A 1,200 ft³ patient-room exercise has 200 cfm total supply, including 40 cfm outdoor air. What are its total and outdoor-air change rates?

Texas ACR A exam practice question · Service

A 1,200 ft³ patient-room exercise has 200 cfm total supply, including 40 cfm outdoor air. What are its total and outdoor-air change rates?

A2 total ACH and 10 outdoor ACH.
10 total ACH and 2 outdoor ACH.
C10 total ACH and 10 outdoor ACH.
D12 total ACH and 2 outdoor ACH.

Where to look it up

https://www.cdc.gov/niosh/ventilation/faq/index.html

Why B is correct

Total ACH = 200 × 60 / 1,200 = 10; outdoor ACH = 40 × 60 / 1,200 = 2. Outdoor air is included in total supply, not added again. These values do not certify a healthcare-room requirement.

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A 1,200 ft³ patient-room exercise has 200 cfm total supply, including 40 cfm outdoor air. What are its total and outdoor-air change rates?

A 1,200 ft³ patient-room exercise has 200 cfm total supply, including 40 cfm outdoor air. What are its total and outdoor-air change rates?

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