WinDoor Thermally Broken Double Hung WinDow Series 9040

Our Thermally Broken Aluminum WinDows are attractive, energy-efficient, and reliable. The most important consideration in selecting a good WinDow is its thermal efficiency, its ability to minimize heat loss from the inside or heat gain from the outside. Today, our Thermally Broken Aluminum WinDows & Doors are manufactured with 3-composed pieces: an outer and inner extruded frame. The center central I-Strut core acts as a barrier to heat flow from a warm interior to a cold exterior in winter and vice-versa in summer. This construction creates a highly thermally efficient frame, and enables our products to take advantage of other important aluminum properties such as… durability, strength, stability and corrosion resistance.

The 9040 Double Hung WinDow has an authentic historic style along with a twist of modern innovation. In fact... Modern Innovation is one of the best things WinDoor Incorporated is known for.

• Aluminum Frame Maximum Size 60" x 99"
• Design Pressures +120 / -150
• Air .005 C- .024 AW
• Water Test 20 psf
• NFRC Certifications: U-Values as low as .37 / SHGC as low as .12
• Acoustical Certifications: STC Rating 39
• Even Bomb Blast Tested: A.T.F.P Anti-Terrorism Force Protection