Wind resistance measures each window"s ability to keep out drafts with 25 and 50 mph winds an an outdoor temperatures of 70º F. The Pella 250 Series is part of the Replacement Windows test ...
There is no question that Pella makes some of the best windows ... 250 Series, Encompass, Hurricane Shield Series, and Defender Series. They’re available in double-hung, single-hung, casement ...
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