Hi,

I am working on a project where the design scheme follows las described below.
There are ERU’s which supplies the fresh air to AHU’s and FCU’s in the project. These AHU’s and FCU’s will take the fresh and will mix with the return air to serve the rooms.
1. With this arrangement do I need to consider MERV 13 filter in all my AHU’s FCU’s and ERU’s to comply with the credit requirement?
2. LEED 2009 BD+C supplemental update says’ Particle filters or air cleaning devices shall be provided to clean the outdoor air at any location prior to its introduction to occupied spaces’ which means installing MERV 13 in the ERU’s which supply the fresh air in to the building alone is sufficient to meet the credit requirement. Am I correct?
3. Considering MERV13 in all the FCU’s is possible? I have not seen any such FCU’s with MERV13 filters.
4. LEED 2009 BD+C supplemental update says’ Clean air filtration media shall be installed in all air systems after completion of construction and prior to occupancy’. Prior to occupancy, if we provide MERV-13 in all the ERU’s and AHU’s and MERV-6 in all the FCU’s. will this comply the credit requirement?
5. In this, project, there are many rooms i.e. retail areas, storage rooms, Janitor rooms etc. which will be considered for the exhaust requirement. If I provide a single exhaust for all these rooms and throw the exhaust air out of the building without mixing with air from any other regularly occupied room’s will I comply with the requirement?
Your response will help me a lot.
Thanks.