[Bldg-sim] Heated Only Residential Zones in 90.1 Appendix G

Jim Dirkes Jim at fsmgmt.co
Mon Jul 22 08:43:15 PDT 2019

Mr. Moltay,
Hoping to get a discussion started.....

I agree that Systems 9 & 10 are inappropriate. I suspect that there is a natural ventilation cooling scheme, since it's unlikely that a multi-family building will have "nothing" for cooling.

If that's true, you do have a cooling system, it's just not a mechanical system. The Baseline system would then be System #1 or #2 and your challenge for the Proposed system will be to demonstrate that it maintains proper control of temperatures and ventilation.

ps, You do not need to maintain typical temperature setpoints for, say an enclosed shopping center. If the owner agrees that 30C is acceptable as a cooling setpoint, then model that.

James V Dirkes II, PE, BEMP, BCxP
Team Lead - Building Performance
616 450 8653
Foresight Management

Coffee Conversation:

If “freedom” is ability to do whatever we want, whenever we want and with whomever… that’s lawlessness or anarchy. Try that with traffic…. then think about what might happen if you try it with your life.

From: Bldg-sim <bldg-sim-bounces at lists.onebuilding.org> on behalf of Omer Moltay via Bldg-sim <bldg-sim at lists.onebuilding.org>
Sent: Monday, July 22, 2019 6:57 AM
To: bldg-sim at lists.onebuilding.org <bldg-sim at lists.onebuilding.org>
Subject: [Bldg-sim] Heated Only Residential Zones in 90.1 Appendix G


This has been bogging us for a while, as we cannot figure out how to interpret the various issues in ASHRAE 90.1.

If in a multifamily building the residential units are only heated but not cooled in the actual design (climate is North Europe), how does the baseline get modeled? I suppose Systems #9 and #10 (Heating Only) would be out of the question as these are intended for ancillary spaces. So it would have to be System #1 or #2, but with cooling as well?

More importantly, would the Proposed residential units be modeled with additional cooling using identical systems as in Baseline?

Thank you in advance,

Mimta EcoYapi, LEED Proven Provider
Hekimsuyu Cad. 559. Sk.
No:39 34255 Kucukkoy Istanbul Turkey
Tel: 90-212-617-2296
Fax: 90-212-617-2297
Mobile: 90-533-957-1394

[cid:part3.63B814F2.93303A19 at mimtarch.com]

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20190722/ec109936/attachment-0002.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: igboadldlbndjgnk.png
Type: image/png
Size: 44049 bytes
Desc: igboadldlbndjgnk.png
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20190722/ec109936/attachment-0002.png>

More information about the Bldg-sim mailing list