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CI-2009 IEQp1:Minimum IAQ Performance

Single Zone served by 2 HVAC systems

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Nandana Kumar
Deputy General Manager
LEAD Consultancy & Engineering Services
LEEDuser Basic Member
6 thumbs up

Hi, In our project, a particular zone (Board Room) is being served by 2 systems: central chiller plant through an AHU & by Cassette Units. This additional system was introduced due to additional cfm requirement in that particular area. Please do let me know how do we need to zone this system in the VRP calculator and document. Thanks Nandana

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Dylan Connelly
Mechanical Engineer
Integral Group
LEEDuser Expert
342 thumbs up

Wed, 03/05/2014 - 00:19

Yes you need to zone the space in the VRP. Is the AHU's air ducted to the room directly or into the Cassette unit. If the former then just proceed as if the cassette is not there. It is just conditioning the air not changing the ventilation rates.

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