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Manufacturer's Product Description
Patio doors (also called French doors if they open to the outside) can be made from one or two leafs. Each leaf can be up to four feet wide. We offer low, thermally broken aluminum thresholds on all our units for no extra charge.
Patio doors are the recommended door type for openings of up to about seven feet width. In addition to being a great door, most Patio doors can also tilt _ a great option for night ventilation.