Refrigeration & Air Conditioning Mechanic Red Seal · Question
In a commercial building, a ventilation system is designed to provide 0.6 air changes per hour (ACH) of fresh air. If the conditioned space has a volume of 1200 cubic metres (42,377 cubic feet), what is the required fresh air supply rate in cubic metres per hour (m³/h)?
To calculate the required fresh air supply rate, multiply the room volume by the desired air changes per hour: 1200 m³ * 0.6 ACH = 720 m³/h.
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Question: In a commercial building, a ventilation system is designed to provide 0.6 air changes per hour (ACH) of fresh air. If the conditioned space has a volume of 1200 cubic metres (42,377 cubic feet), what is the required fresh air supply rate in cubic metres per hour (m³/h)?
Answer options:
- 72 m³/h
- 200 m³/h ✅ 720 m³/h
- 2000 m³/h
Correct answer: 720 m³/h
Explanation: To calculate the required fresh air supply rate, multiply the room volume by the desired air changes per hour: 1200 m³ * 0.6 ACH = 720 m³/h.
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