Residential HVAC Installation Practice Exam

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Prepare for the Residential HVAC Installation Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

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How does adjusting the ACH value affect the cfm calculation in an HVAC system?

Increases the energy efficiency of the system
Decreases the cfm value
Increases the cfm value
No impact on the cfm calculation

The correct answer is: Increases the cfm value

Adjusting the ACH (air changes per hour) value directly affects the cfm (cubic feet per minute) calculation in an HVAC system. Increasing the ACH value will result in increased airflow, which in turn increases the cfm value. This means that more air will be circulated through the system within a minute, affecting the overall performance and efficiency of the HVAC system. Therefore, the correct answer is that adjusting the ACH value increases the cfm value. The other options are incorrect as they do not accurately reflect the relationship between ACH and cfm in an HVAC system.