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

Is it possible to meter different "Fan" annual electricity consumptions separately in OS?

asked 2015-07-09 04:59:52 -0500

Daniel Mak's avatar

updated 2015-07-11 16:56:48 -0500

Dear all,

As a requirement in the LEED submission, I need to report the exhaust fan energy consumption for the car park separately.

It seems that there is only one item in the "Energy Meters" section of the OpenStudio report which is "Fan:Electricity". Is there a way to break this down into different fans so I can extract the information for a particular fan only?

Regards, Daniel

edit retag flag offensive close merge delete

2 Answers

Sort by » oldest newest most voted

answered 2015-07-09 08:37:04 -0500

updated 2015-07-10 08:12:24 -0500

In EnergyPlus the End Use Subcategory field can be used for reporting. In OpenStudio, most of these fields have not been exposed yet (e.g. ElectricEquipment, Fan:ConstantVolume, Fan:VariableVolume), but for the Fan:ZoneExhaust it is. Entering a name such as "Parking Garage" will add a subcategory to the ABUPS End Use Subcategory table and one to the Energy Meters table.

Field: End-Use Subcategory

Allows you to specify a user-defined end-use subcategory, e.g., “Central System”, etc. A new meter for reporting is created for each unique subcategory (ref: Output:Meter objects). Subcategories are also reported in the ABUPS table. If this field is omitted or blank, the fan will be assigned to the “General” end-use subcategory.

image description

This will report the total annual energy and demand for the exhaust fans. To get the total exhaust fan power for LEED, I use the Equipment Summary report which contains a table for Fans listing the rated electric power. There's also a table for Pumps to check the W/gpm values in this report.

edit flag offensive delete link more


Dear Matthew thanks for the answer

Daniel Mak's avatar Daniel Mak  ( 2015-07-09 19:44:46 -0500 )edit

answered 2015-07-09 14:54:23 -0500

If you need more detail, you can also request the timeseries fan power values for each fan by using the Add Output Variable Measure to request the output called Fan Electric Power. If you check out the eplusout.rdd file, you can see a list of other variables you can request as well.

edit flag offensive delete link more


Thank for the reply, I will check it out later.

Daniel Mak's avatar Daniel Mak  ( 2015-07-09 19:46:51 -0500 )edit

Your Answer

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

Add Answer

Question Tools


Asked: 2015-07-09 04:59:52 -0500

Seen: 290 times

Last updated: Jul 10 '15