The mechanical engineer for a campus laboratory building with 100% OA
wants to claim energy savings for reduced exhaust from more efficient
fume hoods. (Established design practice uses hoods with 100 fpm flow -
they are installing 70 fpm hoods. This reduces peak exhaust from 700 to
490 CFM per hood.) My approach has always been to keep outside air,
exhaust and infiltration flows identical between the proposed and
baseline models (except for DCV). (This was not easy for this model with
proposed VAV and baseline constant volume packaged rooftops.)

Has anybody successfully claimed OA/exhaust/infiltration savings for a
LEED project?

Thanks,

William Bishop, EIT, LEED(r) AP