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Interior windows mount inside your home to block drafts, reduce outside noise and increase energy efficiency.

  • Easy to install inside the home and fits almost any window
  • Window tilts in for cleaning and access to prime window
  • Balanced for smooth operation
  • High performance Low-E glass makes your home more comfortable and reduces fading

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Learn how to measure and install

B E S T

ComfortSEAL

i200_studio
Single Hung
Widths: 18" - 54"
Heights: 23" - 90"
i600_studio
Slider
Widths: 25-1/2" - 90"
Heights: 14-1/2" - 63"
i500_studio
Fixed
Widths: 12" - 80"
Heights: 12" - 80"
ComfortSeal features 10 min install, 50% sound reduction and reduces drafts by 75%

Warmer Winters Cooler Summers Quieter Rooms

ComfortSEAL

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1 Based on STC testing performed by an independent laboratory of a Larson I200 window installed with a 2" airspace over a wood primary window with 1/8” glass and 3/4” insulated glass with two panes of 1/8” glass. Actual results may vary based on the existing window and types of noise present.
2 Based on air leakage testing performed by an independent laboratory of a Larson I200 window in accordance with AERC 1.2 Physical Test Methods for Measuring Energy Performance Properties of Fenestration Attachments. Actual results may vary based on the existing window.