[Equest-users] delayed walls warning

Eric O'Neill elo at MichaelsEngineering.com
Tue Jan 27 07:40:45 PST 2009


Ryan,

 

If the space is a ground floor, then change the floor construction type
from "U-Value" to "layers" and similarly for the top floor and its roof
construction. This error is essentially telling you that you have
certain constructions that won't have any time factor included in the
calculations. To get somewhat technical, consider two walls with equal
R-values, but different constructions - 1) concrete 2)steel stud walls.
A heat flux on the outside of the wall at time zero will be felt rather
rapidly on the inside in case 2, but in case 1 it will be absorbed by
the wall and introduced into the space over a delayed period of time
(depending on the construction, that delay can be over a day). 

 

You didn't do anything to yield it, sometimes that's just what the
wizard produces.

 

Eric 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Ryan
Lacey
Sent: Tuesday, January 27, 2009 7:47 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] delayed walls warning

 

Hello,

 

I am not sure what I did to yield these warnings:

 

SPACE 125 Office has 4 delayed walls, 0 delayed floors and 0 delayed
ceilings. There should be at least a delayed wall and floor, a delayed
wall and ceiling, or a delayed ceiling and floor for custom weighting
factors to be calculated. ASHRAE weighting factors with floor weight of
70 lb/ft2 (342 kg/m2) will be used for this space. (lLineNum = 1000000)

 

The warnings show up when the file loads.  Does anybody have any
experience in correcting these errors?

 

Thanks,

 

Ryan Lacey

LEED AP

Petersen Engineering, Inc.

PO Box 4774

6 Market Square

Portsmouth, NH 03801

Phone 603.436.4233 x113

Fax 603.436.4294

www.petersenengineering.com

ryan at petersenengineering.com

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20090127/4404cc96/attachment-0002.htm>


More information about the Equest-users mailing list