Monday, July 19, 2010
Air Leakage Subcommittee
The Air Leakage Subcommittee reported that it has nothing active for the moment.
U-factor Subcommittee Considers Three Ballots
NFRC 100 Garage Door Ballot. This ballot is intended to delete language addressing specimen panel number and height requirements in Section 5.5.1 A. In many cases, manufacturers seeking U-factor ratings in accordance with NFRC 100 are not tooled to produce 21”height sections for some door models and also may not use a four-panel configuration. Therefore, the standard should only require that the specimen fill a 7’ by 7’ opening.
After some discussion considering the specifics of the wording, a motion from Mike Thoman to move the language as balloted forward for approval passed unanimously.
NFRC 100 Sash Kit Ballot. This ballot is intended to revise the language regarding sash kits of any operator type. The intent of Option two of Section 5.1.2 in NFRC 100 is to allow the manufacturer of a sash kit of any operator type to use their existing whole product line rating if the sash in the kit and the product line are identical in material and design. Therefore, this ballot is presented to clarify this intent in NFRC 100.
One negative that arose was that the ballot contains certification language that does not belong in the technical document. Mike Thoman said a task group will be formed to revise the language and present a revised document at a later date. All associated negatives will be shared with task group.
NFRC 100 Table 4-3 Wall and Sloped Glazing Ballot. The intent of this ballot is to revise Table 4-3 of NFRC 100 for Curtain Wall, Window Wall, and Sloped Glazing. Table 4-3 is being balloted to remove the product type “glazed wall” because the term is not used consistently with the rating applied to curtain walls and window walls.
A motion to move the language forward as balloted was approved with no negatives or comments.
Solar Heat Gain Subcommittee
The Solar Heat Gain Subcommittee discussed three ballots.
NFRC 100 Garage (Vehicular Access) Doors. This ballot is intended to delete language addressing specimen panel number and height requirements in Section 5.5.1 A.
One negative asked to consider adding the following language to the section: “In accordance with U-factor validation testing to NFRC 100 for simulated garage door products, sectional garage doors shall have the SHGC determined based on a specimen filling 2.13 (7’) wide by 2.13 (7’) tall opening (the aperture is smaller than the test specimen). Panel sizes and construction shall be in accordance with manufacturers normal specifications for a door of these dimensions.”
A motion to move the NFRC 200 garage door ballot forward to the Technical Committee for approval and implementation upon publication passed.
NFRC 200 Section 4.5.G Laminates. This ballot is intended to clarify language in NFRC 200-2010, Section 4.5, as it relates to laminated glazing in the matrix of center-of-glazing SHGC/VT options.
One negative focused on the verbiage, “ratings for products with obscured, frit, or wired glass and/or stained glass shall be deemed to be equivalent to the ratings for the clear glass” and whether it should be deleted in its entirety since Window 6 can model these variations to provide more accurate VT ratings. Following some discussion, the crux of the issue here focused on whether the word “frit” should be removed.
The negative was ultimately withdrawn, and a motion to move the 200 Section 4.5.G to the Technical Committee and to be implemented upon publication passed 15 – 9.
The final ballot in this block involved a revised draft of NFRC 201, which adds the capability to measure the SHGC of Tubular Daylighting Devices (TDD) in solar calorimeters.
Previously, the NFRC Technical Interpretation Number, TI-2003-22, has been used to specivy how to measure the SHGC of TDDs using NFRC 201. After refinement by the TDD SHGC Testing Group, the intent of the previous NFRC Technical Interpretation has been incorporated into the document and into a new Annex G. Only the sections of 201that were revised are included.
One of the negatives presented was that the incident light needs to be more accurately assessed to avoid significantly overstating the resulting SHGC. A motion to find this negative persuasive and substantive and return it to Task Group passed.
Technical Committee Resumes Tomorrow
The Technical Committee Block will resume at 11:00 a.m. (EDT) tomorrow, Tuesday, July 20, 2010 and run until 2:00 p.m. The Software, Condensation Resistance, Annual Energy Performance, Attachment, and CMA Subcommittees are scheduled to meet.
After Committee Chair Werner Lichtenberger, of Truseal Technologies, opened the meeting, Bipin Shah, of WinBuild, Inc., presented three motions on behalf of the Research Subcommittee.
The committee passed motions to extend the deadlines for the Windows6/THERM6 research project and the complex visible transmittance (VT) research project to the Fall 2010 Membership Meeting, and approved the new scope for the NFRC Ventilation Rating Task Group.
The committee then heard reports from Sneh Kumar, of Traco, on the activities of the Optical Properties Subcommittee, and Charlie Curcjia, of CARLI, Inc., on the Thermophysical Properties Subcommittee meeting from earlier in the day.
The committee concluded its business with the day’s first unanimous vote – to dissolve the NFRC 600 Glossary Task Group.
Ray McGowan, NFRC senior program manager, reported on thermophysical property submissions. He noted that 14 new materials have been submitted since the NFRC Spring Membership Meeting. The updated NFRC 101 is expected to be released next week.
McGowan continued the meeting by providing an update on the Thermophysical Properties Interlaboratory Comparison (ILC). This is the first ILC for thermophysical properties that NFRC has ever conducted.
The testing, involving combinations of composite board, is complete, and the preliminary results are quite good, McGowan reported. The full report will be available at the NFRC Fall 2010 Membership Meeting.
In other subcommittee news, NFRC 101/103 has been disbanded. Also, Curcija reported that the subcommittee had been directed to develop an electronic version of NFRC 101 Appendix A and to provide that as a THERM library file. (The subcommittee will be proceeding with a similar version for NFRC 101 Appendix B as well). The subcommittee then formed a task group to review Appendix A and Appendix B, and it is seeking a volunteer to chair this new task group.
The subcommittee heard reports from a number of its task groups, including Optical Property Priorities and Daylighting Rating. Mike Rubin, of LBNL, presented the “Top Ten Optical Subcommittee Priorities” list, which ranged from research and standards for diffuse glazing and shading materials to completing the “100 Shade” project. He then provided a status update on international standards.
Mudit Saxena, of Heschong Mahone Group, and Roger LeBrun, of VELUX-America, Inc., who co-chair the Daylighting Rating Task Group, reported on recent activities. Mudit noted that the task group has held five virtual meetings since the NFRC Spring 2010 Membership Meeting in New Orleans. The task group decided upon definitions for two phases of daylighting potential ratings:
- Phase 1: To create a rating system for daylighting potential utilizing the existing NFRC Visible Transmittance (VT) rating combined with known, bright day incident illuminance values
- Phase 2: To create a rating system to allow designers to utilize a standardized measurement of the appropriate illumination characteristics of fenestration products considering directions effects for incident and emitted illumination, illumination quality, illumination quantity, illumination distribution and other complex variables as needed
The subcommittee concluded its meeting by passing a motion to form an optical properties interlaboratories comparison (ILC) task group. Rubin will chair the ILC 2009 Task Group.
DOE Funding for Research
NFRC staff member, Ray McGowan, was the first to speak, providing a report on research project funding status. McGowan informed listeners that approximately $772, 970 in funding from the U.S. Department of Energy (DOE) is available to fund research projects through 2014.
Window 6/Therm 6 Validation Research
Willie duPont of Sunergy Consulting offered an update on Window 6/Therm 6 validation research, stating that simulations involving various tests models are still underway. duPont also said that once the results are compared and evaluated, the project will culminate with a peer reviewed paper.
While this project had been intended to conclude in the summer of 2010, NFRC Chair, Joe Hayden, made a motion that the deadline be expanded to NFRC’s fall 2010 meeting in November, and the motion passed.
TDD U-factor Research
Dave DeBlock of ODL reported that there is just one remaining issue and said research will be completed in the fall with no further need for extensions.
Condensation Resistance Procedure for CMA
Charlie Curcija of Carli, Inc. said that three issues in this area have been resolved by Lawrence Berkeley National Labs (LBNL). A fourth issue, which emerged this past weekend, will be resolved later this week. Curcija added that the project will still meet its deadline, which is NFRC’s fall meeting. Bipin Shah of WinBuild, Inc. recommended that the Project Monitoring Committee meet often enough to ensure meeting the deadline.
Complex VT Rating Research
Ross McCluney and Willie duPont are expecting a report from LBNL, which will be assessed, clearing the way for a final vote at NFRC’s fall meeting. This project was performed to evaluate two different approaches using a range a products and not to develop a new procedure. A motion to extend the vote on this project until the fall passed.
Gas Permeability Research
Werner Lichtenberger said there is a meeting this week on Thursday, and there will be a report issued to NFRC. No other news.
Steve Strawn spoke about the need for some revisions to revise the scope of this project, and a motion specified three revisions:
1. Standardizing the method for calculating fenestration net clear ventilation area dimensions.
2. Standardizing the effect of screen mesh for two or three representative screen cloth categories
3. Developing recommendations for a rating system for NFRC certification purposes based on current standardized sizes.
The motion passed 27 – 2
In closing the meeting, the Research Subcommittee brought forth one ballot, which dealt with fenestration illumination research. This research is just an idea for the moment, but it could turn into a full-fledged project.
Ross McCluney summarized the scope of this project by stating that nearly every architectural daylighting design project in the U.S. involves buildings with some kind of shading device on them. Shades are used widely for privacy and glare control in both residential and nonresidential spaces. McCluney added that skylights come in many varieties and cannot currently be rated for visible transmittance (VT) by the NFRC.
A motion asking that the task group charged with preparing this proposal include details on cost sharing passed 30 – 3.
- Green Building Focus Conference & Expo, Aug. 25-26, in
America, Sept. 14-17, in Las Vegas
- Greenbuild 2010, Nov. 16-19, in
And, don’t miss the (in-person) NFRC Fall 2010 Membership Meeting in
More than 100 people have registered for the online meeting. “It’s terrific not seeing you this summer,” joked Hayden.
Hayden then pointed out one of the main benefits of these types of meetings. “The potential to save costs is tremendous,” he said.
NFRC committees and subcommittees are conducting their normal activities during the virtual meeting, but task groups are not meeting. Comments on 11 ballots – the Research & Technology Committee has one, the Ratings Committee two, and the Technical Committee eight – will be reviewed and discussed.
The meeting is being hosted virtually through the Web software tool GoToWebinar® by Citrix. All callers will be muted during the meeting. Attendees who want to speak will virtually “raise their hands” to enter a queue. They may speak after the committee or subcommittee chairperson recognizes them.
Hayden asked participants to exercise patience with this first-of-a-kind effort for NFRC.
Just like an in-person meeting, members will be voting on NFRC business. Stay tuned to NFRC News Now for updates throughout the meeting.
NFRC's Virtual Committee Week Meeting will begin at 11:00 a.m. today. Be sure to check back throughout the day for updates on the proceedings.
Are you ready to venture into Cyberspace? NFRC's Meetings Manager, Cheryl Gendron, is.
Send us your photos.