Building Performance – Lesson 1.
1. Heat flows from warm to cold.
That’s correct! Heat doesn’t flow up. Hot air goes up but heat travels from warm to cold.
In the winter, heat inside the house wants to travel out. In the summer, heat outside wants to travel in.
This is particularly relevant to wall systems. Walls represent a large surface area of the house that is directly exposed to the elements.
This flow of warm to cold not only affects comfort & energy loss, it also brings moisture and uncontrolled airflow into the walls.
We manage this flow of energy & moisture and by:
1. Air sealing
2. Installing insulation properly
3. Window selection
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