How Single‑Hung and Double‑Hung Windows Energy Efficiency Stacks Up
Double‑hung windows are more flexible — both sashes open, which allows for better airflow. This can be particularly advantageous in warm climates or during seasons when ventilation helps cool the home naturally. Opening the bottom sash lets cool air in, while opening the top sash allows hot air to escape — a useful passive ventilation strategy. https://marketingbiznews.com/h....ow-single-hung-and-d
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