Wausau, Wis.-based Wausau Window and Wall Systems has announced
that its 2250 series windows have earned certification by the
National Fenestration Rating Council (NFRC) for energy performance.
The windows are listed in the NFRC Product Directory in the categories
of casement, fixed and projected windows. Wausau says the series
also meets commercial building criteria for the Pacific Northwest
According to Wausau, the 2250 series is a line of pre-engineered,
aluminum windows that feature thermal breaks for increased performance.