Insulating Window Film

Heat lost or gained through windows accounts for over 30 percent of all the heating and cooling energy used in homes and buildings in the U.S. The 3M Thinsulate Window Film Climate Control Series aims to rectify that. Thinsulate provides the same benefits of 3M Sun Control Window Film by rejecting heat and blocking UV rays, but it also works to protect against heat loss during cold weather. The film, applied directly to existing windows, is faster and less expensive to install than replacing windows and is almost as effective as an extra pane of glass, the company says. Despite being almost completely invisible, up to 99 percent of UV rays are blocked, which helps to protect artwork, furniture, hardwood floors, and window treatments.