iSBEM HVAC System Error Message

It has been brought to our attention that in certain circumstances in the latest release of iSBEM, the software crashes upon running the calculation. This error is caused when HVAC systems has been assigned to certain zones in certain building/activity types. The error displayed upon calculation is below:

Looking at the iSBEM User Guide, the following statement confirms that this is an intended outcome of the software based on the NCM activity database. This has also been confirmed by BRE.

The following zones in these building and activity types cannot have HVAC assigned as they will not calculate.

Building Type Activity Type
Offices and Workshop businesses Light plant room
Hotels Light plant room
Restaurant and Cafes/Drinking Establishments and Hot Food takeaways Light plant room
General Industrial and Special Industrial Groups Light plant room
Storage or Distribution Light plant room
Retail and Financial/Professional services Light plant room
Residential Institutions - Hospitals and Care Homes Light plant room
Others - Passenger terminals Light plant room
Others - Emergency services Light plant room
Non-residential Institutions - Libraries Museums and Galleries Light plant room
Non-residential Institutions - Community/Day Centre Light plant room
Non-residential Institutions - Primary Health Care Building Light plant room
Non-residential Institutions - Crown and County Courts Light plant room
General Assembly and Leisure plus Night Clubs and Theatres Light plant room
Non-residential Institutions - Education Light plant room
Secure Residential Institutions Light plant room
Residential Institutions - Residential schools Light plant room
Residential Institutions - Universities and colleges Light plant room
Others - Car Parks 24 hrs Circulation area (corridors and stairways)
Others - Car Parks 24 hrs Light plant room
Others - Car Parks 24 hrs Car Park
Retail and Financial/Professional services Car Park
Offices and Workshop businesses Car Park

.

Going forward in the new release. if there is HVAC present in these zones, it will have to be disregarded, as you will not be able to calculate the software. Instead, you will need to select ‘Zone without HVAC’. This should be stated in your site notes why this has been done.

The latest version of the software is 6.1.c – please download this from https://www.uk-ncm.org.uk/