Calabasas | Beverly Hills

How to Choose the Most Energy-Efficient Windows for Your Home

by Mina Kuper 05/01/2022

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

Mina Kuper

Growing up in New York Mina Kuper had dreams of owning real estate, but never thought she might actually become a respected leader in the real estate industry someday. You cannot always predict where or when you will discover what you are meant to do in life!  

Mina was taught at an early age that if you want something in life, you have to work for it. Her parents came from Eastern Europe and had to learn how to excel to help others. She followed their example, making a point of working hard at everything she did.   

Never wavering in her resolve to become the best version of herself with each career move, she worked her way up from launching a Rental Department in a startup Real Estate office to becoming a successful New York Real Estate Broker. In 2001, she moved to Los Angeles where she became a California Real Estate Agent. Mina is a licensed real estate agent in Arizona.

As her career advanced, Mina found her stride working with multiunit, commercial,1031 exchange, and single-family properties, divorcing couples, trusts, and probate real estate – In addition, she has earned a Certification in Trust and Probate Real Estate and completed speaking engagements on Negotiation at area law schools. Her expertise in all these areas has not only set her apart from other agents but has also proven to be a real benefit for her clients. Mina donates a portion of her proceeds to animals and children causes. They don’t have a voice but she does.