ASHRAE 90.1 USERS MANUAL
STANDARD 90.1 USER’S MANUAL Based on ANSI/ASHRAE/IES Standard 90.1-2019, Energy Standard for Buildings Except Low-Rise Residential Buildings
| Organization: | ASHRAE |
| Publication Date: | 1 January 2020 |
| Status: | active |
| Page Count: | 462 |
scope:
Scope of the Standard
The standard provides minimum energy-efficiency requirements for the design and construction of new buildings and new construction in existing buildings. In particular, it applies to new buildings and their systems, building additions and their systems, and new systems and equipment in existing buildings. The standard has been expanded to include new equipment or building systems specifically identified in the standard that are part of commercial, industrial, and manufacturing processes. This empowers the Standard 90.1 committee to address specific commercial, manufacturing, and industrial processes. Requirements have been added to address commercial coolers and freezers, escalators, moving walkways, and elevator cab lighting. Future addenda will likely address other manufacturing and/or industrial processes.
The scope of the requirements covers the design of the building envelope, lighting systems, HVAC&R systems, and other energy-using equipment.
The standard applies to the building envelope when it encloses heated and/or cooled space where the heating system has an output capacity greater than or equal to 3.4 Btu/h∙ft² (10 W/m²) of floor area or where the cooling system has a sensible output capacity greater than or equal to 5 Btu/h∙ft² (15 W/m²) of floor area. The standard also applies to systems and equipment used in conjunction with buildings, including systems for heating, ventilating and air conditioning, service water heating, electric power distribution, electric motors and lighting.
The standard does not apply to
a. single-family houses,
b. multifamily structures of three stories or fewer above grade,
c. manufactured houses (modular or mobile homes) or
d. buildings that do not use either electricity or fossil fuel.
Certain other buildings or building components may be exempt by specific notations in the technical sections of the standard.
The standard shall not be used to circumvent any safety, health, or environmental requirements. If there is a conflict between the requirements of this standard and safety, health, or environmental codes, interpretation should be requested from the local AHJ.
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