In addition, the 4000 Series is the best-selling vinyl replacement windows and can be opened from the top or bottom sash, allowing fresh air to circulate throughout your home. Tilt-in sashes make cleaning a breeze and save you the time and frustration of exterior washing, especially on multi-level homes. Easily clean both the interior and exterior surfaces of your windows from the comfort of your home.
Most importantly you can maximize your energy savings by choosing a high-performance SolarZone™ insulated glass package to meet your specific climate challenges. The lower the U-Factor, the less energy you’ll need to maintain the temperature of your home. In warm climates, the lower the Solar Heat Gain Coefficient (SHGC), the more you’ll conserve on air-conditioning. In cool climates, the higher the SHGC, the more you’ll conserve on heating.