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並前往http://www.easternarchitectural.com/blog/what-is-a-good-u-factor-for-a-window

What is a Good U-Factor for a Window? - Eastern Architectural ...

U -Factor values generally range from 0.25 to 1.25 and are measured in Btu/h·ft²·°F. Ideally, Florida homeowners should aim to have a U-factor under 0.30 paired ...

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