[Equest-users] Sizing of equipment

Carol Gardner gems at spiritone.com
Tue Jan 13 08:41:48 PST 2009

Also, make sure the throttling range is 4-6 not whatever it defaults 
too. There is a writeup in online help talking about why you should do so.


Sam Mason wrote:
> Janne,
> Without information on HW loop temp, cooling system type and control, 
> and heating control, it’s tough to figure out what is going on with 
> your model. That being said, I will provide what help I can. The 
> sizing ratios on the coils only increase the coil size and do not 
> increase airflow which is generally why zones will have hours out of 
> range. Check the minimum flow ratio and airflow to your zones and make 
> sure they are appropriate for the loads in the space. With regards to 
> your system setup, make sure your reheat setpoints and supply air 
> setpoints are consistent.
> For future reference, if you provide the input file, myself or others 
> on the list serve will be able to better respond to future questions.
> Sam
> --
> Sam Mason
> Atelier Ten
> sam.mason at atelierten.com
> *From:* equest-users-bounces at lists.onebuilding.org 
> [mailto:equest-users-bounces at lists.onebuilding.org] *On Behalf Of 
> *Kairento, Janne
> *Sent:* Tuesday, January 13, 2009 11:03 AM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] Sizing of equipment
> Hey All,
> I am running a load with many zones on 5 floors totaling over 300 
> zones. There are some zones with many unmet hours, some of the core, 
> some perimeter. I went in and changed the sizing ratio of these zone 
> to reduce the unmet heating hours. I am modeling this building with 9 
> AHU’s, all VAV w/ reheat. Does anyone have any insight or suggestions 
> on why or how these unmet hrs. exist. I have changed the hot water 
> loop flow GPM but it had no effect on the unmet heating hrs. so I 
> deduced this is not the cause.
> *Janne Kairento, E.I.T., LEED AP*
> */Cosentini Associates/*
> One Broadway
> Cambridge, MA 02142
> Phone: 617.494.9090
> Fax: 617.494.9292
> *Please consider the environment before printing this e-mail*
> NOTICE OF CONFIDENTIALITY This E-mail message and its attachments (if 
> any) are intended solely for the use of the addressees hereof. In 
> addition, this message and the attachments (if any) may contain 
> information that is confidential, privileged and exempt from 
> disclosure under applicable law. If you are not the intended recipient 
> of this message, you are prohibited from reading, disclosing, 
> reproducing, distributing, disseminating or otherwise using this 
> transmission. Delivery of this message to any person other than the 
> intended recipient is not intended to waive any right or privilege. If 
> you have received this message in error, please promptly notify the 
> sender by reply E-mail and immediately delete this message from your 
> system.
> ________________________________________________________________________
> This e-mail has been scanned for all viruses by Star. The
> service is powered by MessageLabs. For more information on a proactive
> anti-virus service working around the clock, around the globe, visit:
> http://www.star.net.uk
> ________________________________________________________________________
> ______________________________________________________________________
> This email has been scanned by the MessageLabs Email Security System.
> For more information please visit http://www.messagelabs.com/email
> ______________________________________________________________________
> ------------------------------------------------------------------------
> _______________________________________________
> Equest-users mailing list
> http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org
> To unsubscribe from this mailing list send  a blank message to EQUEST-USERS-UNSUBSCRIBE at ONEBUILDING.ORG
> ------------------------------------------------------------------------
> No virus found in this incoming message.
> Checked by AVG - http://www.avg.com 
> Version: 8.0.176 / Virus Database: 270.10.6/1891 - Release Date: 1/13/2009 8:17 AM

More information about the Equest-users mailing list