Your decision to install replacement windows is not just about saving money, increasing your home's value, or even beautifying your living space. You are making a commitment to be more ecologically mindful. Going green will not only help preserve the plant, but can save some money on your energy bill. Learn about the energy efficiency ratings on your replacement windows to maximize your eco-friendly and money-saving impact.

What Are ENERGY STAR Replacement Window?

Most states don't have stringent energy codes with respect to building materials. Even if a state does require minimum energy efficiency, a shortage of workers makes enforcement of the codes difficult. ENERGY STAR is a voluntary energy rating program that allows builders and contractors to go above and beyond state energy efficiency codes. An ENERGY STAR certified replacement window should save you money on heating and cooling, protect your interior from sun-damage, and reduce your overall energy consumption. All ENERGY STAR windows are NFRC rated.

Who Is the NFRC and What Do They Say about Energy Efficiency?

The National Fenestration Rating Council (NFRC) created an industry-wide system for labeling and regulating windows. Customers can better compare energy efficiency using the NFRC's system of R values and U factors.

The R Value:

R value measures how much heat or cold can transfer through a particular part of the window. It ranges from 1 to 99, with higher numbers being the best insulators.

The U Factor:

The U factor measures the window's overall insulation ability. Unlike the R value, you want a low U factor for your replacement window. On the scale of .01 to .99, the lower number the better.

Sources:

• Voluntary Energy Rating Systems
• Renewal by Anderson Energy Efficiency

About the Author
Ellen Foster is a freelance writer and teacher. She has worked with students aged five to forty-five.