ASHRAE-90.1-2022- - Page 347
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 require- ments for a standard and may contain material that has not been subject to public review or a consen- sus process. Unresolved objectors on informative material are not offered the right to appeal at ASHRAE or ANSI.)
INFORMATIVE APPENDIX H ADDITIONAL GUIDANCE FOR VERIFICATION, TESTING, AND COMMISSIONING
This appendix provides guidance on best practices for stand-alone functional performance testing ( FPT ) and commissioning processes (including FPT ) that relate to Sections 4.2.5, 5.9, 6.9, 7.9, 8.9, 9.9, 10.9, 12.2(e), and G1.2.1(e) of Standard 90.1. This appendix also contains information on the typical overall commission- ing process that goes beyond the requirements of Standard 90.1. It also addresses how to integrate suggested commissioning and testing activities that are specific to ANSI/ASHRAE/IES Standard 90.1 required controls, systems, and assemblies into the typical commissioning process. The requirements for verification, testing, and commissioning in Standard 90.1 focus specifically on direct support of Standard 90.1 requirements; however, there are additional items often included in a more comprehensive commissioning process that support Standard 90.1 requirements, with these examples:
a. Commissioning building envelope moisture integrity is not required by Standard 90.1; however, prevent ing moisture damage to the envelope assembly supports the goals of Standard 90.1. b. Commissioning HVAC controls to ensure comfort are not required by Standard 90.1; however, controls
that maintain comfort properly result in longer term operation of automatic energy efficiency control elements that support the goals of Standard 90.1. c. Commissioning daylight responsive controls beyond functional testing of stepped lighting reduction for
energy efficiency is not required by Standard 90.1; however, designing and commissioning a continuous dimming daylight system with nondistracting operation and proper illumination levels reduces occupant disruption or complaints and helps ensure the longevity of the savings provided by the Standard 90.1 daylight responsive control requirements.
The information in this appendix provides suggested activities that will improve the likelihood that the energy performance defined by Standard 90.1 is achieved. Commissioning for full performance of the sys- tems installed for energy efficiency avoids a significant investment being lost due to occupants disabling energy efficiency components due to disruption or not meeting non- energy criteria. The actual energy effi- ciency of a building, designed to meet or exceed the requirements of Standard 90.1, is dependent on its operational performance. Many provisions in Standard 90.1 rely on proper execution and verification in design, construction, and operation for their energy savings to occur, especially the proper operation of control sys- tems . Commissioning can have a positive impact on building performance and compliance with Standard 90.1 by providing additional oversight and guidance to the design and construction team.
H1. BENEFITS OF AND RESOURCES FOR BUILDING COMMISSIONING
Common problems in buildings include incorrect installation of building insulation, discontinuity of air and thermal barriers, and nonfunctioning or poorly functioning lighting, HVAC, and other control systems that either are not properly configured or perform outside of intended parameters. These problems adversely affect building energy efficiency and increase building operating expenses. Achieving the intent of Standard 90.1 requires the building ’s design, construction, and operation be in accordance with the standard and includes design and construction performance verification. Using the commissioning process, as defined in ASHRAE Standard 202 and Guideline 0, to verify that a new or renovated building performs in accordance with Standard 90.1 will improve the expected operational performance of the building . See Informative Appendix E for the following references to commissioning standards and guidelines:
a. ANSI/ASHRAE/IES Standard 202, Commissioning Process for Buildings and Systems, provides a stan dard overall approach for the commissioning process. b. ASHRAE Guideline 0, The Commissioning Process, provides more detailed guidelines for steps in the
commissioning process. c. ASHRAE Guideline 1.1, HVAC&R Technical Requirements for the Commissioning Process, provides
more detailed guidelines on the commissioning technical process and functional testing of HVAC systems . d. IES DG 29, The Commissioning Process Applied to Lighting and Control Systems, provides more
detailed guidelines on the commissioning technical process and functional testing of lighting systems . e. ASTM Standard E2947, Standard Guide for Building Enclosure Commissioning, provides an overall
guide for the process of testing of building enclosures.
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