Replacement Windows
Evolutionary Thermal Efficiency
Revolutionary Efficiency, Performance and Protection.
How you live is more than how you look. It’s how you perform. How you act and feel, under every condition life can throw your way. We can say this with certainty, because we’ve been around long enough to experience (and help guide) the evolution of window thermal eciency. And, we’ve taken part in revolutionary ideas in performance and protection along the way. Today, when it comes to thermal eciency, no other vinyl window manufacturer can match CertainTeed’s commitment to producing the highest quality, most thermally ecient windows and doors on the market.


Argon gas
Thermaflect Low "E" coating
Low-conductance spacer
Thermaflect® Low “E” glazing system—the lowdown on high performance.
The latest generation in the evolution of CertainTeed’s high-performance glazing system options, including proprietary Thermaflect® Low “E” and warm-edge technology keep your home comfortable and energy efficient. The Thermaflect® glazing system meets ENERGY STAR® guidelines for energy efficiency in all US climate zones, and these latest advancements deliver optimum performance under the widest possible range of conditions. A combination of an insulating frame and sash, fusion-welded construction, continuous weather stripping and integral glazing resists air and water infiltration nearly 100% better than the minimum AAMA/WDMA standards.
A detailed system for innovation, quality, and comfort.
Thermaflect® is not an isolated innovation. It’s a uniquely designed system that truly gives you the best balance of performance attributes. An approach in which every detail counts, and combines:
• “Honeycombed” airspaces and fusion welding in the frame and sashes.
• Double-pane insulating with Low “E” on the inside surface and filled with argon gas.
• Low-conductance material spacer between the two panes.
• The result is increased insulation value, increased warmth, and decreased condensation.
Performance Standards

ENERGY STAR®
Established by the US Department of Energy and the Environmental Protection Agency, the ENERGY STAR® program defines thermal efficiency levels for three different climate regions of the country. The regions are divided by their need for reducing heating costs (northern), reducing cooling costs (southern), or providing the best balance of savings for both (north/central and south/central). Products receive an ENERGY STAR® label for the region or regions for which they qualify.
It’s easy to remember that CertainTeed windows with the Thermaflect® glazing system have qualified for the ENERGY STAR® label in every region.

NFRC label lets you compare.
The National Fenestration Rating Council (NFRC) sets standards for reporting energy performance information based on independent testing, so you can compare windows with confidence. In fact, this is the data that the ENERGY STAR® ratings are based on. When you compare, you’ll see that CertainTeed windows are among the leaders in thermal efficiency. What’s more, they transmit a high level of visible light for a natural view, and they beat industry standards for air leakage by 100 percent. Learn the measurements that matter:
• U-value measures heating efficiency.
This is a window’s ability to block the flow of heat through the glazing system,
and retain the heat in the room. The lower the U-value, the better the eciency.
For an easy reference, CertainTeed’s proprietary Thermaflect® Low “E” glazing
system with a low-conductance spacer and argon gas between the panes has
a U-value of 0.32, so it is almost twice as efficient as an ordinary double-pane
glass system with a rating of 0.50.
• Solar Heat Gain Coefficient measures cooling efficiency. This is a window’s ability to block the infrared heat from the sun, and maintain a cooler temperature in the room. The lower the coefficient, the better. CertainTeed’s Thermaflect® system has a rating of 0.27, so it is more than twice as efficient as an ordinary double-pane glass system with a 0.58 rating.
UNI Exteriors is known for:
• On schedule completion.
• The finest customer service in the industry!
• Final product exceeding expectations.
• Honesty, integrity, and great value.



