Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Part L
	Subarea:	N/A

Overview

Heating System Controls are greyed out on the Part L HVAC Systems tab.

Solution

These control settings will remain greyed out for Building Regulation Compliance checks, as they are relevant to the Recommendations Report only. Please refer to the iSBEM User Guide for further information:

 

To activate these options you will need to go to the Project tab and set the Type of Analysis to EPC England, or similar.