By David Wren
In the Lighting program, when the Part L Lighting Compliance Check is selected, the Engineer can view the results of the 'Part L Lighting Building Code'. Efficacy checks can be carried out for either a single room, or for the whole project when in a Multi-Room project. When the Part L Check is called, you will find options for different versions of the Part L Lighting Building Code. With the introduction and wide use of LED light fittings, the latest version of the standard (2022), has revised requirements for the Minimum Building Efficacy.
- The 2022 Standard requires a Minimum Building Efficacy of 95 Lumens per Watt.
- The 2013 Standard requires a Minimum Building Efficacy of 60 Lumens per Watt.
- The 2010 Standard requires a Minimum Building Efficacy of 55 Lumens per Watt.
Depending on the version/year of the project being checked, any one of these three different Calculation Standards can be selected in the Lighting program. The example below shows the results of selecting the 2022 standard with the minimum required Efficacy of 95 Lumens per Watt.
Reports for the selected version of the standard can also be produced showing the appropriate Pass/Fail criteria.
Within the dialog for the Part L Lighting Compliance Check, you also have the options to view and Print the Results of the Efficacy calculation, or the LENI (Lighting Energy Numeric Indicator) calculation for your project.
Please refer to the context appropriate in-program Help (F1) for more information. Plus for a demonstration of a Multi-Room Lighting project set up with examples of Part L2 BRE-498 recognised Room Lighting Control systems for the LENI checks, please refer to the example project - LENI MultiRoom example.CYC.
This project can be found in the Tutorial Projects section, of the Projects tab on the MEPworx Front Screen.