delayed walls warning

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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

Ryan Lacey's picture
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Joined: 2011-09-30
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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

Eric O'Neill's picture
Joined: 2011-09-30
Reputation: 0