• The Insulator 8100 HM is our best-insulating window, up to 128% more energy-efficient than a standard double-pane window, and 44% to 116% better than one with low E and argon gas. Ask about our fuel savings guarantee.
• Our quietest window, blocking 85% of all outside noise
• Our most exquisite window with a beautiful architectural frame
• Both sashes tilt in for easy cleaning
• Screen and heavy duty locks included
• Lifetime factory guarantee – glass breakage included

*Standard installation includes removal of old windows.
Minimum purchase of 5 windows required.

**UI stands for united inches, meaning the window width
plus height (i.e. a 36” x 54” window equals 90 UI; 36 + 54 = 90)

Learn more about Heat MirrorTM