IndowONE Product Data

Indow window inserts are an acrylic glazing edged with our patented Compression Tube that presses inside a window frame without requiring the installation of a mounting bracket.

Performance DataSingle-pane WindowDouble-pane WindowIndow insert + Single-pane
Sealing Out Drafts & Heat.5 CFM-Very Drafty.1 to .3 CFM.024 CFM
Thermal Insulation (R-Value / U-Value)R-1.0 / U-1.0R-2.0 / U-0.5R-2.3 / U-0.43
(Equivalent to Double-pane)
Noise ReductionBaseline20%-30% Reduction
from Single-pane
50%-70% Reduction
from Single-pane
LeadNo IssuesEPA lead containment regulations applyNo Issues
Visible Light Transmittance74%51% to 81%64%
Solar Heat Gain Coefficient.72.42 to .75.57

Indow insert + single-pane performance numbers are from independent testing conducted by the Attachments Energy Rating Council (AERC). Actual performance will vary depending on the condition of the single-pane window and its frame depth.

Acrylic Types

All types come with Compression Tube color options: brown, warm white and black. Custom colors are available for large commercial orders. Call to inquire.

  • Standard Grade (STD)

    Our baseline product. The clear nominal 1/8" thick acrylic panel provides a great balance of comfort, efficiency, and noise dampening at an affordable price.

  • Acoustic Grade (AG)

    Reduces noise coming through operable single-pane windows by 18.9 dBa, which “feels,” subjectively, like a 70% reduction in noise. Reduces noise coming through double-pane windows by 10 to 12 dBA, equivalent to a 50% reduction. STC rating of 42-45 with double-pane windows. Available in Commercial Grade.

  • Commercial Grade (CG)

    Have an extra abrasion-resistant coating to provide additional protection against scratching (moving and frequent cleaning). Safe to use cleaners such as Windex. There is no visual difference between the Standard, Museum and Commercial Grade acrylic.

  • Museum Grade (MG)

    Protects furniture, carpets, and artwork by filtering 98% of all UV rays from sunlight coming through windows. There is no visual difference between the Standard, Museum, and Commercial Grade acrylic.

  • Sleep Panel (SP)

    These panels block all light coming through your windows and provide the acoustic dampening and thermal insulation of Standard Indow inserts. Ideal for light sleepers, night-shift workers, newborns, and home theater audiophiles.

  • Privacy Grade (PG)

    Translucent acrylic diffuses light transmission while blocking details and defined shadows. Great for bathrooms.

Maximum Sizes

4x8 Sleep Panel, Privacy 6x8 Museum 6x8, 5x10 Standard, Acoustic, Commercial, Commercial Acoustic. Call to inquire about larger sizes and Mullion Kits. See Mullion Kit Product Sheet for details. Skylights are limited to 2x6 or 3x3.

Acrylic Weight (Approximate)

Nominal 1/8" = 0.72 lb./sq. ft. Nominal 1/4" = 1.45 lb./sq. ft.

Customer installs large Indow window insert.

Color Options

The Compression Tube is available in brown, light linen white, and black. Custom colors are available for large scale orders. Call to inquire.

Image shows insert tube color samples which come in white, brown and black.

Compatibility

In order for Indow window inserts to fit properly there must be an unobstructed flat surface perpendicular to the window pane with a depth of at least 5/8" that runs the entire perimeter of the window. We call this Frame Depth.

Common obstructions are inset window treatments (blinds), hardware, hooks, locks, and hinges. Blinds need an extra 3/5" gap between the insert and your window frame.

Solutions for less than 5/8" Frame Depth: In some cases, where there is less than 5/8", removing or replacing molding or installing a jamb extension can create room for the Indow inserts to fit. If the frame depth is just under 5/8", clear swivel clips (G) can be attached to the window frame to hold the Indow insert in place (see below). For complete solutions see our Frame Fit Kit.

Image shows swivel clip used to hold an insert when a Frame Step is less than 5/8 deep.

Product Features

  1. Acrylic Glazing

    A custom cut pane of acrylic forms the main component of an Indow insert and is available in a variety of grades to meet performance needs.

  2. Air Space

    An insulating layer of air between the existing window pane and the Indow insert. There needs to be ½" between the window pane and the insert, but 1-4" is better for acoustic performance.

  3. Compression Tube

    Silicone tubing with an ABS carrier around the acrylic glazing creates a tight seal and holds the Indow insert firmly in place. It is impervious to heat, cold, UV radiation and maintains its spring indefinitely.

Image shows cross cut of insert placed into a Frame Step to show the distance from the window to achieve best performance. The image also shows the Acrylic and tubing cross cut to share how they are made and fit together.

Additional Features

  • Image shows the back of an insert corner to reveal the corner cut which allows the insert to be easily adjusted when installed.

    Corner Cut Out

    A piece of tubing cut from each corner to prevent buckling. This faces out and is not visible from the interior. The elbow-shaped corner insert can be removed for flexible adjustments.

  • Image shows D-ring, used to remove inserts from a window frame.

    D-Ring

    A pull-ring is attached 4" above the lower left corner of the insert to aid in removal. Silver d-ring used for white tubing and black d-ring used for brown and black tubing.

  • Image shows a safety chain which is used for inserts larger than 8 square feet incase the insert is ever blown out.

    Safety Chains

    Used on windows larger than 8 sq. ft. to prevent the Indow insert from falling out of the window frame in the event of high wind pressure. The Safety Chains are inconspicuously anchored to the window frame by one small screw. Safety chains are not included on some Specialty Shaped windows.

  •  Image shows Skylight safety swivel clip used on all inserts to hold them in place when installed into a skylight.

    Skylight Safety Hardware

    Required on all skylight windows, using our swivel clips or retaining pins from our Frame Fit Kit.

  • Egress

    Indow window inserts comply with egress regulations. In an emergency, occupants should be able to quickly remove the Indow inserts without a tool. In a young child's bedroom, we recommend leaving one window bare with no insert installed.

  • Storage

    Many Indow window inserts can be left in place year-round with occasional removal for cleaning. If an Indow insert is removed for an extended period, proper storage is essential. For example, do not lean the insert or store in a way that compresses the tubing or bends the acrylic. See ‘Indow Care Guide' for complete storage and product care instructions.

  • Maximum Temperature Range

    Indow inserts should not be exposed to temperatures above 160°F (71°C) for continuous duration, or 180°F (82°C) for short, intermittent periods of time.

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Customer Reviews

Excellent
4.49 Average 1514 Reviews
Lyn K

I'm enjoying the units, however will need to wait until next year's colder weather to get a truer feel or read on how well they work - thanks

Posted 5 days ago
Glenn G

They work very well for my 3 Bedroom windows.easy to install.

Posted 1 week ago
Mike B

I purchased two Indow window inserts for two west-facing bedroom windows. These windows are exposed to the hot afternoon sun, making it difficult to cool the bedroom, and there is considerable outside noise. The Indow inserts work great at reducing the outside noise and keeping my bedroom cooler. I absolutely recommend Indow window inserts.

Posted 1 week ago
Ian W

Very professional from website to delivery and installation was well explained and easy. Noise reduction was quite noticeable and sealing from cold just as good if not better. Would recommend 100%.

Posted 2 weeks ago
Anonymous

Wonderful product

Posted 3 weeks ago
Tracie J

My husband and I can finally sleep all night without being woke up by outside noise! Indows are game changers if you live on a busy road, by a loud industrial business or just want a quieter inside environment. The customer service is pretty amazing too! Thanks Indow group for giving us back great sleep!!

Posted 1 month ago
Norbert M

fit perfect, weny in easyand make a diffrence with noise ,thank norbert

Posted 1 month ago
Jessica V

Easy DIY measuring, and an obvious immediate increase in warmth. Huge difference in a historic home with historic windows.

Posted 1 month ago
Anonymous

WE just took delivery of the two window inserts we ordered. they both fit perfectly. The most difficult part of the process was me trying to hold the laser measuring device still while taking the diaginal measurment! The Indow team was helpful and the ordering process was catch free. the finished product is just as they described. once installed, you can not even tell that they are there. I will warn you, if you have larger sizes they will come in a pretty large packing crate/box to protect them so be prepared. The only reason for 4 stars insted of 5 is they have just been istalled and we shall see how effective they are at reducing cold air, but they fit so snug that I anticipate they will be very effective. Just in time too, because our area is in a low temp/low wind chill pattern at the moment.

Posted 2 months ago
Craig F

The Indow I ordered was a perfect fit. It looks great and is an extremely well made product. The ordering process was seamless.

Posted 4 months ago
Catherine J

Noise reduction by at least 50%! I cannot hear most car that drives by now. My bedroom is so quiet! Thank you!

Posted 4 months ago
Walter M

Easy to order and install.

Posted 4 months ago
Dianne F

Window inserts help with sound since I live facing the street and the highway

Posted 5 months ago
Dianne

This is a 5 star company from beginning to end. I purchased the I inserts in 2017 because the bedroom on the second story faced the street. These are very effective for street noise. Noticed a problem on one of the windows recently and they quickly took care of it due to their warranty. Customer service personnel are very helpful. The price of the windows was acceptable for top quality of sleep and less noise during the day

Posted 5 months ago
Charles C

Recently purchased the acoustic window inserts for a couple of old windows facing a busy street and they've made a huge difference in terms of noise reduction! The measuring process was relatively easy with the laser measuring tool that Indow sent and the windows were delivered faster than expected. Martin was easy to work with and we would highly recommend Indow to those looking for window inserts.

Posted 7 months ago