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Breathable Secondary Window Retrofit (SWR) System

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Easily Upgrade Non-Operable Windows from the Interior Without Replacement

Easily transform existing fixed windows from single to double-pane, or from double to triple-pane, without any removal or replacement.

Patent-Pending Interior Easy-Retrofit System

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Breathable

  • Uniquely engineered solution eliminates dust and heat build-up that could cause thermal stress, fogging and condensation

  • Installs quickly and cleanly from the interior without having to drill or alter any parts of the existing window system

Elegant

  • Ultra-slim profile maintains the daylight opening

  • Available in multiple color options to match the original framing

  • Tailored to the unique existing window conditions

SWR Performance

2-10x added insulation 

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Up to 40% energy savings

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65%+ outside noise reduction

Existing
+ SWR
+ SWR-IG
+ SWR-VIG
Glass
Single-Pane, Clear
Single-Pane, Low-E
Double-Pane, Insulating Glass, Low-E, Argon
Double-Pane, Insulating Glass, Low-E, Vacuum
U-Value (Total)
0.97 Btu/hr ft2 F, 5.52 W/m2 K
0.42 Btu/hr ft2 F, 2.39 W/m2 K
0.29 Btu/hr ft2 F, 1.71 W/m2 K
0.22 Btu/hr ft2 F, 1.18 W/m2 K
R-Value (CoG)
1
3
6
13
SHGC
0.73
0.41
0.19
0.21
VLT
0.76
0.38
0.3
0.27
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Up to 10x Faster Payback than Replacement 

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