[Equest-users] unmet heating load hours

Sharad Kumar via Equest-users equest-users at lists.onebuilding.org
Sat Apr 29 04:27:29 PDT 2017

Hi Javed,

It can be that you are right but i know lesser about energy plus.
I think that this part is of some software manual which wants to describe
that if the load are unable to match up-to the extent that the unmet load
hours are not limited by the maximum capacity then you are supposed to use
other means to meet down the throttling hour or UMLH (unmet load hours).

As per this guideline one is required to have throttling range upto 2
degree Fahrenheit.

As per me this is regarding energy plus software.


On Sat, Apr 29, 2017 at 3:34 PM, Javed Iqbal <eee.javed at gmail.com> wrote:
8 degF (4.44 degC) looks too high to me. The following standard holds true
for all irrespective of tool used (Eplus, eQuest. IES VE etc.), in my

[image: Inline image 2]
source: 90.1-2010  Performance Rating Manual

On Sat, Apr 29, 2017 at 10:04 AM, Sharad Kumar via Equest-users <
equest-users at lists.onebuilding.org> wrote:

Hi Tim,

For LEED projects the unmet load hour can go up-to 300 hours for the
Baseline Case and the unmet hours in the proposed case shall not exceed the
unmet hours in the base case by more than 50 hours.

However in order to remove unmet load hour you can tweak with the heating
set-points to higher limits, changing the control zone to more larger
spaces, might be increasing the throttling range to 8 degree Fahrenheit and
so on.

May be this can help.



---------- Forwarded message ----------

From: Tim Burke via Equest-users <equest-users at lists.onebuilding.org>
To: "equest-users at onebuilding.org" <equest-users at onebuilding.org>
Date: Thu, 27 Apr 2017 21:50:15 +0000
Subject: [Equest-users] unmet heating load hours

I have a Costco warehouse equest model with 4 unmet heating load hours in
my proposed model with zero in my baseline budget model.  I need to be able
to tweak my model to get rid of these unmet load hours but minor tweaks
don’t seem to make a difference.  Could there be something wrong with the
model that results in having a few unmet load hours that are hard to get
rid of?

Tim Burke

T.E., Inc.

830 North Riverside Drive #200

Renton, WA. 98057

(425) 970-3753 <(425)%20970-3753> Phone

(425) 970-3756 <(425)%20970-3756> Fax

WWW.TEI-ENGINEERING.COM <http://www.tei-engineering.com/>

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Javed Iqbal, LEED AP, CEA
Sr. Energy Analyst
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