Where the heating system proposed has an efficiency of no greater than 100%, this specification includes an element of onsite generation in the form of photovoltaic panels, which contributes to improved energy targets.Following revision of standards on 1 February 2023, building regulations encourage the proportionate and effective use of on-site generation of power as part of a new building specification, recognising only that portion of generation which can be used or stored at the building, excluding any energy exported to the grid. S6W...