[Equest-users] Two heating systems in 1 zone.

Nicholas Caton via Equest-users equest-users at lists.onebuilding.org
Fri Apr 28 15:29:02 PDT 2017

Agreed - baseboards are my first choice for handling "oh and there's also a space heater you forgot about" and similarly simple scenarios, when that's a feasible option.

In some instances, zonal reheat can also play a role in approximating a second system, where baseboards are unavailable or otherwise in use.  Caution however to consider the implications on the "terminal box" (even if it's virtual/imaginary) capacity to deliver needed heating/cooling at all hours.

There's also always the option to turn your single zone into two.  It's typically not as simple post-wizards (experiences like this build foresight to draw up your zone maps to avoid the issue - we're always learning!), but is definitely do-able!  You can thermally connect the two zones with an air wall to ensure ready heat transfer.  Be mindful this practice can demand extra inputs (relying less on auto-sizing) to ensure adequate capacity/airflow are provided to each "sub-zone."

Also stepping back a bit for perspective - this might be a worthwhile exercise: consider whether 2 similar systems can be effectively "combined" into one for the simulation (perhaps of a 3rd type).  Conceptualizing, executing, and verifying behavior for the marriage of distinct real-world systems is often a mental-hurdle the first few times, but can become a very useful sub-skillset in your energy analysis toolbox for tackling very complex situations.


[cid:image001.png at 01D2C034.7F49EFB0]
Nick Caton, P.E., BEMP
  Senior Energy Engineer
  Regional Energy Engineering Manager
  Energy and Sustainability Services
  Schneider Electric

D  913.564.6361
M  785.410.3317
F  913.564.6380
E  nicholas.caton at schneider-electric.com<mailto:nicholas.caton at schneider-electric.com>

15200 Santa Fe Trail Drive
Suite 204
Lenexa, KS 66219
United States

[cid:image002.png at 01D2C034.7F49EFB0]

From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of David Eldridge via Equest-users
Sent: Friday, April 28, 2017 2:55 PM
To: Tim Burke <tburke at tei-engineering.com>; equest-users at onebuilding.org
Subject: Re: [Equest-users] Two heating systems in 1 zone.

You can have baseboard heat plus an airside system. Only one air system can serve a zone.


David S. Eldridge, Jr., P.E., LEED AP BD+C, BEMP, BEAP, HBDP
Grumman/Butkus Associates

From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Tim Burke via Equest-users
Sent: Friday, April 28, 2017 1:39 PM
To: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>; equest-users at onebuilding.org<mailto:equest-users at onebuilding.org>
Subject: [Equest-users] Two heating systems in 1 zone.

Is there a way to put two heating systems in 1 zone?

Tim Burke

T.E., Inc.
830 North Riverside Drive #200
Renton, WA. 98057
(425) 970-3753 Phone
(425) 970-3756 Fax
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