Rating System

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

Rating System Version

v3 - LEED 2009, v3 - LEED 2009, v3 - LEED 2009, v3 - LEED 2009, v3 - LEED 2009, v3 - LEED 2009, v3 - LEED 2009

Inquiry

Our project is a mixed use facility with a combination of a high-rise (21-story) and mid-rise (6-story) residential apartment building. Our project utilizes all electric cooking appliances; there is no gas within the dwelling units. Table 6-4 of ASHRAE 62.1-2007 indicates 100 CFM of intermittent exhaust should be provided for residential kitchens. However, Table 6-4 also indicates that residential kitchen exhaust is Class 2 air, and ASHRAE 62.1-2007 section 5.17.3.2 indicates that Class 2 air can be re-circulated within the space. Please confirm that re-circulating kitchen hoods meet the IEQp1 prerequisite (which requires the 100 CFM of intermittent exhaust). We would also like to know if re-circulating hoods are acceptable for both mechanically ventilated and naturally ventilated apartments, since we may have both in our project. We believe re-circulated hoods should be acceptable to meet the exhaust requirements based on ASHRAE 62.1-2007 section 5.17.3.2, but wanted to confirm since this is a prerequisite.