100% Outside Air systems

Christie Rimes

LEEDuser Basic Member

0 thumbs up

Project location :

Australia

September 2, 2015

The base building HVAC system uses 100% outside air. Therefore there are no return grilles. I am assuming that the requirement for filtration then is not applicable?

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Michelle Halle Stern

Principal

UpFront Regenerative Design

LEEDuser Premium Member

99 thumbs up

Wed, 09/09/2015 - 15:07

If there is not a way for contaminants to get back into the ventilation system, you would meet the intent, and I would assume you are right. However, I'd prefer that mechanical engineer answer this question.

Dylan Connelly

Mechanical Engineer

Integral Group

LEEDuser Expert

342 thumbs up

Thu, 09/10/2015 - 23:37

Thanks Michelle That's correct for this credit - but you'll also need to meet the ASHRAE standard minimum of MERV 6 before a cooling coil (if applicable). IEQp1 requires that you meet ASHRAE standards. I'd recommend MERV 8 anyway - they are practically as cheap and similar pressure drop.