Know Your Windows: Energy Efficiency & NFRC

Reference the Window Ratings for Energy-Savings

The energy efficiency of your home relies greatly on how well your windows perform. Unfortunately, the windows of your home may be outdated or damaged, causing them to do more harm to your energy usage than good. This is a problem that is best dealt with by professional replacement window installers. At Ultimate Gutter Guard of Birmingham, we have your window solution with our variety of high-quality replacement windows.

We offer our windows in a variety of styles and customizable options so you can create the perfect look for your home. In addition to the beauty our windows provide, they are also designed to be highly energy efficient and have even been Energy Star® certified. This means that they have surpassed the required governmental standards for energy efficiency. This is exhibited by the blue Energy Star® label on all of our windows; it can also be seen when you examine the National Fenestration Rating Council (NFRC) label.

Keys to Reading the NFRC Label:

  • U-Factor: The U-factor rating indicates the window’s ability to retain heat in your home, this directly relates to heat transference and how well the window’s build protects against it. Lower numbers between .20 – 1.20 are ideal.
  • Solar Heat Gain Coefficient (SHGC): This number indicates how well the window blocks UV rays. Protecting against SHGC protects against radiant heat transfer. A lower SHGC number between 0 and 1 means the window is rated for better SHGC.
  • Air leakage: The air leakage rating lets the homeowner know how much potential the hardware of the window has for permitting air to pass through it. This is measured on a scale of .1 to .3 and lower numbers indicate less potential.
  • Visible Transmittance (VT): The VT rating tells how much potential for “daylighting” exists in the construction. Daylighting is the amount of natural lighting that can pass through a window to illuminate the interior and is measured on a scale of 0 and 1. A higher number indicates more daylighting potential.

Removing the Effort from Your Window Decision

The purpose of labels like the NFRC and Blue Energy Star® label is to make the window buying process easier on the consumer. By informing homeowners of a window’s energy-saving qualities, we equip them the knowledge they need in order to make the best decision for their home. The best part of this is that they no longer have to rely on the word of a window salesperson. Instead, they can just examine the NFRC ratings and go from there. The window experts here at Ultimate Gutter Guard of Birmingham are well-informed of the qualities that our replacement windows possess so we can also help take the effort out of your window decision. Just contact us today to schedule your free window consultation.