Nordic Guard Windows provide state of the art technology for superior beauty, advanced energy efficiency, carefree upkeep, and excellent value.

Year Round Energy Savings

For many people, reducing energy costs is a primary reason for purchasing replacement windows. Windows are roughly 80% glass, so it’s important to choose the best glass system for your home and climate. Each window is built with a dual-pane insulating glass unit with double-strength glass.

Upgrading your windows to a high-performance ClimaTech® insulating glass package with Low-E glass, argon gas* and the Super Spacer System will further increase year-round energy savings. Low-E (low-emissivity) glass features a virtually clear metallic coating that allows warm solar rays to penetrate your home in the winter to help reduce heating costs. In summer, Low-E glass helps block solar heat to keep your home cooler and reduce airconditioning usage. Low-E also minimizes UV rays that can cause furnishings to fade.

nordic window diagram

Built for Superior Appearance & Durability

  1. The narrowline frame and sash create a clean-line, contemporary appearance with an expanded glass area. At the same time, internal chambers increase structural integrity, rigidity and energy efficiency.
  2. This innovative composite reinforcement allows for secure mounting of hardware and the non-conductive material helps reduce the transfer of energy.
  3. Increased strength and protection is achieved with the end-of-throw cam shift locking action. The low-profile design includes a “locked” indicator that tells you if your windows are left unlocked.
  4. Smooth and uniform, the true sloped sill quickly directs water runoff without the use of weep holes, keeping the exterior of the window clean and attractive. Our telescoping sill dam delivers a triple payoff: protection from air and water infiltration, increased structural stability and enhanced beauty.
  5. When extreme wind and weather hit, the sash-to-sill interlock stands strong. Traditional sloped sill designs can allow the sash to bow during powerful winds, but with our interlocking technology, the sash is channeled firmly into the window frame for a unified wall of strength. The compression bulb seal creates a snug fit that eliminates light penetration between the screen and frame. It also aids in easy screen installation and removal.

Choosing the Right Glass

All windows with insulated glass claim to save you money on energy costs. However, not all insulated glass windows are created equal. The key to choosing the right glass package for your home is to find the combination of performance values to suit your needs. At National Window Company, we know the correct glass to use and every window comes with an extremely energy efficient glass package.


Low-E Glass is a microscopically thin, virtually invisible, metallic layer deposited on the glass surface primarily to reduce the u-factor (lower u-factor = better insulation) by suppressing radiant heat flow. Low-E coating is virtually transparent to the solar spectrum (visible light and short-wave infrared radiation) and reflective of long-wave infrared radiation.


Performance is the Key


What is an NFRC Rating?

You should select windows that make the most sense for your climate. While some windows are better at keeping you warm, others excel at keeping you cool. Performance criteria are based on the climate zones and ratings certified by the National Fenestration Rating Council (NFRC).

1 U-Value: a measure of the rate of non-solar heat loss or gain through a material or assembly. Tests are usually performed under conditions which simulate 0˚ outside and 70˚ inside with a 15 mph wind. The lower a u-Value, the greater a window’s resistance to heat flow, and thus the better its insulating value. Actual u-Values are based on the glass family you choose.

2 Visible Transmittance (VT): This is the fraction of the visible spectrum of light weighted by the sensitivity of your eyes that is transmitted through the window. Simply put, it represents the amount of daylight that the window lets in.

3 Solar Heat Gain Co-efficient (SHGC): The fraction of solar radiation admitted through a window including what is absorbed and subsequently released inward. The lower a window’s SHGC, the less solar heat it transmits and the greater its shading ability. Different climates require different SHGC values for maximum efficiency.


Energy Star & DOE R-5 Windows

Our windows meet or exceed stringent ENERGY STAR requirements, providing triple-pane energy-saving performance in a dual-pane unit. The dual-pane, doublestrength insulated glass, thermally optimized frame and sash and non-conductive composite reinforcements deliver premium window performance with everyday affordability.

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