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Weathermaster 8100 Series

Heat Mirror 8200 Series Popular Science magazine’s Top 100 Inventions

  • 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
Heat Mirror Performance Chart
Compare a window with: 8100HM performs better by:
  SHGC U-Value
Clear insulated double-pane glass 128% 77%
Pyrolitic low E double-pane w/ argon 116% 37%
Soft-coat low E double-pane w/ argon 44% 15%


*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


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