IndowONE is a single integrated interior window insert solution with multiple acrylic grade options rather than separate standalone systems. It works by combining a custom-cut acrylic panel, an air space between the insert and the existing window, and compression tubing that presses into the existing frame to create a near airtight seal.

- Custom-made to exact window measurements - Near airtight seal using compression tubing - No tools or frame modifications required for installation - Designed as an alternative to replacement windows at a lower stated average cost

seal / upgrade your windows

Indow's Thermal Inserts and Acoustic Inserts can allow for an average 20% energy savings.

- Reduces energy loss through existing windows, which supports lower heating and cooling energy use.

Embodied Carbon

Existing building retrofit

A compatible frame step must have 5/8 inch of flat space for inserts, at least 1/2 inch of space from the window glass, and no obstructions such as shutters, shades, handles, cranks, or locks.

Existing windows with a compatible interior frame step and enough depth to create an air space between the existing glass and insert; 1 to 4 inches from the glass is noted as better for acoustic performance.

Minimum project size

Ideal project size

A laser measurement kit or tape measure is used to submit window measurements; Indow recommends its cleaning kit for cleaning inserts safely.

Installation contractor availability in NY

If blinds are installed at the top of the frame, 1.25 inches of flat space is needed, and the frame step must be unobstructed.

U.S. Department of Energy; Pacific Northwest National Laboratory; Bowdoin College; This Old House

Case studies.

Installation is simple, with no tools or modifications to existing window frames, and inserts slide into place in seconds.

Reduced drafts, more stable indoor temperatures, lower outside noise, and prevention of condensation.

Eligible incentives and financing resources in New York

IndowONE inserts on average cost $372. Pricing starts at $28/sf for Thermal Inserts, $36/sf for Acoustic Inserts, $36/sf for UV Blocking Inserts, $27/sf for Sleep Panels, $36/sf for Privacy Inserts, and $40/sf for Commercial Inserts, based on orders of 10.

Ongoing Costs

Payback period

User Learning Curve/Operational Efficiency/Staff Time

Service or maintenance contractor availability

Data Visibility (into building operating systems)

Indow inserts help prevent condensation, inserts block moisture from reaching window panes.

IRA Manufacturer Certification, AERC certified