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Knowledgebase : SBEM and DSM
The simplification of guidance (paragraph 4.08 Issue 7 NDEPC Conventions) from the NDEPC Conventions Group has instigated a review of our guidance on this. The guidance here is intended to provide improved modelling but does not replace the guidance given...
The advice in the article is for meeting the following extract of convention 6.06. There is separate advice for SBEM and DSM _Where the DHW serves multiple buildings, the losses should be apportioned between those buildings based on floor area.__If the l...
You will see this error when SBEM encounters a problem in processing the calculation data. The cause of the error will not be reported in Errors and warnings. Historically there have been many causes for this error. This article will not list existing his...
This feature was introduced for Scottish Section 63 assessments but can be used to extract any DesignBuilder model from an XML generated using DesignBuilder. This requires the user to download the XML and save it to their system. Note also that DesignBui...
This information is relevant for lodgements in England and Wales (Scotland, Northern Ireland, Eire?) . Landmark requires address details in the following format The address lines need to be input precisely as they appear in Model Options
1. Once your CIBSE weather file order has been paid for you should receive an email with a link to a page on our website which allows you to download the weather data. 2. The file you download will be compressed in .zip format. You should unzip the file ...
This article has been produced specifically for SBEM 5.5.h / DesignBuilder 6.0.1. It may be updated a number of times during 2019 so please check for updates. Please check our approvals page for BER/BRIRL approval status. GENERAL NOTES FOR NEW AND EXIST...
DesignBuilder cannot assign more than one partition construction to a single internal wall plane. This behaviour can cause issues for cases when there is more than one partition type on a single plane. This could for example be a "heavy partition" at grou...
These instructions apply to DesignBuilder version 5. A Section 6 2002 calculation is part of the assessment process for identifying if a building requires a Section 63 analysis and is performed during the EPC calculation. The status of the check BER < ...
These instructions apply to DesignBuilder v5 software. Later versions may not need the steps outlined here. SBEM produces two types of Data Reflection Report. These are presented and formatted differently:     1. PDF format: this is the later format and ...
At the beginning of 2017 the security certificate for SBEM v3.5b expired so any communication between SBEM and the registry gets rejected. BRE released a patch for SBEM that addresses this issue. INSTALLATION NOTES FOR SBEM V3.5B PATCH: 1. Download the...
USING THE CORRECT COMBINATION OF DESIGNBUILDER VERSION AND SBEM VERSION. DesignBuilder approvals are given for specific combinations of DesignBuilder and SBEM and XMLs will not be generated with an incorrect version. This can be followed by an SBEM expi...
EPCS Once a particular building, defined by its UPRN, has had an EPC calculation performed, a credit is deducted from your account. The system deducts a credit each time you enter a new UPRN and run an EPC calculation, so if you are unsure of this inform...
USING THE CORRECT COMBINATION OF DESIGNBUILDER VERSION AND SBEM VERSION. DesignBuilder approvals are given for specific combinations of DesignBuilder and SBEM and XMLs will not be generated with an incorrect version. When importing an existing model int...
RECOMMENDATIONS In the v4.7 release there have been two problems with recommendations. * Any editing of the automatically generated recommendations and the creation/editing of user recommendations will be lost if there is ANY (apart from further rec...
LIGHT TYPES Some light types are not available for Industrial type activities. This problem has been reported by a number of assessors. The types not available through the interface are Tungsten and LED. This bug has been fixed ready for the next releas...
Models created using a copy of DesignBuilder which has only a PAYG SBEM license cannot be loaded to another machine with an annual or perpetual license until a credit has been deducted for the model. The solution is to run an SBEM calculation for the mode...
First check that your building has sufficient hot water demand to make the incorporation of a solar hot water system worthwhile. Also, the solar characteristics need to be carefully set. Forced circulation will increase the auxiliary contribution and addi...
Sub-addresses can be added through your accreditation schemes' website rather than in DesignBuilder. When searching for an address to get the UPRN, there should be an option to add a sub-address. Doing that changes the last digit of the UPRN from a 0 to a...
The XML file required for EPC lodgement is generated by EPCGen when DesignBuilder runs SBEM. Please also see knowledgebase article XML not generated when model loaded into latest approved interface [http://support.designbuilder.co.uk/staff/index.php?/Kn...
SBEM rounds all reported zone general lighting wattages to the nearest 50W and thus any zones with installed lighting power below 25W will be rounded down to zero. Note that for calculations SBEM will use the unrounded wattage.
The usual reason for the 'total useful floor area' being reported smaller than the areas input is that blocks have been drawn using internal measurements without accounting for the fact that blocks should be drawn using external measurements. If you are u...
We have received this answer from BRE support summarising the reasons for differences in SBEM 4 and SBEM 3.5 results: "While the methodology for calculating the asset rating has not changed in the 2010 NCM Modelling Guide (compared to the 2006 Guide), pl...
The version of DesignBuilder SBEM to use depends on the region you are targetting and whether you are producing building regulations compliance reports or EPCs/BERs:England and Wales EPCs:       DesignBuilder v2.4.2 with SBEM 4.1 Part-L2:   DesignBuilder ...
There is a bug with SBEM 3.5.b which causes recommendations to be repeated in the report that is directly generated by SBEM and unfortunately there is nothing we can do about it until the next SBEM is released. However you should find that the final rec...
SBEM v3.5.b and later used in DesignBuilder includes a security function for EPCs in England and Wales requiring final certificates to be obtained from the Landmark database. EPCs displayed within DesignBuilder (and all other SBEM software) will always in...
No, DesignBuilder communicates directly with the SBEM calculation engine and cannot export NCT format files.
The 'main heating fuel' reported at the bottom of the EPC is determined by SBEM as either the heating fuel or the hot water fuel depending on which of these 2 systems consumes more energy. In some buildings, fuel consumption due to hot water generation is...
Ground floor U-values used in constructions adjacent to ground can either be entered as being corrected for 3-D conduction effects or not and the setting to define whether the U-value is corrected or not is set on the Constructions dialog for ground floor...
Vehicle access (and other constructions) will only be shown under Criterion 2 of the BRUKL report if they are positioned in condirioned zones, i.e. zones that are heated.
SBEM always generates the secondary recommendations report with a watermark as it is not part of the official documentation. This is the same behaviour as iSBEM.
This data corresponds to the 'Rating with Improvements' data entered on the calculation options dialog. To obtain this data you should copy the actual model (to a different dsb file) apply the recommendations, note the rating with these measures applied t...
SBEM has an upper limit on the number of surfaces it can handle and this limit can be exceeded for very large buildings. To help get round this problem you can use the option 'Lump similar partitions' found on the Advanced tab of the Model options dialog....
SBEM 3.3.b now allows some domestic activities in predominantly non-domestic buildings such as flats above pubs. This is first implemented in DesignBuilder v.1.9.2. For earlier versions the comment from BRE applies:"SBEM can currently be used for non...
Note from BRE:"The recommendations in the Recommendations Report are grouped into the following sub-sections: short payback (up to 15 recommendations), medium payback (up to 10 recommendations), long payback (up to 5 recommendations), and other recom...
When to use 'Semi-exterior unconditioned' zones The zone type should be set to 'Semi-exterior unconditioned' when the zone is unheated, uncooled, unoccupied and there is no significant energy consuming equipment. Examples include unoccupied roofspaces,...
The failure is probably caused by a heated zone being adjacent to an unheated zone and the partition (wall or internal floor/ceiling) construction between them is uninsulated. To fix the problem either insulate the partition between the heated and unheate...