[Equest-users] Unmet hours in residential building

[Julien Marrec]

Michael,

First, you're under 300 hours so indeed it's a minor problem.

I've only looked at your model very briefly but:

   - HW loop operation is set to "SNAP" at OA of 60°F. This is causing some
   minor underheating in shoulder season.


   - You have local exhaust fan with makeup = infiltration. Basically
   equest ignores this added infiltration during the sizing, so you have to
   trick it to take it into account by having a different schedule for sizing
   (heating AND cooling design days). I've put together my findings on the
   subject on Unmet Hours here
   <https://unmethours.com/question/3102/how-do-you-model-exhaust-fans-in-equest/>
   in some kind of tutorial that I hope is helpful.


Do the above and your unmet hours disappear.


Additionally:

   - Throttle range of 0.3°R seems pretty aggressive to me.
   - when you use baseboards and want to oversize, use the system's sizing
   ratio


Hope this helps,
Julien


--
Julien Marrec, EBCP, BPI MFBA
Energy&Sustainability Engineer
T: +33 6 95 14 42 13

LinkedIn (en) : www.linkedin.com/in/julienmarrec
LinkedIn (fr) : www.linkedin.com/in/julienmarrec/fr
<http://www.linkedin.com/in/julienmarrec>

2015-10-15 16:30 GMT+02:00 Michael Campbell <mcamp1206 at gmail.com>:

> I mistakenly attached the PRD file instead of PD2.  Correct files are
> attached.
>
> On Thu, Oct 15, 2015 at 10:16 AM, Michael Campbell <mcamp1206 at gmail.com>
> wrote:
>
>> Hello,
>>
>> I'm having what appears to be a minor issue with unmet hours in a model
>> that I've inherited.  My INP and PD2 files are attached.  I've tried
>> adjusting the cool sizing ratio and and adjusted infiltration rates and
>> equipment loads with no real effects.  Anybody have any ideas?
>>
>> Thanks,
>> Mike Campbell
>>
>
>
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