Energy-efficient bay, sliding and casement windows offer many benefits to homeowners who need to replace aging panes or outfit a new residence. Low-emissivity coatings, high-quality seals and new glazing methods make today's windows an integral aesthetic and functional part of any structure.

Qualities of Energy-Efficient Windows

1. U-factor--A lower U-factor means that an opening is more resistant to heat flow in and out of a building. Panes must have a U-factor no higher than .30 to .40 (depending on the climate region) to be considered energy efficient.
2. Solar Heat Gain Coefficient (SHGC)--To reduce the cost of heating, residents should purchase windows with a high SHGC. Those in warmer climates should look for a lower SGHC. The higher the SGHC, the more solar warming is achieved through an opening.
3. Visible Transmittance (VT)--Homeowners should choose windows with a higher VT when they want to maximize natural lighting and increase the visibility of surrounding views.
4. Air Leakage (AL)--While there is no required AL rating for windows to be considered energy efficient, windows with an AL of .30 or less are more likely to lower utility bills by reducing airflow around the seal of an opening.

Brothers Home Improvement, Inc. has selected the best components from time-tested suppliers to formulate quality, energy-efficient vinyl windows and fiberglass door products. Serving homes in Northern and Southern California and Northern Nevada, Brothers is a family-owned, family-operated business dedicated to customer service. The company's vinyl and fiberglass products come in a variety of colors to complement trim colors and home design. Representatives can be reached at 800-672-3777 for information on bays, sliders and casements specialized for Auburn, California and the West Coast region.