The relationship Vpz-min = 1.5 Voz defines a minimum zone supply. If Voz is 100 cfm, what is Vpz-min?

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Prepare for the ASHRAE 62.1 Standards test with flashcards and multiple choice questions. Each question offers hints and explanations. Get ready for excellence!

Multiple Choice

The relationship Vpz-min = 1.5 Voz defines a minimum zone supply. If Voz is 100 cfm, what is Vpz-min?

Explanation:
The main idea is a simple multiplier: the minimum zone supply is 1.5 times the outdoor air flow. With Voz = 100 cfm, Vpz-min = 1.5 × 100 = 150 cfm. This ensures the zone receives enough fresh air to maintain proper dilution and mixing despite distribution losses. The other numbers don’t fit the 1.5 multiplier (they would be 100, 200, or 125 cfm), so 150 cfm is the correct minimum zone supply.

The main idea is a simple multiplier: the minimum zone supply is 1.5 times the outdoor air flow. With Voz = 100 cfm, Vpz-min = 1.5 × 100 = 150 cfm. This ensures the zone receives enough fresh air to maintain proper dilution and mixing despite distribution losses. The other numbers don’t fit the 1.5 multiplier (they would be 100, 200, or 125 cfm), so 150 cfm is the correct minimum zone supply.

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