How Indow Inserts Work

Indow authorized dealer

Our energy-efficient acrylic inserts are an excellent alternative to window replacement, saving energy costs, blocking noise, and aiding in the preservation of historic buildings. These inserts eliminate drafts and increase the R-Value of insulation so when used with single-pane windows they will perform as well or better than modern double-pane windows.

woman pressing Indow
Insert in window closeup

Why Choose Indow Window Inserts

Save Money & Get Comfortable

Boy next to cold window
Keep the cold drafts outside

Indow laser-measured custom-fit inserts seal off the window openings from drafts keeping you more comfortable.

The tight fit and additional insulation allow your heating and cooling system to work less which saves you money year-round as much as 20%.

Reduce Noise

Noisy then Quiet
Block noise up to 70%

Indow window inserts reduce noise as much as 70%. These acrylic inserts create an air-gap between it and the primary glass windows, which dampen outdoor noise such as traffic, neighbors and construction.

Reduce Condensation

Insert on left No insert on right

In most cases, Indow window inserts can greatly reduce or eliminate unsightly condensation on the cold surfaces of glass window thus preventing wood rot and mold.

The acrylic insert blocks the warm moist air created in living space from reaching and creating condensation on the cold glass window.

Preserve Historic Buildings

Ideal for adaptive reuse projects

Retain your building’s aesthetics and architectural charm while improving its efficiency and your comfort. As many historic districts prevent the alteration of windows, our inserts are nearly invisible from the outside.

It’s a good way to preserve historic tax credits.

Cannot be seen from the outside
Virtually disappear from the inside

Acrylic & Tubing Options

Let us help you find the acrylic grade that meets your needs:

Standard Grade – our baseline product, clear 1/8″ nominal thickness

Acoustic Grade – Reduces noise up to 70%, clear 1/4″ nominal thickness

Commercial Grade – Extra abrasion and chemical-resistant coating. Ideal for applications where cleaning staff may use ammonia-based cleaners.

Other grades available such as museum grade, privacy and acoustic commercial.

Acrylic window choices

Choose your tubing color to match your window trim.

The Indow inserts virtually disappear from view.

Tubing colors Indow
Choose white, brown or black
Indow in window from inside
Inserts blend into window frame