nfrc webinar/membership meeting · nfrc webinar/membership meeting . march 25, 2014 . l. earning....
TRANSCRIPT
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NFRC WINDOW
ENERGY RATINGS AND BUILDING ENERGY CODES
NFRC Webinar/Membership Meeting
March 25, 2014
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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.
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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
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FOR AIA CREDIT
• Email [email protected] your name and AIA number
• I will record/report to AIA
• 1.5 CEUs
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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 7
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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
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NFRC 100/200 =
Sticker on each window!
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COMMERCIAL ONLY-NOT RESIDENTIAL
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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
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IECC Definition
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LABELED = CERTIFIED
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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
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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
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NFRC in IECC
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IECC CLIMATE ZONES
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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
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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://reca-
codes.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
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Begins January 1, 2015 Until December 31, 2014
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
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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 33
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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
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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
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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
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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
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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
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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
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Defaults May Be Assigned
• Code official may simply assign defaults
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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
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NOT ACCEPTABLE
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• 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
About NFRC
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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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• 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!
NFRC Rating Determination
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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
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CAD drawing file, section view, curtain wall
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THERM simulation file, profile view, curtain wall
THERM assigns properties
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U-factor (thermal transmission)
NFRC 100
VT (Visible Transmittance)
NFRC 200
SHGC (Solar Heat Gain) NFRC 200
NFRC Rating Documents and Indices
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Air Leakage (Air infiltration, no
exfiltration)
NFRC 400
CR (Condensation Resistance)
NFRC 500
NFRC Rating Documents and Indices
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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 U-factor – +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
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U-FACTOR TESTING
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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
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Commercial Fenestration Energy Simulation Program
Component Modeling Approach (‘CMA’) Program
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Glazing infill / Center of Glazing assembly
Frame system / Frame assembly
Spacer system / spacer assembly
PRODUCT CONFIGURATION
Overall product rating calculation
Glazing component Spacer component Frame component
CMAST Concept
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CMAST U-factor, SHGC Calculation Screen Shot
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NFRC CMA Label Certificate (page 2):
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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!
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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 – Audited during inspections – Confirm construction documents match what is on
Label Certificate 74
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Compliance Program
NFRC can fine for mislabelling – $5000 per incident – Follow up with audit if necessary – Revocation possible if egregious
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New: ComCheck Prompts for NFRC Rating
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Please contact NFRC with any questions NFRC Webpage: www.nfrc.org Ray McGowan
– Sr. Program Manager – [email protected] – 240-821-9510