LEED AP with Operations and Maintenance (O+M ) Practice Exam

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What is the minimum efficiency reporting value (MERV) required for filters in mechanical ventilation systems under EQ Credit: Enhanced Indoor Air Quality Strategies?

MERV of 10
MERV of 12
MERV of 13 or higher
MERV of 15

The correct answer is: MERV of 13 or higher

The correct answer is a MERV of 13 or higher, which is specified to ensure that mechanical ventilation systems effectively filter out particulate matter from the indoor air, thus improving indoor air quality. A MERV rating (Minimum Efficiency Reporting Value) indicates the efficiency of air filters and their ability to capture particles of various sizes, with higher MERV ratings signifying better filtration capabilities. Choosing a MERV of 13 or higher aligns with LEED's goals for enhancing indoor air quality as it ensures significant removal of airborne particles, such as dust, pollen, and mold spores, thereby contributing to healthier indoor environments for occupants. This threshold helps mitigate potential health risks associated with poor air quality and supports overall occupant comfort and well-being. Lower MERV ratings, such as 10 or 12, do not provide the same level of filtration efficiency and may allow more pollutants to circulate within the indoor environment, which is contrary to the objective of promoting enhanced indoor air quality.