LARSON comfortSEAL 22.62-in x 34.625-in Double Strength Aluminum White Window

Installs inside the window jamb over existing windows for instant draft and sound reduction

Proven to reduce outside noise by up to 50% and air leakage up to 75% by independent lab testing

Ultimate design features unique top hinge to allow for easy access and cleaning between windows year round

Single-hung sash is balanced for use over single-hung and double-hung exterior windows that move up and down

Installs in ten minutes with a few screws at the top track and bottom stops year round

Requires 1-1/2 inch depth inside the window jamb for proper installation

The Attachment Energy Rating Council certifies this product’s energy performance and rates as 82 out of a possible 110 in a dominantly cool climate and 15 out of a possible 55 in a dominantly warm climate