Three degree ventilation rule

Question

Accepted Answer

The three degree ventilation rule is a guideline for adjusting ventilation rates in buildings based on outdoor temperature changes.

The rule suggests that for every 3-degree Fahrenheit change in outdoor temperature, the ventilation rate should be adjusted by 20%.
This helps maintain indoor air quality and energy efficiency.
For example, if the outdoor temperature drops from 60°F to 50°F, the ventilation rate should be decreased by 20% to prevent over-ventilation and energy waste.
Conversely, if the outdoor temperature increases from 70°F to 80°F, the ventilation rate should be increased by 20% to maintain indoor air quality.