Every Thursday leading up to USGlass magazine’s 50th Anniversary celebration in August, USGNN.com™ is taking a look back at past issues and highlighting advertisements, stories and images that ran throughout the publication’s half-century life. This week, it’s about energy efficiency in the ’70s.

Energy performance in fenestration has been a hot topic in the industry for quite some time now. Four decades ago, companies were running ads focused on their products’ ability to conserve energy. Check out the two below.

Schlegel (March 1977)

“Fin-Seal weatherstripping can help you and your dealers meet today’s tighter thermal standards … satisfy energy conservation demands … and increase your profits,” reads the Schlegel ad (above) reads.

ASG (July 1975)

“We’ve designed Tru-Therm to save 2 of the scariest things in today’s world. Energy and money,” the ASG ad (above) reads.

What do you think? What has changed the most since then, and what would you like to see in a future edition of Throwback Thursday? Leave your thoughts in the comment section, and we’ll see you next week.