2021 |
| s | 3.2, 5.5.3.1.1, 5.5.3.2, 5.5.4.5, Table 12.5.1, C3.6, Table G3.1 | Replaces the term_solar reflectance index (SRI)_ with_solar reflectance_ (for walls only) and establishes a minimum solar reflectance requirement for east-, south-, and west-oriented walls in Climate Zone 0. | 2/26/2021 | 2/18/2021 | N/A | 2/26/2021 |
| t | 3.2, 4.2.5, 5.1.3, 5.4.3, 5.7.2, 5.7.3.1, 5.8, 5.9.1.2, 6.4.4.2.1, 6.4.5, 6.5.1, Table 12.5.1 (5), 12.5.3, 13, C1.5, C3.5.5.3, C3.6, C3.1.1.4, Table G3.1 (5), Table H-3 | Adds requirement to perform whole-building air leakage testing and measurement on buildings less than 25,000 ft2, specifies performance requirements for compliance, references the applicable ASTM standard, and modifies relevant Section 3 terminology. | 6/25/2022 | 6/17/2022 | 6/29/2022 | 7/29/2022 |
| u | 12.5.2 | Specifies the use of air economizers for budget building systems and clarifies method for determining prescriptive HVAC requirements based on the budget system type and capacity. | 7/30/2021 | 6/9/2021 | N/A | 7/30/2021 |
| v | 12.7.2, G1.3.2 | Clarifies the documentation that must be submitted to the rating authority or jurisdiction by projects following Section 12 and Appendix G, including simulation files upon request. | 7/30/2021 | 6/9/2021 | N/A | 7/30/2021 |
| w | G3.1.3.7 | Indicates that chillers (type and number) shall be modeled in the baseline building design based on the total peak coincident cooling load of the baseline HVAC system using chilled water. | 2/26/2021 | 2/18/2021 | N/A | 2/26/2021 |
| x | 6.4.1.2, Table 6.8.1-3 | Updates the cooling efficiency adjustment for centrifugal chillers and the requirements for chillers utilizing freeze- protection. Replaces “fluid” and “water” with “liquid” throughout. | 12/9/2021 | 12/8/2021 | N/A | 12/9/2021 |
| y | Table 6.8.1-16 | Modifies the minimum efficiency requirements for air-source heat pumps, updates the related AHRI rating standards, introduces a new metric (COPHR) for units that perform heat recovery during chiller operation. | 12/9/2021 | 12/8/2021 | N/A | 12/9/2021 |
| 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. |