[Equest-users] Pkg VAV - General Question - Ventilation

[Robin Thornton via Equest-users]

Michael,

If you are referring to the CFMs in the SV-A report being 5 % higher than what you input, check the Altitude Factor in the same report. Your inputs into eQuest are in standard CFM (i.e. at sea level), while the reports are in site CFM (i.e. at site altitude). So if your altitude factor is > 1.0, the reported airflows will be higher than your inputs. You can check by selecting an alternative location at sea level.

Regards,
Robin

Robin Thornton, CMVP, CEM, LEED AP BD+C
Associate
CEL GRUEN, Sustainability Group
Crossey Engineering Ltd.
FUTURE FOCUSED | INNOVATIVE | ADAPTIVE
2255 Sheppard Avenue East Suite E-331
Toronto, Ontario, M2J 4Y1
office: 416.497.3111 ext. 659
email: robin.thornton at cel.ca<mailto:robin.thornton at cel.ca>      web: www.celgruen.ca<http://www.celgruen.ca/>

From: Mike Schaefer via Equest-users [mailto:equest-users at lists.onebuilding.org]
Sent: January 28, 2017 5:18 PM
To: Annie Marston via Equest-users
Subject: [Equest-users] Pkg VAV - General Question - Ventilation


I'm modeling a Pkgd Var Vol rooftop unit with VAV boxes in eQUEST version 3.65 and I have a ventilation issue. The issue is this...



Although I enter an Air Flow rate in cfm for each VAV box, the program insists on increasing my cfm by 1.05% when I run a simulation. I can't seem to force the program to model the ventilation cfm that I've entered. How can I stop eQUEST for increasing by hardwired ventilation cfm? What factors do I need to modify to run a simulation with the ventilation quantities for my scheduled cfm?



thanks,



Michael Schaefer - P.E.*, LEED AP

Licensed in Kansas, Missouri, and Colorado
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