Updates

Definitive list of updates to iSBEM

Below is a list of all the updates and new features made to each new release of iSBEM. Further details of these features are covered in the iSBEM User guide.


The key features implemented in iSBEM v5.2.g (compared to iSBEM v5.2.d) are as follows:

  • Inclusion of the 2015 Scottish notional building specifications and target emissions for checking compliance with Section 6 of the 2015 building regulations in Scotland.
  • New feature to allow creation of scenario of improvement measures for the purpose of calculating the potential asset rating for Scotland EPC.
  • Comparative asset rating in England is now calculated automatically by the software.
  • Inclusion of new purpose of analysis for Scotland Section 63 assessments.
  • Purposes of analyses restricted to:
  • Compliance assessment with England 2013 Part L2A
  • EPC and XML file for England
  • Compliance assessment with Wales 2014 Part L2A
  • EPC and XML file for Wales
  • Compliance assessment with Scotland 2015 Section 6
  • EPC and XML file for Scotland
  • Green Deal assessment for England, Wales, and Scotland

The key features implemented in iSBEM v5.2.d (compared to iSBEM v5.2.b) are as follows:

Inclusion of the 2014 Welsh notional building specifications and target emissions for checking compliance with Part L2A of the 2014 building regulations in Wales.

Purposes of analyses restricted to:

  • Compliance assessment with England 2013 Part L2A
  • EPC and XML file for England
  • Compliance assessment with Wales 2014 Part L2A
  • EPC and XML file for Wales
  • Green Deal assessment for England and Wales

 The key features implemented in iSBEM v5.2.b (compared to iSBEM v4.1.e) are as follows:

  • The 2013 notional building specifications and methodology for checking compliance with the 2013 Part L2A of the Building Regulations in England (which came into force on 6th April 2014).
  • Enhanced methodology for modelling PVs.
  • Enhanced methodology for modelling movable window shading devices.
  • Facility for modelling non-transpired solar collectors.
  • Facility to carry out Green Deal analysis*.
  • Purposes of analyses available:
    • Compliance assessment with England 2013 Part L2A

    • EPC and XML file for England

    • Green Deal assessment

    • Compliance assessment with Building Bye-laws Jersey Part 11

* If a Green Deal project has been started in iSBEM v5.1.c, it should be completed in the same version. It is inadvisable to convert existing Green Deal projects “mid-scenario”, i.e., after improvement measures have already been added, from iSBEM v5.1.c to iSBEM v5.2.b. However, new Green Deal projects can be started in iSBEM v5.2.b, and existing projects can be converted only if they are still at the baseline stage, i.e., no scenarios or measures have yet been created.   


New aspects of iSBEM_v4.1.e

For a full list of changes made to iSBEM v4 please refer to the user guide

  • Applying the modified specifications in the updated 2010 NCM Modelling Guide with regards to metal-clad constructions.
  • Implementing compliance with 2012 building regulations for Northern Ireland.
  • Implementing generation of XML file for EPC Scotland, along with adding new related input parameters.
  • Implementing the calculation of the primary energy, for the purposes of both the XML file for EPC Scotland and the EPBD Recast reporting.
  • Implementing the requirements of the EPBD Recast regarding consideration of alternative energy systems in the design of new projects.
  • Modifying the reporting of results in the BRUKL output report with regards to U-values compliance for modular and portable buildings constructed from older modules on which the back-stops for U-values in the 2010 building regulations do not apply.
  • Modifying the reporting in SBEM so that the heating demand for unconditioned zones is displayed in the BRUKL output report (similar to the cooling demand).
  • Rectifying a problem that caused the bivalent calculation in SBEM to crash if it were run on certain platforms/operating systems.
  • Rectifying a problem that caused the calculation in SBEM to crash if there were no heat loss envelopes in the building.
  • Allowing the iSBEM interface to write the cooling fuel type into the input file as selected by the user using the drop-down menu for the “Heating and mechanical cooling” default HVAC system.

New aspects of iSBEM_v4.1.d

For a full list of changes made to iSBEM v4 please refer to the user guide

Below is a list of the key modifications in iSBEM v4.1.d (compared to v4.1.c) are as follows:

  • Modifying the method by which connection to Landmark for verification of energy assessors before the generation of XML files.
  • As a consequence of the above point, activation codes will no longer be needed, i.e., energy assessors will no longer need to obtain activation codes from EPCgen.net to input them into the software in order to be able to generate XML files.
  • Updates to the NCM databases.
  • Correction of the alpha value and building conductance reported in the sim O/P files when the building includes non-planar rooflights.
  • Correction of the use of the multiplier so that the input of windows (or doors) with a multiplier >1 causes the lengths of the thermal bridge junctions (rather than the areas) to be the same as if the individual windows (or doors) were entered as separate objects instead of using the multiplier.
  • Modifying SBEM so that the alpha value for the U-values of the reference building (and notional buildings that use alpha values rather than psi values) is applied in a way that allows the calculated heat transfer through thermal bridges to be reported separately in the sim files from the heat transfer through the fabric alone.
  • Modifying the reported energy consumption by end use to include the energy consumed (for heating, cooling, and HW) and displaced by CCHP, if applicable.
  • Enhancements to the iSBEM interface, e.g.,
    a. If the default heating or cooling efficiency default radio button is not selected, then the fields relating to the ECA and installation after 1998 become inactive in the heating, cooling, and HW sub-tabs.
    b. Adding a drop-down menu to allow selection of fuel type for cooling generator for the "Heating and mechanical cooling" default HVAC system.
  • Enhancements to the BRUKL modules, e.g.,
    a. Reporting the hot water storage losses in kWh/litres of storage in the BRUKL O/P document if the monthly losses, in MJ, are input manually by the user.
    b. Reporting the lighting wattage for each zone rounded to the nearest 10 Watts instead of 50 Watts.

New aspects of iSBEM_v4.1.c  

For a full list of changes made to iSBEM v4 please refer to the user guide

Below is a list of the key modifications in iSBEM v4.1.c (compared to v4.1.a) are as follows:

  • For "distress purchase" modular and portable buildings with a planned time of use of less than 2 years, a "less pessimistic" set of default values of luminous efficacies for certain lamp types are used in the energy calculations. This would occur if the lighting definition for the zones in the project is input using lamp types in iSBEM as opposed to using full lighting design. A new tick box for "distress purchase" definitions has therefore been added to the tool.
  • Allowing the calculation to run for generating EPCs for modular and portable buildings.
  • Enhancing the compliance output report produced by BRUKL by reporting the lighting wattage for each zone, as well as some indicative target values for the building.
  • Updating NCM Activity Database with regards to some set values and schedules for some activities.
  • Correcting a problem in the display of the average conductance and average U-value for the notional building in the Technical Data Sheet.
  • Allowing the generation of EPCs with negative asset ratings.
  • Enhancing the SBEM Main Output report with more graphs which demonstrate the actual and notional buildings energy demands.
  • Modifying the auxiliary energy calculation to align with the latest NCM Modelling Guide.
  • Re-introducing the back sensors in the lighting definition of zones with photoelectric controls and modifying the lighting energy calculation to align with the latest NCM Modelling Guide.

New aspects of iSBEM_v3.5.b

Compared to v3.5.a, iSBEM_v3.5.b contains the following changes:

  • Added feature in iSBEM so that if using Access 2007, the "import details" facility for energy assessors allows accessing files types "*.accdb" rather "*.mdb".
  • Modifications related to Landmark's environment for validating status of energy assessors when producing EPCs.
  • When energy assessors' activation codes are input into iSBEM, v3.5.b will generate the XML message as usual, but the PDF documents for the EPC and Recommendations Report will now always be watermarked. Assessors can obtain the unwatermarked PDF documents after lodgement in the Landmark registry through the standard report retrieval system (for further clarifications, contact your Accreditation Scheme Provider).
  • Includes an updated NCM Constructions Database which contains revised Irish constructions for the RoI calculations.
  • Correction of a problem with creating the PDF data reflection report which, in certain cases, caused a crash.
  • Correction of lighting voltage management credit for the calculation of Scottish EPCs.
  • Correction of issue in the generation of the notional building in certain cases which resulted in a crash when trying to create a window of a very small area.
  • Adjustment of text display in BRUKL and BRIRIL to prevent overlapping of text in certain cases when generating the compliance documents.
  • Modification in order to prevent a roof with metal-cladding from affecting the thermal bridging junctions for wall-floor in certain cases.
  • Correction of reported actual building's heat transfer coefficients and alpha value in the output sim files. 

New aspects of iSBEM_v3.5.a

Changes in SBEM v3.5.a which could have an impact on the calculated results compared to v3.4.a

  • A new parameter for the frame factor of windows and rooflights has been added to replace the fixed value within SBEM. This would affect daylighting and solar gains calculations.
  • A modified calculation for hot water storage size and storage losses, which would affect the water heating energy calculation.
  • An enhanced calculation of the performance of solar water heating systems and their contribution to water heating.
  • A correction in the application of the system distribution efficiency to the solar water heating contributions in the calculations of the water heating energy.
  • A modified approach to dealing with the auxiliary energy for the notional building if the servicing strategy in the corresponding zone in the actual building is heating and mechanical ventilation.
  • A modified calculation of the heating demand of the notional building if the servicing strategy the corresponding zone in the actual building is heating and mechanical ventilation.
  • A modified approach for dealing with display windows in the actual and notional buildings with respect to U-values and transmittances. This would affect daylighting, solar gains, and heat losses calculations.
  • A correction of the auxiliary energy calculation for fan heaters.
  • A modified approach to dealing with display lighting in the notional building if the actual building has time control for display lighting.
  • A new adjacency for envelopes has been added to allow a better assessment of the thermal mass of internal envelopes contained within a zone formed by the merging of two or more contiguous zones.

Minor or display changes in SBEM beta v3.5.a with little or no impact on results

  • A modification to allow the software to increase the size of an envelope if the total area of the windows and doors defined within it exceeds the input area of the envelope.
  • A modification to allow the CO2 emissions attributed to CHP to be reported separately in the "csv" file and the secondary recommendations report for info.
  • A correction of a multiplier problem which affected the total areas of envelopes, windows, etc, reported in the "sim" files.

New aspects of iSBEM version 3.4.a

Changes and additions in 29th April 2009 version 3.4.a:

  • Revised definition of the Reference building
  • Guidance on tips for gathering information for iSBEM
  • Guidance for users of Office 2007
  • Guidance on sources of help information
  • Guidance on Activation Codes for Energy Assessors
  • Guidance on the rating with improvements field for Scottish EPCs inthe General form
  • Guidance on zone height
  • Guidance on adjacency of envelopes
  • Guidance on consequences of changing the HVAC system type
  • Guidance on bivalent systems
  • Guidance on CHP
  • Guidance on default HVAC systems
  • Guidance on lamp types
  • Guidance on sub-dividing zones due to daylight
  • Guidance regarding the building environment and main heating fuel for a building with no space or water heating

Changes related to new functionality of the iSBEM version 3.4.a.

  • Revised definition of the Reference building
  • EPCs for unconditioned buildings
  • System configuration tab in the General form
  • A new tick boxes in the General form for:
    • To control the clearing of the contents within the Quick Envelopes tab
    • Entering glazing using areas or percentages.
  • A new sub-tab for Helpline Diagnosis
  • A new sub-tab for Air Conditioning Inspection data
  • New sub-tab for viewing Calculation Logs in the Ratings form
  • New sub-tab for viewing Calculation Errors in the Ratings form
  • New sub-tab for viewing received Messages in the Ratings form

New aspects of iSBEM version 3.3.b

Changes and additions in 22nd December 2008 version 3.3.b:

Further explanation or clarification of existing parameters and functionality of iSBEM.

  • Guidance on communal areas that accompany units with independent heating systems when using iSBEM to produce an EPC
  • Guidance on the Asset Rating calculation
  • Guidance deciding whether iSBEM is appropriate to model a building
  • Guidance on internal walls between merged zones
  • Guidance on zoning rules
  • Guidance on system requirements
  • Cm value renamed to κm
  • Guidance on the number of object to create in a project
  • Guidance on zone height
  • Guidance on adjacency for envelopes
  • Guidance on defining fully glazed envelopes
  • Guidance on the default HVAC systems
  • Guidance on heat recovery options
  • Guidance on auxiliary energy
  • Guidance on bivalent systems
  • Modified options for cooling generator types
  • Guidance on metering provision for lighting and for individual HVAC systems
  • Guidance on system controls
  • Guidance on indirectly conditioned spaces
  • Guidance on how to define a zone that has more than one HVAC system
  • Guidance on SFP for mechanical ventilation systems
  • Guidance on mechanical exhaust system in the zones
  • Guidance on defining lighting in the zones
  • Guidance on defining lighting controls in the zones
  • Guidance on recommendations
  • Guidance regarding an undefined building environment
  • A "key to symbols" has been added to the Technical Data Sheet of the BRUKL output document
  • Guidance on error files

Changes related to new functionality of the iSBEM version 3.3.b.

  • Version of iSBEM specifically for users of Office 2007
  • New section on sources of help information
  • New tab for Local Area Network Settings in the General form > File Options tab
  • New layout and funcationality in the General form > General Information tab > Energy Assessor Details sub-tab > Energy Assessor Details sub-form
  • New field for the EPCgen.net Activation Code for the Energy Assessor in the General form > General Information tab > Energy Assessor Details sub-tab > Energy Assessor Details sub-form
  • Difference default values for air permeability depending on the purpose of analysis
  • New domestic-type activities added to the building type Dwelling
  • New tick box to define variable speed pumping for central heating systems using water
  • New parameter to define cooling fuel type
  • New fields and functionality in the CHP tab to allow for tri-generation
  • New parameter to define the parasistic power for occupancy sensing lighting controls in a zone
  • New sub-tab to separate the parameters on display lighting from the rest of the general lighting and controls parameters  

New aspects of iSBEM version 3.2.b

Further explanation or clarification of existing parameters and functionality of iSBEM.

  • Guidance on the notional building fuel
  • Guidance on EPCs in Scotland
  • Guidance on features which cannot currently be represented in SBEM
  • Guidance on Glazing types
  • Guidance on the building rotation parameter in the Geometry form
  • Guidance on area ratio covered parameter in the Geometry form
  • Guidance on the calculation of the heating system seasonal efficiency and the cooling system seasonal energy efficiency ratio
  • Guidance on HVAC system types
  • Guidance on SFP for mechanical ventilation systems with heat recovery
  • Guidance on defining trace heating in iSBEM
  • Guidance on hot water storage when a SES is connected to the HWS
  • Guidance on destratification fans
  • Guidance on occupancy sensing for lighting control
  • Guidance on user-defined and user-edited recommendations
  • Guidance on the Recommendations report  

Changes related to new functionality of the iSBEM version 3.2.b.

  • New separate User Guide to provide guidance on using iSBEM for the purposes of energy calculations for the Republic of Ireland Building Regulations
  • New tick box in the General form > File Options tab > System Configuration sub-tab to control the generation of the Data Reflection reports in html format
  • New field in the General form > General Information tab > Project Details sub-tab and a new Keys sub-form in the General form > General Information tab > Energy Assessor Details sub-tab related to security keys
  • A secondary recommendations report for EPCs in England, Wales, and Northern Ireland
  • An additional pdf file is generated when an EPC in the Welsh language is required
  • New activity for "Food Preparation Area" in "Nursing, residential homes and hostels" building type

New aspects of iSBEM version 3.1.a

Further explanation or clarification of existing parameters and functionality of iSBEM.

  • Guidance on reference documents for further information (Calculation basics for Building Regulations compliance purposes and Calculation basics for Energy Performance Certificate purposes).
  • Guidance on features which cannot currently be represented in SBEM
  • Further guidance on the UPRN in the General form > General Information tab > Building Details sub-tab
  • Further guidance on the registration number of the energy assessor in the General form > General Information tab > Energy Assessor Details sub-tab
  • Further guidance on shading from overhangs and fins
  • Further guidance on the System Controls sub-tab in the Building Services form > HVAC Systems tab
  • Further guidance on exhaust air flow rate
  • Further guidance on selecting lamp types

Changes related to new functionality of the iSBEM version 3.1.a.

  • New additional line for the building address and new layout for the Building Details sub-tab in the General form > General Information tab
  • Button for running an asset rating calculation without generating XML files has been removed from the Ratings form > Asset Rating tab > Building Rating sub-tab
  • Only one XML file is generated when running the asset rating calculation and generating and EPC

New aspects of iSBEM version 3.0.a

  • New options available for the 'Purpose of Analysis' parameter in the General form
  • New distribution of parameters and sub-tabs in the General form
  • New tick box on producing EPCs in Welsh in the General form Project
  • New tick box on running a compliance check with building regulations as well as producing an EPC in the General form of the building in the General form
  • New parameter on the asset rating of the building with improvements in the General form
  • New parameter on related party disclosure in the General form
  • New parameter on building location description in the General form
  • New parameter on the UPRN in the General form
  • New parameter on the inspection date in the General form
  • New tick box on the conservation status of a building in the General form
  • New parameter on the registration number of the energy assessor in the General form
  • New parameter on the membership number of the qualified/accredited person in the General form
  • New parameter on the accreditation scheme of the energy assessor in the General form
  • New parameter on the protocol organisation of the qualified/accredited person in the General form
  • New parameter on the qualifications of the energy assessor in the General form
  • Reporting of the ID number given by iSBEM to each envelope in the Geometry form
  • New parameter for envelope ID number in the Geometry form
  • New default HVAC system options in the Geometry form>
  • New parameter on ratio of roof area covered by array of rooflights to the area of rooflight glazing in the Geometry form
  • New Global and Defaults tab in the Building Services form
  • New HVAC System Defaults sub-tab in the Building Services form
  • New (renamed) Metering Provision sub-tab in the Building Services form
  • New System Controls sub-tab in the Building Services form
  • New tick box on mixed mode cooling in the Building Services form
  • New radio button on the axis of the wind turbine in the Building Services form
  • New parameter on the area swept by the rotor blades of the wind turbine in the Building
  • New parameter on the heat efficiency of the CHP generator in the Building Services form
  • New parameter on the electrical efficiency of the CHP generator in the Building Services form
  • New guidance on the calculation of heat to power ratio of the CHP generator in the Building Services form
  • New display of results regarding risk of overheating in the zone in the Building Services form
  • New parameters on daylight zoning in the Building Services form 
  • New layout and functions in the Ratings form
  • New EPBD Audit sub-tab in the Ratings form
  • New layout and functions in the Building Rating sub-tab of the Ratings form
  • New layout and functions in the Recommendations sub-tab of the Ratings form
  • New layout for the Recommendations report

Updates made to iSBEM_v3.0.b

  • New sub-form for details of the energy assessor's insurance in the General form
  • Number of corners parameter is no longer required in the Geometry form
  • New parameter on the CO2 conversion factor for district heating in the Building Services form
  • New requirements for lighting definition options for the zone in the Building Services form
  • New button for running an asset rating calculation without generating XML files in the Ratings form

Updates made to iSBEM_v2.0.c

The new features and improvements of iSBEM version 2.0.c are listed below.

  • Corrected issue in iSBEM which could cause crash in some cases: Users were reporting that iSBEM v2.0.b crashed in certain circumstances. iSBEM has been reconfigured to avoid using the feature of MS Access that was causing the problem.
  • Fixed issue in iSBEM which could cause the interface to run slowly in some cases:  In some cases with iSBEM v2.0.b, the interface became very slow or freezes when there are a large number of envelope elements in a zone. iSBEM has been reconfigured to avoid using the feature of MS Access that was causing the problem.
  • Improvement to error reporting: Modified iSBEM error message: "building has not been properly defined" to include file path containing further information.
  • Check of construction database: Remove numbers from names in construction database
  • Fixed problem with displaying of the envelope elements in the Windows and rooflights tab: An incorrect list of envelope elements was shown in v2.0.b This has been corrected
  • Added extra information to summary tabs: In v2.0.b, object properties were not displayed in the summary tabs for rooflight objects. These have been added to the summary.
  • Made changes so that fields can not be left blank in iSBEM: Changes have been made to the interface so that fields (including the multiplier fields) can no longer be left blank.

New aspects of version 2.0.b

The new features and improvements of iSBEM version 2.0.b are listed below. The New User guide also includes further guidance on a large number of existing parameters (not listed below).

  • Modifications to compliance document and compliance checks: The compliance check for window u-values should be for the window with vertical inclination and not for the u-value corrected for inclination. This is as stated in ADL2a. Previous versions were checking the corrected u-values and this has been changed to now check the uncorrected figures.
  • Changes involving Notional SFP: New tick box added to indicate whether activity in zone requires high pressure drop air filters (e.g. HEPA filters).
  • Changes to heat recovery: The list of heat recovery options in SBEM/ iSBEM has changed from the types listed in the Dutch methodology to UK types from CIBSE. The option for users to enter their own heat recovery efficiency has also been added in iSBEM.
  • Extract System: For local zone extract, there is now the option of 2 types in iSBEM and SBEM: "Extract system serving multiple spaces" and "Extract system serving a single room". These systems have different limiting SFPs in the non domestic heating, cooling and ventilation guide
  • Changes to HVAC systems: Added new heat source "Direct gas firing".Added new HVAC system "Single room cooling" based on "Split or multi-split system with natural ventilation"
  • Lighting algorithm to interpolate rather than rounding when extracting values from tables: This makes the results smoother and avoids big jumps in lighting results when we move from one table row to another.
  • Corrected bug handling activities with HVAC system hours equal to 0 for any month: In school buildings this caused heating consumption to be positive during August when the building should be unoccupied.
  • Show default values to users in iSBEM for DHW storage losses and circulation losses: Previously users could not see the default DHW parameter values used where they did not enter a value in one or more of the DHW storage system or secondary circulation fields. Modifications have been made to SBEM and iSBEM so that after running the default values are loaded in iSBEM.
  • User-defined construction database added: This allow users to build up a database of commonly used constructions so that they do not need to be re-entered in each new project. Users can also import constructions into the user library from iSBEM projects or from another User Library.
  • Activity database changes: Added new activity for Flat communal areas so that it is clear which activity users should choose for these areas
  • Changes to interface: Added Building Navigation form to interface. Using the Building Navigation form, users can view all the objects in their project and can see specific information about each object, such as U-value or construction type.
  • Changed notional rooflight and window transmittance: In some buildings, the definition of window area and performance for the notional building is not properly representing the daylighting and solar gain aspects. To address this, the proportion of solar radiation and daylighting transmitted by a given area of glazing has been adjusted by reducing the effective solar and lighting transmittance parameters for notional rooflights and windows.
  • Changes relating to use of SBEM for Scottish building regulations S6: Made changes in order to enable SBEM/ iSBEM to check compliance with Scottish building regulation section 6.
  • Changes to auxiliary energy calculation for fanned warm air heaters (flued or unflued): For fanned warm air heaters (flued or unflued), the previous auxiliary energy figure could in some case be too high. The auxiliary energy for these systems only is now calculated from the total heating demand for the space, using either a default factor of 0.02 kWh of auxiliary energy per kWh of heating or a value entered by the user in iSBEM.
  • ECA options for split systems: ECA options are now available for split systems.
  • Valley gutters warning: Valley gutters warning added to iSBEM for certain activities
  • Added UnfluedHVAC warning: A warning has been added at zone level when unflued HVAC systems are assigned to a zone in order to warn users that they should not use unflued appliances in naturally ventilated spaces.
  • Description of activity added to iSBEM: When an activity is selected for a zone, iSBEM now shows a description of that activity. This ensures that users select a suitable activity for each zone in their building. Previously this description was only included in the activity database.
  • Corrected a number of minor bugs related to:  DHW generator secondary circulation pump energy has now been added to the calculation. - some cases when the area of doors added to a wall was greater than the wall area - calculation of the time factor for both heating and cooling - user entered value for the exhaust flow rate was not being passed to the notional building

New aspects of version 1.2.a

The new features of iSBEM version 1.2.a are listed below along with where you can find information relating to these new features in the User Guide. The New User guide also includes further guidance on a large number of existing parameters (not listed below). The User Guide can be downloaded from the "download" page of this website

General form - two new fields: purpose of the analysis to be carried out on the project and stage of analysis (see Section 3.4: Creating new and opening existing projects and Section 6.3.2: General Information tab:).

  • Heating system sub-tab - one new field: heat generator radiant efficiency (see Section 6.6.1: Defining the HVAC Systems).
  • Zones tab in the Building Services form - re-organization of the parameters previously in the HVAC and DHW Systems sub-tab onto the re-named HVAC, DHW, and Lighting Systems sub-tab and the new Ventilation and Exhaust sub-tab (see Section 6.6.7: Defining the zone specific building services).
  • Zones tab in the Building Services form - one new field: lighting system selection, which is not yet active but will be in future versions of the tool (see Section 6.6.7: Defining the zone specific building services).
  • Lighting (General) sub-tab in the zone building services tab - one new field: design illuminance (see Section 6.6.7: Defining the zone specific building services).
  • DHW Generators tab in the Building Services form - one new field: Generator seasonal efficiency (see Section 6.6.2: DHW generator definition). 
  • General tab in the Building Services form - one field removed: Recirculation or flow reduction (see Section 6.6.1: Defining the HVAC Systems).
  • Ventilation & Exhaust sub-tab in the Building Services form - one new field: Demand-controlled ventilation (see Section 6.6.7: Defining the zone specific building services).
  • Ventilation & Exhaust sub-tab in the Building Services form - one new field added so that now there is one field for supply SFP and one field for exhaust SFP (see Section 6.6.7: Defining the zone specific building services).
  • Ventilation & Exhaust sub-tab in the Building Services form - one field removed: Recirculation or flow reduction (see Section 6.6.7: Defining the zone specific building services).
  • General & Geometry sub-tab in the General form - one new field: Building (clockwise) rotation (see Section 6.5.2: Project tab).
  • General & Geometry sub-tab in the General form - one field removed: Is the Building modular/portable with use of
  • Ratings form - Building Regulations Check tab replaces Part L check (see Section 7.1.1: Building Regulations Check tab).
  • General sub-tab of HVAC Systems tab - one field removed: Multiplier (see Section 6.6.1: Defining the HVAC Systems).
  • General sub-tab of DHW Systems tab - one field removed: Multiplier (see Section 6.6.2: DHW generator definition).
  • Lighting (General) sub-tab in the Building Services form - changes to zonal lighting options (see Section 6.6.7: Defining the zone specific building services).
  • Lighting (Controls) sub-tab in the Building Services form - one new field: type of photoelectric sensors (see Section 6.6.7: Defining the zone specific building services).
  • Smoke vents are no longer input into iSBEM or used in the calculation (see Section 6.5.4: Defining the zones' envelopes - in the Envelope tab).
  • Default Psi values for thermal bridges of junctions involving metal cladding are already compliant with MCRMA standards (see Section 6.5.2: Project tab).
  • New function for refreshing envelope adjacencies in the Envelopes Summary sub-tab (see Section 6.5.4: Defining the zones' envelopes - in the Envelope tab).

Updates made to iSBEM_v1.0.b

Below are listed some of the updates and improvements made to iSBEM_v1.0.b

Interface:

  • Version check. Updated
  • Some text has been change to make it easy to understand
  • Smoke vents. Sorted minor problem
  • Power factor correction. Parameter added
  • HVAC & Lighting metering. Updated.

Calculation engine:

  • U-value calculation. Corrected minor problem
  • Power factor correction. Parameter added
  • HVAC & Lighting metering. Updated.
  • Display windows in Notional building. Corrected minor problem
  • Fuel types list updated

Outputs and data reflection reports:

  • Thermal bridges. Corrected minor problem
  • Number of digits in numeric outputs. Updated
  • Date in reports. Added.
  • Efficiency of HVAC systems. Updated