Double-Hung Window

Double-hung windows have two movable sashes that can be moved up and down, allowing ventilation at both the top and bottom. If you open both sides of a double-hung window sash halfway, it allows twice as much airflow as a single-hung window. The opening above the upper sash allows hot, unfresh air to escape, while the opening below the lower sash allows cooler, fresher air to be drawn in.
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Post time: May-06-2022