The Building (Amendment) (Wales) Regulations 2022

Amendment of Schedule 1 to the Building Regulations

16.  In Schedule 1 (requirements)—

(a) in Part L, after entry L1 insert—

"On-site generation of electricity

L2. Where a system for on-site electricity generation is installed— (a) reasonable provision must be made to ensure that— (i) the system and its electrical output are appropriately sized for the site and available infrastructure; (ii) the system has effective controls; and (b) it must be commissioned by testing and adjusting as necessary to ensure that it produces the maximum electricity that is reasonable in the circumstances."

Requirement L2 applies only to dwellings.

(b) after Part N of Schedule 1 insert—

"PART O OVERHEATING
Overheating Mitigation
O1.—(1) Reasonable provision must be made to— (a) limit unwanted solar gains in summer; (b) provide an adequate means to remove heat from the indoor environment. (2) In meeting the obligations in sub-paragraph (1)— (a) account must be taken of the safety of any occupant, and their reasonable enjoyment of the building; and (b) mechanical cooling may only be used where insufficient heat is capable of being removed from the indoor environment without it."	Requirement O1 applies only to the erection of the following buildings— (a) a dwelling; (b) an institution; or (c) any other building containing one or more rooms for residential purposes (other than a room in a hotel).