Southwall Technologies, the worldwide innovator of high performance, energy-saving films and glass products, announced the ability of Heat Mirror(R) insulating glass to insulate against heat loss at a record breaking R-20/U-0.05 insulation value.

R-20 Heat Mirror insulating glass consists of three heat reflective coated films mounted inside an insulating glass unit between two pieces of low-e coated glass. This super insulating glass construction creates four heat-impeding gas-filled cavities and achieves R-20 performance when used in conjunction with a thermally insulated fiberglass frame. Heat Mirror R-20 is a product of Alpen Energy Systems, a leading Southwall customer licensed to fabricate Heat Mirror insulating glass, reveals the company’s press release.

Superior to any low-e glass currently available, Heat Mirror is a technologically advanced low emissivity and solar reflective film that can be mounted inside an insulating glass unit in a variety of configurations (one, two or three coated films, uncoated or low-e coated glass) to provide energy conservation performance ranging from R-6 to R-20 to meet the unique requirements of commercial and residential new construction and renovation projects. Heat Mirror insulating glass, as well as other innovative glass technologies currently under development, is driving the US Department of Energy to revise the glass performance standards of its Energy Star program that rates the energy efficiency of appliances and building components.