Rating System

LEED BD+C: New Construction, LEED BD+C: Core and Shell, LEED BD+C: Schools, LEED ID+C: Commercial Interiors, LEED O+M: Existing Buildings

Rating System Version

v3 - LEED 2008, v2 - Schools 2007, v2 - LEED 2.2, v2 - LEED 2.0

Inquiry

The project intends to meet the permanent entryway system and exhaust system requirements of the credit criteria. The project is requesting an interpretation of the acceptability of the method proposed to meet the MERV 13 filtration requirement. The project HVAC system is a dual path HVAC system: Outside air for ventilation is provided by 100% fresh air air-handlers with heat recovery from exhaust air. These air handlers will be equipped with MERV 13 filtration or better as well as other features for achieving high efficiency. Zone conditioning will be provided by fan coils receiving a mixture of return air from the space and fresh air from the air handlers described above. In this respect, the fan coils provide a similar function to that of fan powered terminal units on a conventional variable air volume system and similar to that system, MERV 13 filtration is not possible on the zone fan coil level. The design team believes that the design meets the intent of the credit for filtration since all outside air introduced into the building will be filtered to the high standard of MERV 13.