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CS-2009 IEQp1:Minimum IAQ Performance

Ventilation type

We are working on an office building for LEED CS. Packaged terminal AC are used to supply hot/cold air for office spaces to meet cooling/heating demand, but no outdoor air is supplied mechanically. Fresh air is supposed to be provided through window openings, and exhaust air also releases naturally. Can this type of ventilation system be defined as natural ventilation, or mixed-mode ventilation, when we want to achieve IEQp1?

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Tristan Roberts
Representative
Vermont House of Representatives
LEEDuser Expert
7780 thumbs up

Fri, 03/22/2013 - 13:03

Lolita, it sounds like it is mixed-mode.I'm concerned that the ventilation is under-designed (will windows be open year-round, 24/7, for example to provide outdoor air exchange?), so I'd be careful to make sure it complies with ASHRAE 62.

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