15.—(1) This regulation applies where the plant—
(a)is generating heat solely for the use of one domestic premises;
(b)is, in the Department’s opinion, generating heat solely for an ineligible purpose; or
(c)is a plant which—
(i)is additional RHI capacity within the meaning of regulation 42(2) and was first commissioned more than 12 months after the original installation was first commissioned;
(ii)generates heat from biogas or using a solar collector; and
(iii)has an installation capacity which, together with the installation capacities of all related plants, is 200kWth or above.
(2) For the purposes of this regulation—
“domestic premises” means single, self contained premises used wholly or mainly as a private residential dwelling where the fabric of the building has not been significantly adapted for non-residential use;
“related plant” means any plant for which an application for accreditation has been made (whether or not it has been accredited) which uses the same source of energy and technology and forms part of the same heating system as the plant referred to in paragraph (1)(c).