There are many components to an energy efficient window. An energy rating for replacement windows is based on four primary characteristics: The u-factor, which determines how much heat can escape, the solar heat gain coefficient (SHGC), which determines how much heat can enter, visible transmittance (VT), which is the ability to see through the window, and air leakage (AL), which measures the amount of air allowed to flow through your window. Below is a brief guide on how to choose the right window according to these measurements how different construction elements affect each of them.
Having a low u-factor is less important in Orlando than it is in New York, because Floridians are primarily concerned with keeping heat out. In warmer climates, you can live efficiently and comfortably with window replacements that have a u-factor as high as .60. In colder climates, however, you'll definitely need a lower number.
- Solar Heat Gain Coefficient
The SHGC rating you choose will also depend on the climate you live in. In warmer climates like here in Florida, you'll want to stay below a .30 rating. Finding a window below a .27 will help maximize your energy efficiency.
- Visible Transmittance and Air Leakage
Energy Star doesn’t set limits on visibility or air leakage. Nonetheless, it's nice to have a high VT and a low AL.
The frame doesn't have to be made with a particular material, but it must meet quality standards for proper heat transfer and insulation. Fiberglass, vinyl, wood, aluminum, wood, composite, and combination frames can all qualify to be considered energy efficient when installed correctly.
Multiple pane replacement windows are much more efficient than their single-pane counterparts. Inert gasses fill the space between the panes to provide for additional insulation, keeping conditioned air inside and the uncomfortable air out.
A special coating on low-e glass helps to reflect light. In addition to helping keep your home comfortable, it protects your furniture from fading.
If you're ready to maximize your insulation and energy efficiency, then call Window World of Central Florida to learn about our replacement windows. Visit our website for more information.