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The description below is for an image or graphic that appears in the page: The Devon Retrofit Guide

Image description

Diagram showing the heat loss from a window. The window gets heat gains from the sun, shown as a dotted red arrow going into the window. Heat is lost through: Draughts from the window opening and around the frame (shown as a dotted blue arrow pointing away from the window), heat loss through the frames, and heat loss through the glass (both solid blue arrows pointing away from the window.

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