Hi, does anyone know if the v2009 interpretation still applies that the first 3 ft of the 10 ft must be a permanent system (like recessed mat system) and the remainder can be roll-up mats

Hello all,

Is the recirculated air delivered by a Fan Powered Terminal Unit required to be filtered by a MERV-13 filter at the Fan Powered Terminal Unit?

Does the 10'-0" entrway requirement only apply to the main entry or all entries to the building?

Hello,

Hi All

I recall an LI or Addendum from v2009 whereby certain smaller units were exempt from MERV 13 filtration as it is just not feasible on those units, am I remembering correctly?

Dear All,

Hi,

We are doing an office building.

I am working on a Fire Station Project.  We are going for the EQ Credit: Enhanced Indoor Air Quality Strategies Option 1.  We are mechanically ventilated in both the Fire Station living s