IES-VE User Forum

An update on this, our developers have confirmed an error in the API obtained Operative Temperature variable and are working to correct this for our next major release (VE 2025) Thanks for bringing this to our attention.


Hi Terence,

Did this get sorted for IES 2025? I still seem to get ...

Thanks Terence,

Is this going to have an impact on the Part O reporting feature?

I'm assuming that is using the API obtained operating temperature.

Ross

Hi,

I basically had the exact same issue.
I got a perfect match with the API and VistaPro in Winter, but it is different in Summer.

https://forums.iesve.com/viewtopic.php?t=78723&sid=447a947b9f167dc5996536c9c53d918a

I haven't been able to solve it. Potentially an adjustment due to clocks changing ...

Hi,

I am working on a script to extract hourly figures for the variable "Operative temperature (TM 52/CIBSE)" from an APS file so it matches the output from VistaPro.

The first obstacle I hit was that VistaPro seems to post process the impact of the air speed. So in the APS file "Dry Resultant ...

Hi Terence,

Thanks for this.
Is there any chance of an integrated ENE01 credit calculator within the IES software?

The issue is the BRE restricts the INP checkers to BREEAM Assessors only.

Constantly emailing BREEAM Assessors INP files is really inefficient when you want to run multiple ...

I've been encouraging IES to bring back their SAP calculation module for 5 years now:

https://forums.iesve.com/viewtopic.php?f=170&t=6038&p=14407&hilit=sap&sid=f2d9aefa3d39b9984a18fd7a397acf13#p14407

There must be a demand if users are seriously considering writing their own code.

It just needs ...

Hi btysoe,

I frequently have this problem, and have never seen any official guidance.

I even found differences in the same weather file.

For example "LondonDSY05.fwt" (from CIBSE 2005 set) aligns differently to the "London_LHR_DSY1.epw" (from CIBSE 2016 set).
Although both of these were recorded ...

Hi R.K.

After numerous attempts, I have never been able to get the IES constructions to align perfectly with provided data.

I think there are various different methods for calculating g-values etc.

Common practise tends to be to get it as close as possible then ensure that the u-value and g-value ...

Hi,

I have been working on a few projects recently with acoustic requirements according to Building Bulletin 93 (2015).

In simple terms, free areas are constrained for acoustic reasons except for the hottest 200 hours in the DSY weather file.

Any ideas of an easy way to model this in IES? Could ...

Hi,

I go down the route of using custom / sharp-edged orifices. But as you say, there is very little clear guidance on working out an equivalent area for a window. A webinar on this would be great...

Assuming you have a top hung window, I would take the equivalent area as the opening distance (i.e ...