I have been researching on the web and the discussion boards various windows and the costs involved. I checked out Simonton 5500 yesterday at a store in Central Jersey and I liked them. The other windows I liked are BFRich (local installer recommendation) and Schuco (very expensive). Here is a question. I noticed that the DP rating of the Simonton 5500 is only DP-25 while the DP rating of the BFRich DP-50. The U-factor, SHGC and other factors are comparable. Did anyone else look at the DP factor? WHy is there is a difference like this?
Any help will be greatly appreciated.
DEsign pressure rating (DP) for Simonton 5500, BFRich etc.
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