Thermwell V76H Shrink Window Insulation Kit 84x110 in

Product Description

The THERMWELL V76H is an indoor shrink window insulation kit sized at 84 inches x 110 inches, designed for patio doors and large windows. The kit includes a crystal-clear plastic sheet that shrinks tight and wrinkle-free using a standard handheld hairdryer — no special tools required. Once applied, the film creates an insulating air barrier that reduces drafts and heat loss around large glazed openings. HVAC technicians, weatherization contractors, and experienced homeowners install this kit as part of seasonal energy-efficiency work or interim draft control while awaiting window replacement.

This kit is suited for large residential or light-commercial window and door openings up to 84 inches x 110 inches. It installs directly on metal frames, painted wood, varnished wood, or vinyl-clad frames using the included double-faced tape. The application is interior-side only and is commonly used during heating season to reduce infiltration at oversized patio door frames or picture windows where standard-sized kits fall short.

Key Features

• Crystal-clear plastic sheet shrinks tight and wrinkle-free with a handheld hairdryer
• Large format coverage: 84 inches x 110 inches — sized for patio doors and oversized windows
• Installs on metal, painted wood, varnished wood, and vinyl-clad frames
• Includes double-faced mounting tape for adhesion to multiple frame types
• Interior installation — no exterior access or ladders required
• Removable at end of season without damage to most frame surfaces

Compatibility

Designed for interior installation on patio doors and large windows with frame openings up to 84 inches x 110 inches, compatible with metal, painted wood, varnished wood, and vinyl-clad frame materials.

Installation Notes

This product is installed by weatherization technicians or qualified trades as part of a draft-sealing scope. Clean and dry the frame surface thoroughly before applying the double-faced tape to ensure proper adhesion. Use a handheld hairdryer on a low-to-medium heat setting and work in slow, even passes across the film surface to achieve a wrinkle-free seal — avoid holding the dryer in one spot to prevent film damage. No cutting tools or fasteners are required for standard installation.