10. This regulation applies if the plant complies with all of the following requirements—
(a)it is an air source heat pump;
(b)in the case of a plant with an installation capacity of 45kWth or less, the plant meets the requirements in regulation 18;
(c)it has a coefficient of performance of at least 2.9;
(d)it has been designed and installed to operate with a seasonal performance factor of at least 2.5;
(e)it is not designed to provide cooling; and
(f)it is not designed to use heat in air which has been expelled—
(i)from a building; or
(ii)directly from a process which generates heat.