Energy Efficient Window Manufacturer Offers Advice on Choosing the Right Window

Intus Windows, a leading manufacturer of passive house compliant windows, stresses the importance of carefully choosing windows.

Online PR News – 31-August-2015 – New York, NY – “Windows provide our homes, schools and interior spaces with light, warmth, and ventilation,” says Rolandas Talalas, Principal/Managing Director of Intus Windows (,orldwide leader in the manufacture of energy-efficient window products. “However, if you choose the wrong windows, you can negatively impact a building’s energy efficiency, which is why it is important to use high-performance energy efficient windows.”

Talalas says that most people don’t realize that they can reduce energy costs by installing energy-efficient windows.

“If you are on a tight budget,” he says, “energy efficiency improvements to existing windows can also help, but the best way to achieve maximum energy efficiency is to buy the best energy efficient window products that you can afford.”

In most cases, Talalas says that it is more cost-effective to replace existing windows, than to try to improve their energy efficiency. New, energy-efficient windows eventually pay for themselves through lower heating and cooling costs, he explains, and sometimes even lighting costs. However, he says that improving window performance in your home involves design, selection, and installation.

“Before selecting new windows for your home, determine what types of windows will work best and where to improve your home’s energy efficiency,” Talalas explains. “It’s a good idea to understand the energy performance ratings of windows. This will allow you to know what energy performance ratings you need for your windows based on your climate and the home’s design.”

According to Talalas, ENERGY STAR® has established minimum energy performance rating criteria by climate. However, he says that these criteria don’t account for a home’s design, such as window orientation.

“Windows are an important element in passive solar home design, which uses solar energy at the site to provide heating, cooling, and lighting for a house,” he says. “Passive solar design strategies vary by building location and regional climate, but the basic window guidelines remain the same. The idea is to maximize solar heat gain in winter and minimize it in summer.”

He explains that in heating-dominated climates, glazing areas should face south to collect solar heat during the winter. In the summer, when the sun is high overhead, overhangs or other shading devices can help prevent excessive heat gain.

To be effective, Talalas says that south-facing windows should have a solar heat gain coefficient (SHGC) of greater than 0.6 to maximize solar heat gain during the winter, a U-factor of 0.35 or less to reduce conductive heat transfer, and a high visible transmittance (VT) for good visible light transfer.

“Windows on east, west, and north-facing walls should be minimized while still allowing for adequate daylight,” he says. “In cooler climates, effective strategies include preferential use of north-facing windows and generously shaded south-facing windows. Windows with low SHGCs are more effective at reducing cooling loads.”

When constructing a new home, building, or simply doing some major remodeling, Talalas says that builders, designers and property owners should also take advantage of the opportunity to incorporate their window design and selection as an integral part of your whole-house design.

Intus Windows ( a pioneer in manufacturing and distributing super energy-efficient windows and doors in the United States. Driven by technology, innovation, and continuous progress Intus Windows energy-efficient windows, doors, and curtain walls lines will fit any commercial, residential or industrial application, and they are Passive House Certified and suitable. For the past 21 years the company has manufactured and installed more than 800,000 windows and doors all over the world, with main export markets in Scandinavia, Central and Eastern Europe. Today, with a manufacturing facility in Lithuania, Intus has entered into the super energy-efficient window market here in the United States. For more information, call 1-888-380-9940.

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