How to Compare the Brands, Prices & Efficiency of Windows

Considerations

• Calculating a budget for window replacement should take into account both initial expense and future energy bill savings. Cheaper windows may cost more in the long run due to heat and cooling loss and elevated energy bills; more expensive windows may not offer energy-efficient features. Window frames also vary in material and in cost.

Terminology

• Choose a window with a low U-factor, or U-value, to maximize energy efficiency. The U-factor of a window measures heat loss. Windows may also have a separate U-factor for glazing. Some window frame materials are more efficient than others, as well. Materials include wood, vinyl, composite and aluminum. Some windows use gases to insulate your home, including gases like argon. A low-emittance coating or glaze on the window is often referred to as low-E coating or glaze.

Manufacturers

• Window manufacturers offer low- and high-end lines of windows, with a variety of frame and efficiency options. They also frequently offer customization options. Research quotes from area providers on comparable products before purchase.