What are Indow Window Inserts?

Indow Inserts are an ingenious solution to a few different problems. They are inserts you can place inside your windows to reduce noise and drafts. They emulate double pane windows but come at a fraction of the cost. Each window is precisely laser-measured for a custom fit. You can easily take out the inserts, too!* 

Indow Windows are window inserts made out of acrylic glazing and edged with our patented Compression Tube. The tubing compresses when pressed inside your window, holding the insert securely in place while sealing out cold drafts and hot air. The tight custom seal delivers superior performance.


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The tight seal between the Compression Tube and your window frame provides exceptional performance, keeping at bay cold drafts (ormitigating heat gain during the summer). Indow storm window inserts provide superior comfort no matter the weather or temperature outside.


Indow storm window inserts offer remarkable sound reduction. When placed over an operable single-pane window, our Standard Grade inserts dampen noise by up to 10dBA, which equates to a 50% noise reduction. Acoustic Grade inserts reduce noise by up to 18.9 dBA, equivalent to a 70%+ reduction. Hush the sounds of traffic, planes and early-morning garbage collection so you can sleep and live comfortably.

Indow window inserts have 94% of the insulation of standard double-pane windows. The surface of an acrylic Indow insert is much warmer than the surface of a pane of glass, so you’ll feel warmer even if the air temperature in both cases is the same.

** R Value measures the thermal resistance of a material and its effectiveness at keeping the outside out and the inside in.