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NC-2009 IEQp1:Minimum IAQ Performance

IEQ p.1

Hi everyone! We have an apartment building with the valve air infiltration in studio, and also we have a mechanical bathroom and kitchen exhaust. Can anyone please, clarify, how do we need to classify our project? Is this Natural ventilation, or a mechanical ventilation, or do we need to choose both options?

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Mon, 01/20/2014 - 14:48

Please elaborate on the valve infiltration method. Can you provide a link for the product you plan to use?

Tue, 01/21/2014 - 07:35

So, this is the link for the product: http://www.flaktwoods.com/9fc438d3-d7ba-412e-9907-8543bd2b3fe4 These valves we set into the wall near the window for fresh air.

Tue, 01/21/2014 - 15:26

It looks like your design is based on a pressure differential from outside to inside. I think you would need to use the alternative compliance path to demonstrate how you are inducing the ventilation air since this is not technically a mechanical ventilation design and it also would not meet the free area requirement of natural ventilation.

Wed, 01/22/2014 - 06:58

Thank you for your response. To clarify, I will start from the beginning. So, we have: 1) A mechanical bathroom and kitchen exhaust. (fan-assisted) 2) A compensation exhaust air through valves infiltration (in studio). 3) We also have an openable windows (in studio), which meet ASRAE 62.1-2007 paragraph 5.1 How to classify our project?

Wed, 01/22/2014 - 13:31

If the window covers the studio under 5.1 completely then do natural ventilation for the studio. If the kitchen is part of that space then you would have no other mechanical ventilation. If the kitchen is separate and the exhaust is all you are using then do mechanical with an Ev of 0.5.

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