Hi together, I have a question about using the VRP Compliance calculator. Have I only to consider occupied spaces respectively spaces which are intend to be occupied. Or have I to consider all areas which are mechanically ventilated (corridors, sanitary rooms, storage rooms, lift lobby, etc.? And where I have to measure the outdoor air intake flow? On the main inlet on the roof or on other positions like distribution? Thanks in advance for any help.

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Dylan Connelly

Mechanical Engineer

Integral Group

LEEDuser Expert

342 thumbs up

Fri, 05/31/2013 - 21:58

Tajo, Occupied spaces only. So no storage rooms, mechanical rooms, electrical rooms, etc. But you should include lobbies, corridors, etc. You need to measure the outdoor air intake flow at the unit (the main inlet on the roof in you situation). This will give you a % of OA to use for your calculations. You need to know the distribution air flows as well, but if you have old design documents or read the values off the terminal unit that can suffice.

Ramya Shivkumar

Director of Energy & Sustainability

Windward Engineers & Consultants

LEEDuser Basic Member

1 thumbs up

Wed, 07/17/2013 - 18:24

Table 6.1 ASHRAE 62.1 does include outdoor air rate for the area component for storage areas, electrical rooms, and elevator rooms. However further clarification is provided here. http://ashrae.org/File%20Library/docLib/Public/20100203_ic_621200717.pdf

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