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BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/BECU
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BUILDING ENERGY CODES UNIVERSITY
ANSI/ASHRAE/IES Standard 90.1-2010 Scope and Application
April 2011 – PNNL-SA-80144
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Section 1 - Purpose
To provide minimum requirements for the energy-efficient design of buildings except low-rise residential buildings
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Purpose (Section 1)
Scope (Section 2)
Definitions, Abbreviations & Acronyms (Section 3)
Administration & Enforcement (Section 4)
Scope & Application
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It replaces ANSI/ASHRAE/IESNA Standard 90.1-2007
It is the reference standard for the commercial chapter of the 2012 IECC
It is the professional “standard of care” set by ASHRAE consensus
Why is Standard 90.1-2010 Important?
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Section 2 - Scope
New buildings and their systems
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Section 2 - Scope (cont’d)
New portions of buildings and their systems (additions)
addition: an extension or increase in floor area
or height of a building outside of the existing
building envelope.
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Section 2 - Scope (cont’d)
New systems and equipment in existing buildings (alterations)
alteration: a replacement or addition to a building or its systems and equipment; routine maintenance, repair, and service or a change in the building’s use classification or category shall not constitute an alteration.
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Section 2 - Scope (cont’d)
New equipment or building systems part of industrial or manufacturing processes
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Envelope must comply if • heated by a heating system with an output capacity
≥ 3.4 Btu/h-ft2 or • cooled by a cooling system with a sensible output capacity ≥ 5 Btu/h-ft2
Virtually all mechanical, power, and lighting systems are covered
• Examples include– heating, ventilating and air conditioning– service water heating– electric power distribution – metering provisions
Section 2 - Scope (cont’d)
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What does not apply Too little heating or cooling Single-family, multifamily of three stories or less, manufactured or
modular homes Buildings that don’t use electricity or fossil fuel
Section 2 – Scope Exception
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Certain terms, abbreviations, and acronyms are defined in this section for the purposes of this standard15 pages of definitions1 page of abbreviations and acronyms
– Example:• COP: coefficient of performance
Defined terms are italicized in text of standard– Example:
• boiler: a self-contained low-pressure appliance for supplying steam or hot water.
Section 3 Definitions, Abbreviations, and Acronyms
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Overall statement of what must complyNew BuildingsAdditions to Existing BuildingsAlterations of Existing BuildingsReplacements of Portions of Existing BuildingsChanges in Space Conditioning
Administrative RequirementsPermitsEnforcementLocal
Section 4 Administration and Enforcement
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ComplianceNew buildingsAdditions to existing buildings
– Exceptions• Trade-offs will be allowed
Alterations to existing buildings– Exceptions
• Designated historically significant• Annual energy consumption
Section 4 Administration and Enforcement
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Buildings that are specifically designated as historic
by the adopting authority or on the National Register of Historic Places or eligible for listing by the U.S. Secretary of Interior
If the building’s annual energy consumption is the same as a building that meets the requirements of Sections 5-10
verified by a design professional using methods acceptable to the authority having jurisdiction
Section 4Exceptions for Alterations
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ComplianceReplacement of portions of existing buildingsChanges in space conditioning
Compliance DocumentationConstruction DetailsSupplemental InformationManualsLabeling of Materials and Equipment
–Fenestration, doors, insulation, mechanical equipment, and packaged terminal air conditioners
Section 4 Administration and Enforcement
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Inspection ItemsWall insulation after the insulation and vapor retarder are in place but before concealmentRoof/ceiling insulation after roof/insulation is in place but before concealmentSlab/foundation wall after slab/foundation insulation is in place but before concealmentFenestration after all glazing materials are in placeContinuous air barrier after installation but before concealmentMechanical systems and equipment and insulation after installation but before concealmentElectrical equipment and systems after installation but before concealment
Section 4 Administration and Enforcement - Inspections
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Section 1 - Purpose Section 2 - Scope Section 3 - Definitions, Abbreviations, and Acronyms Section 4 - Administration and Enforcement Section 5 - Building Envelope Section 6 - Heating, Ventilating, and Air Conditioning Section 7 - Service Water Heating Section 8 - Power Section 9 - Lighting Section 10 - Other Equipment Section 11 - Energy Cost Budget Method Section 12 - Normative References
Structure of 90.1-2010
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A. Rated R-Value of Insulation and Assembly U-Factor, C-Factor, and F-Factor Determinations
B. Building Envelope Climate CriteriaC. Methodology for Building Envelope Trade-Off Option
in Subsection 5.6D. Climatic DataE. Informative References F. Addenda Description Information (Informative)G. Performance Rating Method (Informative)
Standard 90.1-2010 Appendices and Addenda