Result changes between 2006, 2010 and 2013 regulations


	Applies To

	Product(s):	Hevacomp Software
	Version(s):	V8i
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

A number of changes were introduced to the SBEM calculation between versions 3.5 (2006) and 4.1 (2010). Further changes have been implemented in version 5.2 (2013).

Method

Your accreditation scheme provider should always make you aware of changes to calculation methods, however the following information may assist.

SBEM 4.1 (2010) calculation engine:

"While v4.1.a includes adjustments to a few issues raised through user feedback, the most important modification in this versions, compared to v4.0.c, is the upgrade to the calculation methodology for heating and cooling demand within SBEM to the final published version of BS EN ISO 13790:2008 - Energy Performance of Buildings - Calculation of Energy Use for Space Heating and Cooling. The latest version of this standard contains revised methodologies for calculating the heating cooling utilization factors and intermittency adjustments for heating and cooling demands, and SBEM is being modified to align with the ISO standard." (From the BRE website)

SBEM 5.2 (2013) calculation engine:

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 6^th April 2014).
Enhanced methodology for modelling PVs.
Enhanced methodology for modelling movable window shading devices.
Facility for modelling non-transpired solar collectors.

A detailed breakdown of the different features of each SBEM version can be found here.

For an important note on the PartL calculation, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!