Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

How to enter a sizing zone object?

asked 2015-11-07 12:51:57 -0500

amoose's avatar

updated 2017-05-08 15:46:12 -0500

Hello! I am playing around with a simple building model in Open Studio. The simulation ran with no errors until I tried to add an HVAC system. I added a PTHP (Packaged Terminal Heat Pump) system to Thermal Zone 1. Ideal air loads are thus turned off for this zone. The remaining four thermal zones operate with ideal air loads only.

I get the following severe error which causes the simulation to fail:

* Severe * For autosizing of ZoneHVAC:PackagedTerminalHeatPump PTHP, a zone sizing run must be done. * ~~~ * No "Sizing:Zone" objects were entered.

What I have tried, per other thread posts: Under Simulation Settings --> Simulation Control, I have turned on "Do Zone Sizing Calculation", "Do System Sizing Calculation", and "Do Plant Sizing Calculation"

Any idea how I can add a zone sizing object/fix this error?

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted

answered 2015-11-07 15:34:37 -0500

Load in Design Days to your model from a DDY file as describe here. This is used to size the HVAC equipment.

edit flag offensive delete link more


This solved the problem - very simple. Thank you!

amoose's avatar amoose  ( 2015-11-09 20:47:58 -0500 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Training Workshops

Question Tools

1 follower


Asked: 2015-11-07 12:51:57 -0500

Seen: 1,178 times

Last updated: Nov 07 '15