Using Low-E glass to manage heat transfer in your home

by Jan Kennemer 04/13/2025

Adding window film or special energy-efficient glass is an excellent way to reduce your monthly utility bill and regulate your home temperature. Both ultraviolet and infrared light may have a big impact on your energy bill, but with low emissivity, or low-E upgrades, you can enjoy notable energy savings.

Here is a basic guide to increasing your energy efficiency with low-E options:

What is low-E film?

Low-E window films decrease the amount of UV and infrared rays that pass through your windows. This film regulates the light and temperature of a space while still allowing natural light to shine through.

Low-E glass vs. low-E window film

Low-E glass can save you money. As it reduces UV rays entering the home, it also starts reducing your energy bill. Low-E film is a cheaper alternative, which can be a great project for DIY lovers. Low-E film will add an extra layer of protection in addition to what newer windows already provide. 

Low-E film for different climates

If you live in a colder climate, the solar heat gain coefficient (SHGC) of your glass or film should be higher. SHGC is the amount of solar radiation that can permeate through a window. 

Installing low-E film or windows allows you and your household to enjoy outside light without extra UV rays. Not only will they regulate the heat of your space, they’ll help you save energy.

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About the Author
Author

Jan Kennemer

Jan will show you how you can live close to Washington, DC – by public transit and/or highway – and still enjoy all the many amenities and friendliness of a quiet community. Jan is a life-long resident of Arlington, Va. So, she is very familiar with northern Virginia …Arlington, Falls Church, Alexandria and close-in Fairfax. She knows where to find those little out-of the-way places where you will still get excellent value and a home that meets your needs. As a Realtor® for over 20 years, Jan has developed a customized system for marketing and selling properties which includes the latest technologies combined with tried and true practices. She has received special training in working with first time buyers, repeat buyers and seniors. She is a certified VHDA trainer and is certified as a Senior Real Estate Specialist (SRES©). Jan is also a certified e-Pro. She gets results you want – the best price in the shortest time. Jan is dedicated to helping clients satisfy their needs and wants while providing them with a strong investment for the future. She is readily available to provide explanations and information. She won’t push you into making an uncomfortable choice. Jan helps you to fully understand the transaction, so that you can always make an informed decision based on facts and figures.