The tenant\'s fitout design complies with most of the requirements of EA P2 however due to local design standards and the clients operational process requirements there are 2 clauses that we are not able to achieve and as such will require a waiver for : ASHRAE 90-1 2004 Clause 6.5.4 Hydronic System Design and Control As part of the Client\'s global network the fitout for the above project includes a data centre/ main communications room (MCR). The cooling load associated with the MCR is served by a number of chilled water units connected to 2no tenant packaged air cooled chiller. Due to the constant nature of the process load associated with the MCR room it is not proposed to install Variable speed drives to the pumps. The heat load associated with the servers contained within the MCR room is maintained at close to 100% due to the international nature of the network that the system serves and as such it is operated 24/7. The introduction of Variable Speed pumping to this system (as required to comply with ASHRAE 90.1 -2004 clause (6.5.4.1 Hydronic Variable Flow Systems) would therefore not achieve any energy saving and as such is not proposed to be installed. The client is willing to install them if necessary however does not understand how the procurement, manufacture, installation and maintenance issues associated with the additional equipment increases the sustainability of the project, given the very limited scope for VSDs to reduce energy use. Furthermore the additional complexity of Variable Speed Drives within such a critical process system adds further risk to the client business. ASHRAE 90.1-2004 allows exemption to clause 6.5.4.1 where a reduced "flow is less than the minimum flow required by the equipment manufacturer for the proper operation of the equipment served by the system" we believe that we qualify for this exemption as the client\'s critical system would be affected by any reduction in chilled water flow. As such it is proposed to install the pumps as a constant volume system albeit fitted with high efficiency motors which when combined with high efficiency air cooled chillers which exceed the minimum set out in ASHRAE 90.1-2004 (table 6.8.1C) produce an energy efficient solution which does not compromise the clients operational requirements. Further to this the application of temperature reset on the chilled water system (clause 6.5.4.3) would also be detrimental to the clients critical systems as such we believe that the system is exempt under the relevant exemption clause within the standard. ASHRAE 90-1 2004 Clause 8.4.1 Voltage Drop The local design standards require the voltage drop across the system to be sized as a maximum of 4% with 3.5% being from the feeder conductors and 0.5% from the branch circuits. The ASHRAE standard calls for a maximum voltage drop at design of 5% with 2% being from the feeder conductors and 3% from the branch circuits. As such the local design standard calls for a smaller voltage drop across the system, relative to the ASHRAE standard, but with a different split between sections. The project is therefore looking for a credit interpretation regarding this issue on the basis of the local design standards being lower on a total system basis, albeit with a different percentage split across the system.