January 26, 2015 - New York, NY – “Traditionally, windows have been the weakest energy efficiency link in the building envelope,” says Aurimas Sabulis, managing director of Intus Windows (http://intuswindows.com/), a worldwide leader in the manufacture of energy-efficient triple pane windows, “and early, single-pane openings were once the most egregious offenders.”
In fact, Sabulis says that old single-glazed windows with clear glass allow the highest transfer of energy (either heat loss or heat gain) while permitting the highest daylight transmission. That’s the reason, he says, these windows are practically extinct in residential construction.
“Today’s standard is the double-glazed low-E window with insulation between the panes,” says Sabulis. “Of course, this is a vast improvement over a single pane because insulated windows are better at preventing heat loss and heat gain, keeping the internal temperature of a house relatively stable. However, even the best double-pane window is inadequate compared to the exterior wall.”
In recent years, Sabulis says that the Intus breed ultra high-efficiency window products has become more popular. He says that Intus windows are typically twice as efficient as double-pane units and narrow the performance gap between the opening and the wall on which they’re installed.
“At Intus, we offer some of the most energy-efficient windows commercially available in the U.S.,” says Sabulis. “Designed for new construction, as well as replacement projects, our energy efficient window products are the best that money can buy.”
While many architects are calling for windows that perform no lower than R-5, Sabulis says that R-7 is quickly becoming the industry standard, which is why Intus is producing some of the highest-performing products on the market. In fact, Sabulis says that R-5 windows are the lowest-performing product that Intus offers.
“The problem with most window companies is that their products aren’t versatile enough to be effective throughout the United States,” he explains. “That’s why Intus specializes in high-performance windows that cater to any region of the country.”
“One solution does not fit all,” he continues, noting that the United States has seven different climate zones.
Intus offers all-wood and aluminum-clad wood windows with R-values up to about 10. The company also manufactures Passive House–certified products, which is why students from Parsons The New School for Design; the Milano School of International Affairs, Management and Urban Policy at The New School; and the Stevens Institute of Technology selected the windows for their Empowerhouse project, an entry in the 2011 Solar Decathlon.