How to Choose Eco-Friendly Windows and Start Saving Green

by Judy Szablak 10/10/2021

If your energy bills are high, your windows could be partly to blame. Windows allow the sun’s heat to warm up your home in summer, which means your air conditioner has to run more. Windows can let cold air in during winter through drafts while heated indoor air seeps outside, causing your furnace to run more. In fact, this loss and gain of heat through your windows can account for 25 to 30 percent of your energy bills. You’re more likely to have these problems if you have older windows. Replacing them with energy-efficient windows can help you use your heating and cooling systems less and save money on your energy bills. Keep these tips in mind for choosing energy-efficient windows.

Decide on a Frame

The right window frames can improve the energy efficiency of your new windows. You should choose a material that offers higher thermal resistance, since this results in less heat loss. Vinyl, composite, fiberglass and wood frames all offer better thermal resistance overall, while metal or aluminum frames offer lower thermal resistance. Fiberglass frames, in particular, offer higher thermal resistance since they can be filled with insulation.

Consider Insulated Windows

Energy-efficient windows sometimes have two or more glass panes rather than a single pane. The space between these panes provides insulation, which helps lower the window’s U-factor and SHGC. The U-factor refers to non-solar heat flow, while the solar heat gain coefficient (SHGC) refers to how much solar heat passes through the window. Windows with a lower U-factor have better energy efficiency. Windows with a lower SHGC can help homes stay cooler in summer, while a higher SHGC can help homes stay warmer in winter. The most suitable SHGC for your windows depends on your local climate and other factors.

Choose Low-e Coatings

Low-emissivity (low-e) coatings on windows provide more control over how much heat passes through the glass. These coatings lower the window’s U-factor and can also provide a low, medium or high SHGC as needed. Low-e coatings can increase the cost of energy-efficient windows, but they also help reduce energy usage, leading to lower energy bills throughout the year.

Look Into Spacers and Gas Fills

Gas fills and spacers can make windows even more energy-efficient. Spacers help improve the performance of glazing by making sure different layers of it are correctly distanced. Gas fills, such as argon and krypton, help keep heat transfer between the outer and inner layers of a window to a minimum. This helps keep solar heat from warming up your home in summer and reduce the loss of heated air from inside your home in winter. Krypton offers a better thermal performance, while argon typically costs less.

Select a Window Type

The types of windows you choose for your home can affect their efficiency. Some types of windows offer better energy efficiency than others. For example, single-hung and double-hung windows usually have higher air leakage, making them less energy-efficient. Casement, awning and hopper tend to have lower air leakage, which makes them a better choice for reducing energy usage. Air leakage allows hot air inside in summer and cold air inside in winter, which can lead to higher energy bills as your air conditioning and heating need to run more often. Choose windows that are known for having lower air leakage to ensure greater energy efficiency.

About the Author
Author

Judy Szablak

With over 30 years in the industry, Realtor Judy Szablak has been on national television for her real estate expertise on the HGTV Network, featured on Martha Stewart Living Radio "Morning Living” , NPR radio as an expert real estate panelist, It’s Relevant News channel, and quoted in the Wall Street Journal for her in depth knowledge of Fairfield County Connecticut real estate.

She was also on the local NPR radio station (WSHU) as a Fairfield County CT real estate expert. Judy has provided multiple online respected news sources with her real estate expertise including The Daily Easton, The Daily Weston, The Daily Fairfield, The Daily Stamford and The Daily Greenwich, as well as in print in the New York Post. She is a weekly Real Estate Columnist for WestportNow.com, another real estate column "Real Estate With Judy” is syndicated through Hearst CT Media Online and seen in The Connecticut Post, The Danbury News-Times, The Stamford Advocate, The Greenwich Time, The Hour, Fairfield Citizen, Westport News, Darien News, New Canaan News and the Wilton Villager.

 Judy is also the author of the book, The Art of Buying or Selling a Home, available at all major book retailers. Additionally, Judy has been nationally recognized in a number of national real estate trade magazines, some with distribution to over 1 million members. She was featured in Real Estate Today as early as 1994 for her commitment to, and implementation of technology in real estate. Judy appeared in the Certified Residential Specialist Magazine, as she provided advice on marketing strategies and ethics in the article titled "Marketing Makeovers.”

 Judy was also featured in REALTOR® Magazine, regarding image enhancement for Realtors. She was again featured in REALTOR® Magazine, in an article on "Achieving Flow” and operating at optimal peak performance. In another article in the same publication, Judy offered guidance to fellow real estate professionals as she explored the topic of implementing and maintaining personal websites. She has appeared in The Council of Residential Specialists Magazine, which featured her ideas regarding technology. Additionally, Judy authored an article on marketing and technology for the Certified Residential Specialist (CRS) Online Magazine. On two occasions, in 2015 and 2017, she appeared as a featured agent in Top Agent Magazine. I have a few other websites- www.TheCtrealtyBlog.com www.CtHomesAndRealEstate.com www.BestWestportHomes.com www.ThePetitePowerhouse.com www,SzablakConsulting.com