Lighting consumption Part L


Im running a Part L calc for a health care facility, using LED lighting everywhere. the lighting design has been completed according to design standards.

but my actual lighting end use is double the notional. 

what would cause the notional building to be so much lower ?



  • Hi David,

    I'm afraid we are not best placed to comment on such results, as the notional building is entirely down to the calculation methodology defined in SBEM and the NCM - your accreditation scheme provider or BRE (you can contact them here via Feedback) would be much better placed to advise.

    Shane Regan | Senior Building Performance Support Engineer