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NFRC WINDOW
ENERGY RATINGS
AND BUILDING
ENERGY CODES
NFRC Webinar/Membership
Meeting
March 25, 2014
LEARNING OBJECTIVES
1.
Understand the 2012 IECC and ASHRAE 90.1-2010 fenestration
energy requirements for commercial construction.
2.
Understand the role of NFRC related to providing high-performance
fenestration for energy-efficient commercial construction.
3.
Understand the NFRC 100 and NFRC 200 documents, the NFRC
commercial fenestration certification program (CMA), and how CMA
enables energy codes compliance.
4.
Understand how the NFRC Component Modeling Approach (CMA)
Program and associated software (CMAST) are used as design and
compliance tools for developing valid specifications for fenestration
energy-related performance requirements.
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AIA CES INFORMATION
“The National Fenestration Rating Council” is a Registered
Provider with The American Institute of Architects Continuing
Education Systems. Credit earned on completion of this
program will be reported to CES Records for AIA members.
Certificates of Completion for non-AIA members are available on
request.
This program is registered with the AIA/CES for continuing
professional education. As such, it does not include content that
may be deemed or construed to be an approval or endorsement
by the AIA of any material of construction or any method or
manner of handling, using, distributing, or dealing in any material
or product. Questions related to specific materials, methods,
and services will be addressed at the conclusion of this
presentation.
Copyright Materials
This presentation is protected by US and International
Copyright laws. Reproduction, distribution, display and use of
the presentation without written permission of the speaker is
prohibited.
© National Fenestration Rating Council 2012
FOR AIA CREDIT
• Email rmcgowan@nfrc.org your name and
AIA number
• I will record/report to AIA
• 1.5 CEUs
5
BUILDING ENERGY CODES
• Incredibly complex codes
• Numerous building components to verify
• Sometimes hard to identify requirement
and component value
– No time to look for either!
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Building Energy Codes
• Ensures building performance
• Codes are laws enacted by state legislatures
or local jurisdictions
• IECC and ASHRAE most common
• Most states will soon move to IECC
2012/ASHRAE 90.1-2010
• Require window rating and labeling
– Prescriptive or performance
• New or renovation
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NFRC 100 (U-factor) and NFRC
200 (SHGC) are required in:
•
International Energy Conservation Code (IECC)
•
Also state developed codes (CA, WA, FL, etc.)
•
ASHRAE 90.1
•
ENERGY STAR©
•
USGBC-LEED
–
requires ASHRAE 90.1-2010
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Residential or Small Commercial
NFRC 100/200 =
Sticker on each window!
9
COMMERCIAL ONLY-NOT RESIDENTIAL
NFRC 100/200 =
One Label Certificate
For each project
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BUILDING ENERGY CODE
• NFRC 100 and NFRC 200 are instructions
on how to determine whole window energy
performance
– Center of glass is not acceptable
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LABELED = CERTIFIED
IECC Definition
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LABELED = CERTIFIED
ASHRAE 90.1 Definition
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USE OCEAN WEB SITE TO DETERMINE
CODE IN US
http://energycodesocean.org/code-status
Click on state to learn energy code specifics
14
Residential Code Compliance
• IECC 09 is residential energy code for most
states
• IECC 2012 will be adopted by most states in
the future
• IECC allows two window rating methods
– Default (punitive)
– NFRC 100 and 200 ratings
• IECC includes commercial code also
15
NFRC in IECC
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IECC CLIMATE ZONES
17
IECC 09 RESIDENTIAL
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IECC 2012-RESIDENTIAL
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IECC Window Defaults
• 2012 IECC
window
• Defaults
• Punitive!
• Project not
likely complaint
New: VT defaults
20
IECC 06 FOR TN (FROM RECA SITE)
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NFRC PARTICIPATES WITH:
• Building Code Appliance Project (BCAP)
– http://bcap-energy.org/
• Responsible Energy Codes Alliance (RECA)
– http://reca-codes.org/
– Obtain IECC compliance guides: http://recacodes.org/iecc-compliance-guides.php
• BCAP and RECA advocate for better energy codes
nationally
• ASHRAE 90.1 organization member, full committee
and envelope subcommittee
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WINDOW ENERGY INFORMATION
• Efficient Window Collaborative (EWC)
– www.efficienctwindows.org
– Use window selection tool to compare annual energy cost
of one window to another
• Windows for High-Performance Commercial Buildings
– http://www.commercialwindows.org
• Window Coverings and Attachments
– http://www.efficientwindowcoverings.org/
– Info on shades, blinds, awnings
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ENERGY STAR-residential only
Until December 31, 2014
Begins January 1, 2015
Northern criteria 1/1/16
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Commercial Code Compliance
• IECC allows ASHRAE 90.1 as alternate
• ASHRAE 90.1-07 is most common building
energy code
• Ways to satisfy building energy codes
– Default (punitive)
– NFRC 100 and 200 based ratings
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ASHRAE 90.1 NFRC
Statements
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NFRC IN ASHRAE 90.1
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Energy Code Requirements for
ASHRAE 90.1-07
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IECC AND ASHRAE 90.1
• IECC allows ASHRAE 90.1 as alternate
• Confirm with local code official what is
being enforced.
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IECC 09, Commercial
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IECC 2012-COMMERCIAL
Note: frame material dependency removed
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No NFRC ratings, use
defaults:
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Window Energy Rating
Confirmation
• NFRC offers a simple verification methods
• Residential
– Online database
– Look up CPD number
• Commercial
– Online database
– Look up project label certificate
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NFRC Makes Code
Enforcement Easy
• Developed easily verifiable ratings
• Residential
– Online database with 9.5 million rated products
• Commercial
– Online database enabling project specific label
certificates to be downloaded at no charge
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NFRC RESIDENTIAL RATING
CONFIRMATION
www.nfrc.org
Select “verify ratings”
Enter CPD #
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Commercial Compliance
• Ask Manufacturer/Builder for NFRC Label
Certificate
– Found on NFRC web site (www.nfrc.org )
– Electronic (PDF)
– No cost to download/access/view
• Caution
– NFRC offers bid report
– Preliminary document, accept during plan review
– Insist on label certificate at occupancy
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Check NFRC Label Certificate
for Compliance
37
Confirm U, SHGC on Label
Certificate
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Where do I get the label
certificates?
• NFRC posts all label certificates online as
energy codes require
• Easy to use
• No cost
• Downloadable adobe documents
• [live demo on web]
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Verify Commercial Window
Ratings
• Go here: www.nfrc.org
• Click on commercial link:
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NFRC HAS NEW, DEDICATED
COMMERCIAL CODE WEB SITE
http://www.nfrc.org/Commercial/Code-officials/
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Enter Search Criteria
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Click on Label Certificate Link
for Project
43
Review U-factor and SHGC
Values or Download Label
Certificate
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Compare to NFRC Label
Certificate
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What if no certificate is
available?
• Codes require default values be assigned
• You may direct manufacturers to use NFRC
ratings
– Put manufacturers in contact with NFRC
46
If no label certificate…
• Manufacturers may offer test reports per
NFRC 100/200
– Difficult to confirm
– May not be current
– NFRC does not recommend this method
47
Defaults May Be Assigned
• Code official may simply assign defaults
48
Unacceptable Window Energy
Performance documents
• U-factors and SHGC on drawings
• Marketing literature
• Center of glass values
• Documents from previous jobs
• Code officials determine what is acceptable
per the energy code!
• Architects can specify NFRC ratings to
ensure code compliance
49
NOT ACCEPTABLE
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About NFRC
• Formed by industry in 1989
• To provide standardized fenestration energy performance
ratings
• Educational non-profit public/private organization, not a trade
association, 501 C3
• 16on staff in five states, HQ near Washington DC
• 750participants (manufacturers labeling product)
• 260 members (vote at meetings, develop standards)
• Members may be:
• Fenestration and related building industry
• State energy offices
• Design professionals
• Utilities, consumer organizations
• Anyone with a fenestration interest
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Windows Matter!
Fenestration consumes 32% of that primary energy :
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NFRC PROVIDES REQUIRED RATINGS
• For Building Energy Codes
• For Manufacturers to compete fairly
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NFRC Rating Determination
•
Computer simulation is the basis of all ratings
•
Simulation performed at standardized sizes &
environmental conditions
•
Simulation generates a whole-product rating
•
Simulated U-factors validated by physical testing
–
•
4000 tests/year
Always whole product rating!
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ENERGY SIMULATION SOFTWARE
• Residential
– WINDOW 6.3 and THERM 6.3
– Written by University of CA-Lawrence Berkeley
National Labs
• Commercial
–
–
–
–
Component Modeling Approach Software Tool
Written by NFRC
WINDOW is embedded
THERM files are imported
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THERM Profiles use CAD
drawings
CAD drawing file, section view, curtain wall
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THERM assigns properties
THERM simulation file, profile view, curtain
wall
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NFRC Rating Documents and Indices
U-factor (thermal
transmission)
VT (Visible
Transmittance)
NFRC 100
NFRC 200
SHGC (Solar Heat Gain)
NFRC 200
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NFRC Rating Documents and Indices
Air Leakage (Air
infiltration, no
exfiltration)
NFRC 400
59
CR (Condensation
Resistance)
NFRC 500
SIMULATION AND TESTING
• All products are simulated
– Simulated values appear on labels
• One product/product line tested every 4
years
– About 4,000 tests each year
• Simulated U-factor compared to tested Ufactor
– +10% variance allowed
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RESIDENTIAL RATING PROCESS
• Product Certification Program
– Governs rating and labeling
• Laboratory Accreditation Program
– Governs test and simulation labs
• Certification Accreditation Program
– Governs Inspection Agencies
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RESIDENTIAL PROGRAM
• 12 test labs
– US, Canada, South Africa
• 20 simulation labs
– US, Canada, Philippines
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NFRC RESIDENTIAL PROGRAM
• 750 participants
– 95% of residential market
– Windows, doors, skylights, tubular daylighting
devices, some blinds/frits
– 9,000 product lines
– 9 million product options
– Only about 1% actual produced
• Must have NFRC ratings for energy codes
and ENERGY STAR
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Residential Quality Control
Compliance Assurance and
Penalties for non-compliance
U-FACTOR TESTING
Commercial Fenestration Energy
Rating Program
 NFRC has only allowable energy rating software
 May use residential method to rate for small
commercial
 Component Modelling Approach Software Tool
(CMAST)
– LBNL’s WINDOW program embedded
– LBNL’s THERM program provided spacer and frame
component modules for upload
66
Commercial Fenestration Energy
Simulation Program
Component Modeling Approach (‘CMA’) Program
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CMAST Concept
Glazing component
Frame component
Spacer component
Glazing infill / Center
of Glazing assembly
Frame system /
Frame assembly
Spacer system / spacer
assembly
PRODUCT CONFIGURATION
Overall product rating
calculation
68
CMAST U-factor, SHGC Calculation
Screen Shot
69
NFRC CMA
Label
Certificate
(page 2):
70
Commercial Participants
 31 Frame Manufacturers
– 6000 components
 5 Spacer Manufacturers
– 200 spacer components
 45 Glazing participants
– 2700 glass component
– NFRC accepted in LBNL IGDB
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Commercial Ratings
 313 Label Certificates
 6000 unique product ratings
 Need more!
72
NFRC Accredited Labs
 20 simulation labs, 4 in Canada
– Perform component simulations
 9 Accredited Calculation Entities (ACES), 1 in
Canada
– Issue LCs
 11 Testing labs, 1 in Canada
– Test whole product
– Validate U-factor for components
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Commercial Fenestration Quality
Control
 ACE’s audited every two years by staff
– Includes frame, spacer manufacturers
– Participate in interlaboratory study
 Test, simulation labs
– Audited every two years
– Participate in interlaboratory studies each year
 Label Certificates
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– Audited during inspections
– Confirm construction documents match what is on
Label Certificate
Compliance Program
 NFRC can fine for mislabelling
– $5000 per incident
– Follow up with audit if necessary
– Revocation possible if egregious
75
New: ComCheck Prompts for NFRC
Rating
76
Please contact NFRC with any
questions
 NFRC Webpage:
www.nfrc.org
 Ray McGowan
– Sr. Program Manager
– rmcgowan@nfrc.org
– 240-821-9510
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