Thermwell EZ833 Window Insulation Film Kit 62x126 in

Product Description

The THERMWELL EZ833 is a heavy-duty indoor window insulation film kit designed to reduce heat loss through drafty windows during cold weather months. The kit ships as a single roll measuring 62 inches wide by 126 inches long and is constructed from 1 mil film. When cut to size, one roll covers up to three standard windows. The kit includes extra-wide tape to create a more secure perimeter seal. Installed correctly, it can increase a window's R-value by up to 90 percent. HVAC technicians, insulation contractors, and knowledgeable homeowners install this product as a low-cost weatherization measure.

This kit is suited for residential applications where single-pane or older double-pane windows allow significant air infiltration or conductive heat loss. It is applied to the interior window frame during the heating season and removed when temperatures rise. Typical use cases include older homes, rental units, and any space where window replacement is not immediately feasible. The film is transparent once applied, minimizing visual impact. The included tape bonds to painted, wood, or vinyl window trim surfaces commonly found in residential construction.

Key Features

• Roll dimensions of 62 inches by 126 inches allow a single kit to cover up to three standard windows when cut to size
• 1 mil heavy-duty film resists tearing during installation and seasonal use
• Increases window R-value by up to 90 percent, reducing conductive and convective heat loss
• Extra-wide tape included for a more secure perimeter seal on standard window frames
• Interior application keeps the film protected from outdoor weather and UV degradation

Compatibility

Designed as an OEM-style replacement-grade window insulation solution compatible with standard residential interior window frames where indoor film kits are the appropriate weatherization method.

Installation Notes

Installation is typically performed by homeowners, maintenance technicians, or weatherization contractors and requires no special tools beyond scissors and a hair dryer for shrinking the film taut. Clean and dry the window frame surfaces thoroughly before applying the tape to ensure proper adhesion. Do not apply to wet or painted surfaces that are peeling, as bond strength will be compromised. Follow local energy code guidelines where weatherization work is subject to inspection.