How Low-E Glass Keeps You Cooler in Summer

Bright sunlight streaming into a living room interior with a parquet floor and couch through a large window with lens flare effect
Heat naturally flows from hot objects to cool objects, which is why an ice cube melts on a hot day, rather than becoming colder. During the summer, this spontaneous process can have a dramatic effect on the indoor temperature of your home as heat moves through glass into the cooler interior. Unwanted heat gain can happen in two ways: by sunlight shining directly on the windows, and when heat is radiated by your driveway, sidewalk, plants and other surfaces into your home.

The Power of Low-E Coatings

Low-Emissivity (Low-E) coatings are one of the newest innovations in window performance. On a sunny day, windows with untreated glass let in heat energy and make it difficult to control indoor temperatures and utility costs. Metallic Low-E coatings applied to the glass surface reflect outside heat and light from the sun, yet are so microthin you can still see through the window clearly! The reflective power of Low-E glass is important in climates where solar heat gain is a primary concern.

Sunrise Windows is committed to helping you achieve a more comfortable and cost-efficient home in every season. We start with insulated glass window units available in dual- and triple-pane constructions. Each glass pane is available with internal and external Low-E options.

Customize Your Glass

Latitude Glass by Sunrise provides many options so you can find the best choice for your home. Enjoy improved energy performance and control the amount of heat that enters your home, simply by choosing ENERGY STAR®-rated windows with Low-E glass from Sunrise. Latitude Glass options are available with all Sunrise products, including double-hung windows, casement windows and patio doors.


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For more information about Latitude Glass and assistance choosing the right glass option for your home, find an authorized Sunrise dealer near you.

About the Author

Joseph Mills

Joseph Mills

Joe Mills is the Director of Marketing for Sunrise Windows and Doors. He has spent almost 15 years working with homeowners helping them envision and design home improvement projects. He is proficient in assisting homeowners through their entire buying process, including helping them do the proper research, what signs to look for to minimize a homeowner’s risk, understanding the in home selling process and once the decision is made, how the installation process will work. He has written a consumer-oriented book called “How To Buy Vinyl Replacement Windows” that can help window buyers make educated choices.