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Master Window Repair Inc

    Window Terms Glossary

    Head: Main horizontal frame member at the top of a window or door.

    Head Expander: u-shaped extrusion slipped over the frame head that, when pushed up, closes the gap above the window after a window is installed.


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    Windows:

    Header: horizontal framing member placed over the rough opening of a window to prevent the weight of wall or roof from resting on the window frame.

    Heat gain: The transfer of heat from outside to inside by means of conduction, convection and radiation through all surfaces of a house.

    Heat loss: The transfer of heat from inside to outside by means of conduction, convection, and radiation through all surfaces of a house.

    Hinge: A movable joint enabling a window to swing open.

    Hopper: A window unit in which the top of the sash swings inward.

    Horizontal Slider: A window with a movable sash that slides horizontally.
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