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SetpointManager:MultiZone:Heating:Average

asked 2026-03-10 00:01:41 -0500

updated 2026-03-10 08:07:08 -0500

Is the usage of the SetpointManager:MultiZone:Cooling:Average and SetpointManager:MultiZone:Heating:Average discouraged.

I dont see a single example file using these setpointmanagers. I see that ExampleFiles-ObjectsLink.html points to a DualDuctConstVolDamperMultizoneAverageSetPointManager.idf file as using it. But it does not appear to be included in the EnergyPlus-25-2-0/ExampleFiles folder.

Also looking for some clarification on its usage. If I have a constant volume system with a chilled water and Hot water coil, would I include SetpointManager:MultiZone:Heating:Average after the heating coil node and SetpointManager:MultiZone:Cooling:Average right after the cooling coil node to get both heating and cooling control. I created a idf file with these SetpointManagers and I get very high heating unmet hours even though the cooling appears to work fine.

Sample file used (remove jpg extension) C:\fakepath\cv_multizone.idf.jpg

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answered 2026-03-10 07:28:01 -0500

updated 2026-03-10 07:45:47 -0500

No, it's not discouraged. I see that SPM used in "_"DualDuct...... but those "_" example files are not distributed with the release version of energy plus.

C:\fakepath\MultizoneHeatingAverage.png

You can find that file here for a short period of time:

https://fsec.ucf.edu/download/Rich/

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Thanks for sharing the file, I have a few questions.

  1. I ran an annual simulation for chicago with the file. I get very high unmet hours. Perhaps because it is not being autozied?

  2. Usually, which is a preferred setpointmanager for constant volume cooling.SetpointManager:MultiZone:Cooling:Average or setpointmanager:coldest what is the selection criteria?

  3. This is perhaps unrelated but, I see that I am getting high unmet "heating" hours for the constant volume system if I use a DX coil (file attached above) but the unmet hours are gone if I use a CHW coil. why could that be?

kbharathk's avatar kbharathk  ( 2026-03-11 00:37:22 -0500 )edit

Not all example files are set up to control properly. The results you see are likely because the coils are not sized properly. The example files are more intended to show how an object should be set up and may not ideally control zone conditions. I think the average SPM will control the zone temperatures closer to the zone set point temperature,on average. The coldest SPM will control the worst case zone to the set point (higher cooling set point temperature) and all other zones may show higher zone temperatures then when the average SPM is used resulting in more unmet hours.

rraustad's avatar rraustad  ( 2026-03-25 07:40:03 -0500 )edit

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Asked: 2026-03-10 00:01:41 -0500

Seen: 251 times

Last updated: Mar 10