Alpen Fiberglass Windows-Leading the High-Performance Race

Alpen’s business is split about evenly between residential and commercial window products. Most of Alpen’s windows aren’t quite as phenomenal as those on the north face of RMI, but they are still impressive. Increasingly, the company is combining suspended low-e Heat Mirror films with low-e

coated glass. For applications where heat avoidance is a priority (such as west-facing windows), the company uses Cardinal’s new 366 Low-E3 glass (see