PITTSBURGH--(BUSINESS WIRE)--Replacing drafty, single-pane windows with energy-efficient windows is a smart way to improve the energy efficiency of existing buildings while also improving occupant comfort. Graham Architectural Products has launched GThurm – a line of high-efficiency windows that are notable for a number of reasons, among them, their use of pultruded polyurethane composites for the lineals. The first commercial installation of the GThurm windows took place in late 2010 at the Bayer CropScience LP Clayton (N.C.) Development and Training Facility. A total of 76 windows were replaced at the building, which is roughly 50 years old. The before/after difference was immediately noticeable, according to John Rock, who was the site manager at Clayton during the time of the installation.
