[Bldg-sim] 90.1-2013 vs 2015 IECC Performance Path Compliance

[Jones, Christopher via Bldg-sim]

Elizabeth,
Don’t neglect Section 10 – it also includes mandatory provisions for whole building metering – all fuels. Measurements are to be taken every 60 minutes and reported hourly, daily, monthly, annually. The system shall be capable of storing the data for 36 months.



[cid:image003.png at 01D09C46.E75BA0D0]
Christopher Jones, P.Eng.
Senior Engineer

WSP Canada Inc.
2300 Yonge Street, Suite 2300
Toronto, ON M4P 1E4
T +1 416-644-4226
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C +1 416-697-0056

www.wspgroup.com<http://www.wspgroup.com/>

From: Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Elizabeth Gillmor via Bldg-sim
Sent: Monday, May 02, 2016 1:38 PM
To: Duggin, Cory
Cc: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] 90.1-2013 vs 2015 IECC Performance Path Compliance

I just did a little seminar on this very topic for our Rocky Mountain ASHRAE tech conference last week.  There are a few other key differences in 90.1:

- Mandatory occupancy and daylighting controls in parking garages
- Bi-level occ sensors required in stairwells
- Slightly more stringent cooling efficiency requirements (full load and part load, also slightly lower economizer thresholds). Differences in heat pumps as well I believe.
- More stringent envelope requirements (walls and windows). Also note limits to E/W glazing which may require that you rotate/average the baseline.

Other important items to note:

- A90.1 has MANDATORY electrical submetering requirements (separate monitoring for lighting, receptacles, and HVAC, plus some whole-building requirements) -- this is a biggie. Read section 8-Power thoroughly!
- You CAN take credit for renewable energy (up to 5%)
- A90.1 does not have the same commissioning requirements
- A90.1 allows extra lighting credit for room geometry adjustments and some extra lighting controls (see control factor table), whereas IECC does not


This is not a comprehensive list but those are the big ones that jump out.  Whichever method you choose, make sure you are using the space-by-space method for lighting (it will almost always come out better than whole-building).

Cheers,
Elizabeth


Elizabeth Gillmor  PE, BEMP, LC, LEED AP

e n e r g e t i c s  consulting engineers, llc
energetics-eng.com<http://energetics-eng.com> | 303.619.0091

On Mon, May 2, 2016 at 11:08 AM, Duggin, Cory via Bldg-sim <bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>> wrote:
Does anyone have experience showing code compliance via the performance path in 90.1-2013 vs 2015 IECC?  I have a project that isn’t meeting the 15% threshold against the 2015 IECC standard reference design (per C401.2(3)).  I have always thought the 15% was to level the compliance paths, but the main difference I am finding between the 2015  IECC SRD and 90.1-2013 budget building is the mandatory plug load control requirement.  What am I missing to account for the 15% difference?

Thanks,

Cory Duggin, PE, LEED AP BD+C, BEMP
Principal/Energy Modeling Wizard
TLC Engineering for Architecture
6 Cadillac Drive, Suite 200
Brentwood, TN 37027-5080

direct:

615-346-1939<tel:615-346-1939>

website:

www.tlc-engineers.com<http://www.tlc-engineers.com/>




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