[Bldg-sim] 90.1 and infiltration/air-tightness?

[Nick Doylend]

Hi, I'm wondering if 90.1 makes any stipulations regarding building air
infiltration, for example can there be a difference between proposed
design and energy budget building?  I can't seem to find any reference
to facade air tightness but the standard is a pretty dense document to
wade though.  Is there a more easily digested summary available
anywhere?

Thanks,

Nick