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IGMA’s Visual Quality group decides on single document

Post Time:Nov 12,2013Classify:Industry NewsView:36

The Visual Quality Working Group decided one document would be sufficient as Guidelines for the Identification of Visual Obstructions in the Air Space of Insulating Glass Units on the second day of the Insulating Glass Manufacturers Alliance 8th Annual Conference in Sanibel, Fla., Jan. 28-Feb. 1. Chairman Tracy Rogers, technical director, Edgetech, I.G., Cambridge, Ohio, began by presenting three options: a document that would cover both the commercial and residential markets; another document that would point out differences between the two markets; or two documents specific to each market. The changes agreed upon at the meeting will be made to the draft document, which will be reviewed again by the working group. The Thermal Stress Working Group reported it had received no response to an IGMA Thermal Stress Field Service Inspection Record Form. The group discussed the possibility that companies did not want to report failures. Chris Barry, director of technical services, building products, Pilkington North America in Toledo, Ohio, suggested asking for positive reports showing instances in which thermal stress did not occur under severe conditions. The group members agreed to submit to IGMA Executive Director Margaret Webb up to three forms each that would document either failures or positive results. Members said they would fill out forms themselves or directly contact others they know in the industry. The Gas Permeability Working Group finalized Phase 1 of a research project: an executive summary report on the Evaluation of the Permeability of Sheet Materials. The group then reviewed two bids for Phase 2: Evaluation of the Gas Permeability of Edge Seal Assemblies. The cost for such testing could reach about $70,000, according to group chairman Bruce Virnelson, technology manager, commercial products, PRC DeSoto International, Glendale, Calif. “We have to go outside organization to get funding,” Virnelson said. Phase 1 cost about $35,000 and was supported by funds from IGMA members and other associations, Virnelson said. Webb will contact those supporters as well as other companies and organizations that could benefit from such research, he said. A discussion about the correct verbiage for the SIGMA Guidelines for Use of Capillary/Breather Tubes took up the majority of the Glazing Guidelines Working Group. The Sealed Insulating Glass Manufacturers' Association is in Chicago. Members of IGMA and the Glass Association of North America, Topeka, Kan., will form a group to develop standard guidelines for the use of capillary tubes. Webb and GANA Technical Director Greg Carney agreed to meet to begin the process. LOW-E FOR RESIDENTIAL GLAZING Using the right low-emissivity coating in a specific climate can save hundreds of dollars in energy costs each year, according to a comparison test of residential annual energy consumption. Chris Barry, director of technical services, building products, Pilkington North America in Toledo, Ohio, presented the findings of the experiment Jan. 31 during the Insulated Glass Manufacturers Alliance 8th Annual Conference in Sanibel Island, Fla. The test, which cost $300,000, measured the selection of optimum low-E type for residential glazing in heat dominated climates. Identical side-by-side houses were set up adjacent to each other in Ottawa with the simulated occupancy of two adults and two children for a month in January 2006 and again in July 2006. Each family member was represented by a 60-watt bulb that turned on and off during specific times of day. For example, four bulbs came on around the breakfast table in the morning. The dishwasher ran daily, the washer and dryer turned on each week, lights and televisions went on and off, even the toaster popped in the kitchen of the controlled environment.One house was fitted with windows with a high solar heat gain coefficient pyrolytic low-E coating, the other had a low SHGC sputtered low-E. The high SHGC windows performed better in colder temperatures while the low SHGC windows did well in the hot month. Barry displayed a chart that predicted annual savings at different cities across North America and Canada. The estimated savings in Halifax, Nova Scotia, with a high SHGC window was $150. The chart showed the low SHGC product could save more than $150 annually in Florida and about $140 in Texas. It’s up to the consumer to make sure the window with the correct coating is installed, Barry said. “Looking at the glass won’t tell you [the coating],” Barry said. “Have you got it? You paid for it. Is it there? Is it on the surface you want?” Share this article:

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