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What are the width and height requirements of my window?Updated a year ago

For installation in a single- or double-hung window (that opens vertically):

Minimum window width: 20 3/8"

Maximum window with: 39"

Minimum window height: 15 1/8"

For installation in a slider window (that opens horizontally):

Minimum opening width: 20 3/4"

Minimum window height: 15 1/8"

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