Rating System

LEED BD+C: New Construction, LEED ID+C: Commercial Interiors, LEED BD+C: Core and Shell

Rating System Version

v3 - LEED 2009, v2 - LEED 2.2, v2 - LEED 2.0

Inquiry

Residential projects without directly ducted makeup air typically get makeup air either from operable windows alone, from operable windows plus pressurized corridors, or from either or both of those sources, plus negative pressure created by bathroom fans and kitchen exhaust hoods (which may or may not be always on). For LEED NC 2.1 projects, it was asked whether CO2 monitors must be provided for low density residences. In the CIR ruling from 9/20/2004, it was confirmed that CO2 monitors for these residential spaces are not necessary to meet the intent of the credit. For LEED NC 2.2 projects, does this ruling from 9/20/2004 apply? Do residential units without ducted makeup air now require CO2 monitoring? If the ruling varies depending on the strategy by which the units receive makeup air (operable windows, pressurized corridors, bathroom and kitchen fans alone or in combination), can you indicate which scenarios require CO2 monitoring and which do not?