[Bldg-sim] Mass Stretch Code: TEDI calcs

[Maria Karpman]

Option B is indeed the correct answer. The detailed energy modeling
guidelines for the MA Stretch Energy Code are about to be published. Till
they are out, I recommend checking out the version that was posted for the
public comments
<https://www.mass.gov/doc/updated-guidelines-for-tedi-and-ashrae-app-g-modeling/download>.
Note that the modeling rules are quite different from Vancouver & Toronto
versions.

Thanks,

Maria

On Thu, Jul 27, 2023 at 7:07 PM Niknam via Bldg-sim <
bldg-sim at lists.onebuilding.org> wrote:

> Hi,
>
> TEDI should be calculated based on the heating/cooling load of the
> building. You can find that info on SS-D report.
>
> Sent from my iPhone
>
> On Jul 27, 2023, at 6:59 PM, smartin--- via Bldg-sim <
> bldg-sim at lists.onebuilding.org> wrote:
>
> 
>
> Hi Madhav,
>
>
>
> TEDI is a metric for the building envelope and ventilation load
> performance.  You can sum heating (ONLY) coil loads to determine the
> output.  This is a clip from the guideline we use in Canada (BC) that
> explains it.  M.F.Area is building area excluding unconditioned indoor
> parking area, but including all other partially and unconditioned areas. So
> yes, the answer is option B, excluding the cooling.  It is not the peak (A)
> and does not include heating system efficiency (C).
>
>
>
> <image003.png>
>
>
>
> Shaun
>
>
>
> Shaun Martin, BEMP, LEED-BD&C
>
> Principal
>
> Shaun Martin Consulting
>
> smartin at shaunmartinconsulting.com
>
> +1-604-789-1095
>
>
>
>
>
>
>
>
>
> *From:* Bldg-sim <bldg-sim-bounces at lists.onebuilding.org> *On Behalf Of *Madhav
> Munshi via Bldg-sim
> *Sent:* Thursday, July 27, 2023 2:14 PM
> *To:* bldg-sim at lists.onebuilding.org
> *Subject:* [Bldg-sim] Mass Stretch Code: TEDI calcs
>
>
>
> Hi group,
>
>
>
> Hope everyone is doing well. We are working on a school building in MA and
> need to perform “TEDI” models. I’ve read through the documentation and am a
> little confused if it’s a load metric or an energy metric. The limits are
> expressed in kBtu/sf/year in the code language, but some of the supporting
> documentation about how to extract this from equest/IES/ energy plus makes
> me feel like it’s a load metric. It has to be one the three and it seems
> like its option B
>
>
>
>    1. Peak Heating and Cooling load per SF
>    2. Sum of annual heating and cooling loads (annual) per SF – without
>    efficiency accounting
>    3. Sum of annual heating and cooling energy per SF – with efficiency
>    accounting
>
>
>
>
> https://www.mass.gov/doc/updated-guidelines-for-tedi-and-ashrae-app-g-modeling/download
>
>
>
> Appreciate your responses!
>
>
>
> Thank you
>
>
>
> Madhav
>
>
>
> <https://kohlerronan.com/>
> <image004.png> <https://kohlerronan.com/>
>
> *MADHAV MUNSHI* BEMP
>
> Senior Associate
>
> *mmunshi at kohlerronan.com <mmunshi at kohlerronan.com> *
>
>
>
> *KOHLER RONAN* | Consulting Engineers
>
> 171 Madison Avenue, New York, NY 10016
>
> 212.695.2422
>
>
>
> <http://kohlerronan.com/>
> <image011.jpg> <http://kohlerronan.com/>
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>
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>
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-- 


*Maria Karpman *LEED AP, BEMP, CEM

________________

Karpman Consulting

www.karpmanconsulting.net

Phone 860.430.1909
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