[Equest-users] OA schedule

[Patrick J. O'Leary, Jr.]

depends on the modeling requirements.  90.1?  owner requirement?  leed?  
something else?

for 90.1-2007, appendix g, table 3.1, no. 4 schedules, specifically 
states the "hvac fans that provide outdoor air for ventilation shall run 
continuously whenever spaces are occupied and shall be cycled on and off 
to meet heating and cooling loads during unoccupied hours."  90.1-2004 
doesn't specify fans specifically for outdoor air for ventilation, it 
just says hvac fans - which is the same as the system supply fan in a 
non-doas/economizer capable of completely closing the outdoor air damper 
system so the outdoor air can't be shut off.

so for a 90.1-2007 simulation the minimum oa should not be zero during 
unoccupied hours.

On 4/27/12 9:44 AM, sambhav tiwari wrote:
> Hi All,
>            It is necessary to specify the min OA schedule as -999 for
> occupied and 0 for unoccupied hrs at either system or zone level or it
> can be skipped.
>
>
> Thanks
> Sambhav
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