Surface-Four Findings Discussed at IGMA Meeting

“Use of Fourth-Surface Coatings in a Cold Climate,” presented by Tim Clancy and Lisa Green of Guardian Industries, was one of the main topics of discussion today at the 2013 Insulating Glass Manufacturers Alliance Annual Conference in New Orleans.

The presentation, which was based on a study Guardian conducted, noted that the main goal of the study was the investigation of “real-world implications of the National Fenestration Rating Council (NFRC) 500 condensation resistance (CR) number as it pertains to the use of fourth-surface low-E coatings in cold environments in conjunction with a low-E on the third surface of a dual-glazed insulating glass unit (IGU).”For the study, which took place between Fall 2011 and Fall 2012, six double-hung windows with vinyl frames were examined.The windows had a 16-mm gap with 90-percent argon, 10-percent air fill.

Additionally, interior temperature was maintained at 70 degrees Fahrenheit with three different relative humidity (RH) levels of 30 percent, 40 percent and 50 percent. Outdoor conditions included a 12.3-mile-per-hour wind, temperatures varying between 65 to -20 degrees Fahrenheit, held steady between 0 and -20 degrees Fahrenheit at night.

The presentation included videos of the condensation tests performed to show the differences in condensation between the traditional low-E window and the traditional low-E with surface 4 coating. Results of the 30-percent tests showed relative consistency in the levels of condensations, similar to the results seen for the 40-percent condensation tests. The 50-percent test showed that the fourth surface coated window had condensation which appeared much more quickly and grew at a faster rate than the lower humidity tests.

“The condensation front only differed for about a ½ inch to an inch with the addition of the surface four; when you get to higher humidity you see the fully condensed surface,” said Green. “The basis of this study was to determine if CR was a good method for determining condensation; we found it was a fairly good predictor.”

600450 Surface-Four Findings Discussed at IGMA Meeting glassonweb.com

See more news about:

Others also read

Guardian SunGuard® SuperNeutral™ (SN) 70/37 coated solar control glass was selected for its beautiful, neutral, transparent appearance with low reflection, consistent colour, high solar protection and high light transmission.
Guardian Glass will delight visitors to it stand at BAU 2019 with a demonstration of the endless possibilities of glass – for today tomorrow and beyond – to a world in which glass will play an even greater role in our lives.
Trivago is a popular tech start-up company that allows users to compare prices of hotels and booking sites and share their travel experiences.
The architect selected Guardian SunGuard® SuperNeutral® (SN) 70/37 on Guardian ExtraClear float glass for the glazed façade, windows and impressive-looking atrium.
Find the most suitable architectural glass in minutes with the new online Product Selector from Guardian Glass.
Guardian SunGuard® SuperNeutral™ (SN) 70/41 coated solar control glass was chosen for the curved, triple-glazed façade and top-floor office glazing.

Add new comment