Hi Matt - Thanks for the project. I've taken a look at it - when specifying an SES system you should also include storage for your HWS system. If you select that option your SES system will be considered. Regards,

Hi Matt, I would firstly advise caution if you are intending to use Part L to determine if natural ventilation is required, as SBEM is not a design tool indicative of real-world conditions. (To see if natural ventilation is required you would need to…