[esp-r] Re: Is there certain ratio of infiltration & ventilation rate when we have ventailation rate only?

[Achim Geissler]

Dear Mark

generally, you will have an infiltration rate. How large this is  
depends on the air tightness of your building envelope, the  
distribution of leakages and the stack and wind pressure differences  
(these will change all the time).

If you have a balanced ventilation system, you will also typically  
have a pressure differential across the building envelope due to this  
system. If your leakages are large, your ventilation system may even  
not work as expected. The same is true for when your ventilation  
system ducts are not airtight enough.

There are no general rules on how such leakages are distributed and  
how large they are. As a guideline, you can incorporate leakages such  
that the desired air tightness class according to standards is  
achieved. Distribute these leakages according to construction  
probabilities (e.g. windows, joints etc.)

Best regards
Achim


On Sep 14, 2009, at 1:35 PM, 김민환 wrote:

> Hello everyone!
>
> Is there certain ratio of infiltration & ventilation rate when we  
> have ventailation rate?
>
> When we model a building with mechanical ventilation, usually we got  
> ventilation rate data only
> but we are not provided infiltration rate.
>
> In this case is it OK for us to assume that there is no infiltration?
> Is it enough to set ventilation rate from other zone?
>
> Your advice will be appreciated.
>
> Thank you in advance.
>
> Regards
>
> Mark
>
>
> -- 
> Researcher,
> Integrated Simulation Team, DASS consultants Ltd.
>
> 632-9 Guui 1(il)-dong Gwangjin-gu Seoul (143-834 Korea)	
> T. 82.2.913.2585/ F. 82.2.949.2585/ H. www.dasskorea.com
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achim.geissler at intergga.ch




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