Rating System

LEED BD+C: New Construction, LEED ID+C: Commercial Interiors, LEED BD+C: Schools

Rating System Version

v2 - Schools 2007, v2 - LEED 2.2, v2 - LEED 2.0

Inquiry

This CIR is submitted in relation to the implementation of LEED NC 2.2 Credit EQ 3.2 as it relates to a Data Center facility. Based upon our review of the existing CIRs there does appear to be a related CIR raised under the NC 2.1 program dated 1/18/2007, however it is not clear as to whether this ruling is applicable to NC 2.2. This previous NC2.1 CIR ruled that when applying the 14,000 ft3 / ft2 alternate approach (which is in effect the NC 2.2 credit criteria), that In order to achieve EQ credit 3.2, all "Occupied spaces" as defined in ASHRAE 62.1-2004 must be adequately flushed out. Spaces not classified as "Occupied spaces" under ASHRAE 62.1-2004 are not covered by this credit. Further research has found that the ASHRAE 62.1:2004 definition of an "Occupied Space" is "An enclosed space intended for human activities, excluding those spaces intended primarily for other purposes, such as storage rooms and equipment rooms, that are only occupied occasionally and for short periods of time" Based upon the above information, we are seeking confirmation that the following areas within a datacenter facility are not classed as "occupied space" per the AHSRAE 62.1:2004 definition - due to their occasional and short occupancy periods - and as such are not covered by this credit and consequently can be omitted from the 14,000 cfm / sq ft flush out calculation. o Server Rooms o UPS / Battery Rooms o Mechanical Rooms o Electrical Rooms To achieve credit EQ3.2 we therefore propose to undertake a flush out of all offices, circulation space and other areas that fall under the ASHRAE 62.1:2004 definition of an "Occupied Space", based upon our assumption stated above. Please confirm that this strategy for achieving credit EQ3.2 is acceptable.