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U-factor:
a factor measuring heat transmission. Lower U-factor = better insulation.

Ultraviolet light (UV): invisible short-wavelength light. UV light causes fading of carpets, upholstery, and paint.

Unison lock: a lock, used with casement type windows, which locks in two places with the use of one handle.

Uniform building code (UBC): A building code established in 1927, replaced by the International Building Code in 2000. The purposes of these codes is to standardize building practices and increase safety.

 

 

 

 

 

 

 

 

 

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