Re: [EnergyPlus_Support] about the outside air

["Michael J. Witte" <mjwitte@xxxxxxxx>]

INFILTRATION is uncontrolled flow of outside air through cracks or other 
openings in the building envelope.  It becomes a load on the space.

Outside air flow in the ZONE SIZING is fresh air brought in by the HVAC system 
(mechanical ventilation) and is in addition to infiltration.  

Some modelers assume that the HVAC system will pressurize the building such 
that infiltration goes to zero when the system fans are operating, but this is 
subject to debate.  This can be done through schedules if desired.

Mike


On 18 Jun 2005, at 10:00, beyangj wrote:

> Dear,
> I wonder what's the relationship between the Design Volume Flow Rate in 
> subject INFILTRATION and the outside air flow in sbject ZONE SIZING.The 
> outside air flow in sbject ZONE SIZING include the infiltration rate? 
> Could you tell me the difference between them?
> 
> Best,
> 
> Stewart
> 
> 
> 
> 
> 
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> 



========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx




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