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1/2/2019 Attachments Energy Rating Council 1
Third Party Certification for Window Attachments
December 10, 2018
Agenda
• Background on AERC• AERC Certification• Material Testing• Full Product Certification• Engage• Questions
Attachments Energy Rating Council 27/16/2018
Background
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What is the AERC?
AERC is an independent, public interest organization whose
mission is to provide consumers with credible, relevant, and
comparable information about window attachments and their
performance.• AERC members include
• Public Interest Groups• National Labs• Commercial Labs• Product Manufacturers• Fabric Manufacturers• Utilities
Window Attachments
Images courtesy of Somfy, Lutron, and Mechoshade.
Why is AERC Necessary?
• Window attachments can save energy• However, many consumers are unaware of their
energy‐saving capability
• Consumers have no way to compare the energy performance of attachments
• Utility program managers also benefit from standardized rating system and energy performance information
1/2/2019 Attachments Energy Rating Council 6
Why Do Manufacturers Participate?
• Third‐party certification validates claims• AERC label differentiates window attachments• Generates standardized product performance ratings– Enables direct product comparisons
• Access to utility pilots and incentives
AERC Certification
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Phased Ratings Development
Residential Phase 1: Open for certification• Blinds• Cellular Shades• Roller Shades• Storm Windows• Solar Screens• Pleated Shades
Residential Phase 2: Starting in 2019• Awnings• Rolling Shutters
Commercial: Development in 2019
AERC Technical Ratings
• U‐Factor
• Solar Heat Gain Coefficient
• Visual Transmittance
• Air Leakage (as applicable)
• Annual Energy Performance – Comparative metric
• Cold climate• Warm climate
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The AERC Certification Process
• AERC’s approach to rating and certification:
Pre‐certification: Materials/Glazing
• Physical testing
Certification: Product • Simulation
Post‐certification: Product
Verification
• Material physical testing
Relevant Technical Standards
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Certification Standards to Reference
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AERC 301: Independent Inspection Agency
Guidelines
AERC 302:ACE and Simulator Guidelines
AERC 400: Policies and Procedures
AERC 300: Manufacturer Guidelines
AERC 100:National Standard for Rating the Performance of Fenestration Attachments
Ratings and Certification Development Process
LBNL develop technical modeling in WINDOW and THERM
Technical Committee reviews analysis and software updates
Technical Committee develops rating standards
Certification Committee develops Certification standards
Reviewed and approved by AERC members and Board
Certification begins
‐ Consensus based approach to standards development‐ Rely on industry and national lab technical knowledge
‐ AERC is public interest organization so standards must reflect that
Material Testing
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Role of Materials
• Window attachments can only be simulated, rated, and submitted for AERC certification if their materials are:– Tested by an approved test lab in accordance with AERC program requirements; and
– Listed in one of the following:• Complex Glazing Database (CGDB)
– With AERC “@” mark of approval
• International Glazing Database (IGDB)
AERC 1.1 Standard
• Defines technical procedures to determine the optical and thermal properties of materials used in window attachments:– Optical openness factor (OF)– Visible transmittance (Tvis)– Solar transmittance (Tsol)– Visible reflectance (Rvis)– Solar reflectance (Rsol)– Bi‐directional scattering distribution function (BSDF)– Emissivity (Ɛ)– Infrared transmittance (Tir)– Permeability factor (PF)– Thermal conductivity (k)
Full Product Certification
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Relevant Technical Standards
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Product Simulation
• Simulator uses product information to develop models using WINDOW and THERM and produce Energy Performance ratings through AERCalc– Involves specifying product geometry based on literature or drawings supplied to the Simulator
• Grouping products reduces simulation time and cost
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Manufacturer Review
• Simulator provides manufacturer with results of simulations – U‐factor, SHGC, VT, EPH, EPC
• Manufacturer reviews, confirms results, and instructs simulator to submit products for listing in the AERC CPD–Work with simulator to provide any additional information (e.g. marketing description)
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AERC Commercial Program
• Goal: basic program in place by end of 2019• Initial stages of development
– Fabrics and material properties already established– Identifying window attachment energy‐related information needs in the commercial space
• Building relationships with and gaining input from commercial stakeholders:
Architects Interior designers
Building owners
Building managers
Specifiers Contractors Commercial attachment
manufacturers
Fabric manufacturers
Engage
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Recommendations
1. Join AERC2. Review Standards3. Plan Software and Standard Updates4. Develop Standards5. Engage with AERC in pilots
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AERC Standards
• Technical– AERC 1, 1.2 and 2
• Certification– AERC 300 Manufacturer Participant Guidelines– AERC 400 Policies and Procedures
• Members can view in Members Only section of website https://aercnet.org/members‐only/
• Non‐Members can purchase online https://aercnet.org/technical‐certification‐documents/
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Back‐up Slides
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Material properties tested in accordance with AERC technical documents
Window attachment product modeled using material properties and product geometry as inputs
Performance properties and EP ratings generated through performance simulations
Submitted for listing in the AERC Certified Products Database
Certified products undergo verification testing
The AERC Certification Process
Energy Performance
EP value Signifies: The window attachment installed over baseline window
<0 Use more energy on an annual basis than if it had no attachment at all
0 No net impact on the energy performance of the home on an annual basis
>0 and 100 Improves the net annual energy performance of the home
100 Performance is equivalent to a net zero energy window
>100 Net annual energy producer compared to a net zero energy window
1/2/2019 Attachments Energy Rating Council 29
Climate Assumptions
• Energy performance varies based on climate– Single rating inadequate
Cool climate = Minneapolis, MN
Warm climate = Houston, TX
8/23/2018 Attachments Energy Rating Council 31
Label Design
Features:‐EP in both Cool and Warm Climate‐Product Category maximum‐Unique AERC Product ID
Attachments Energy Rating Council 328/23/2018
Attachment Product Certification Process
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Manufacturer applies to become an AERC Program Participant
Manufacturer reaches out to Accepted
Simulator and agrees on services
Simulator simulates product performance
based on manufacturer‐provided
information
Manufacturer reviews simulation results
Accepted Calculation Entity submits Certified Product Listing Report and documentation
Independent Validation of simulations
AERC Administrator invoices manufacturer for listing fees and
independent validation
Manufacturer pays invoice and Administrator
completes final review of listings
Administrator issues Acceptance Agreement
(AA) to sign
Once fees paid and AA signed, product(s) listed
in the CPD and manufacturer begins labeling products
If necessary, simulator submits to CGDB
Shading Layer Library
Inspection and verification testing of listed products to ensure compliance
Questions?
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