[Equest-users] Ventilation

[Nicholas Caton]

Capture

Hi Farid,



Might be easiest to just finish the wizards, then in detailed mode:

1.       Set a user default for (zonal) OA-CHANGES = 16

2.       Strip all wizard-generated inputs for OA-FLOW/PER

3.       If you want CFM to lock up to an exact figure, apply a correction
factor to the user default (this would account for variances in modeled
geometries from actual design).



Just a hunch… I’d try with a separate copy of your project first to test ;).



Your wizard-borne formula/approach looks okay on paper… Consider the
corresponding occupant densities below result in 800+ people, not 100.
Also consider your fractional occupancy schedule is in play, which may not
have an hour at 100% occupancy (thus drawing the ventilation rate
corresponding with full occupancy), without intervention.



~Nick





*NICK CATON, P.E.*
*Owner*



*Caton Energy Consulting*
  1150 N. 192nd St., #4-202

  Shoreline, WA 98133
  office:  785.410.3317

www.catonenergy.com



*From:* Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] *On
Behalf Of *Farid Pour
*Sent:* Thursday, January 29, 2015 12:52 PM
*To:* equest-users at lists.onebuilding.org
*Subject:* [Equest-users] Ventilation



Hi

I am trying to model an existing Lab buildng with 16ACH actual ventilation
rate. the height of the floor to ceiling is 15ft, the area is 35556 SF and
about 100 people are working in the building.



How can I calculate CFM per person. The numbers I am getting is really high
and is not even close to ahrae 62.1



Here is what I did for calculation



CFM/person = 16 (ach) x 35556 SF x 15ft / 60 / 100person
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