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Which window is best

Posted by Ed Fowler on November 26th, 2002 07:48 AM
In reply to Vinyl vs. wood windows by Christa on September 10th, 2002 04:39 PM [Go to top of thread]

Most major brand windows have a NFRC label which tells you it's insluting value. Most important is the U-Factor, the Lower the U-Factor the better.
You can determine the R-Factor by dividing 1 by the U-Factor.
Example: 0.32 U-Factor
1 divded .32= 3.125 R-Factor

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