Regulation 9 Amendment to regulation 29 (calculation of deemed annual heat generation)

In regulation 29, for paragraphs (2) to (5) substitute—

“(2)

If the accredited domestic plant is a biomass plant which provides space heating, but not heating for domestic hot water, to the RHI property, the deemed annual heat generation is—

(a)

for an accredited domestic plant with a tariff start date before the second relevant date, the heat demand for space heating specified in the relevant EPC for that property; or

(b)

for an accredited domestic plant with a tariff start date on or after the second relevant date, the lower of—

(i)

the heat demand for space heating specified in the relevant EPC for that property; or

(ii)

25,000 kWh.

(3)

If the accredited domestic plant is a biomass plant which provides both space heating and domestic hot water heating to the RHI property, the deemed annual heat generation is—

(a)

for an accredited domestic plant with a tariff start date before the second relevant date, the heat demand for space heating and water heating specified in the relevant EPC for that property; or

(b)

for an accredited domestic plant with a tariff start date on or after the second relevant date, the lower of—

(i)

the heat demand for space heating and water heating specified in the relevant EPC for that property; or

(ii)

25,000 kWh.

(4)

If the accredited domestic plant is a heat pump which provides space heating, but not heating for domestic hot water, to the RHI property, the deemed annual heat generation is—

(a)

for an accredited domestic plant with a tariff start date before the second relevant date, calculated in accordance with the following formula—

$$A\times \left(1-\frac{1}{B}\right)$$

where—

1. (i)

   A is the heat demand for space heating specified in the relevant EPC for that property; and

2. (ii)

   B is the seasonal performance factor for the heat pump; or

(b)

for an accredited domestic plant with a tariff start date on or after the second relevant date, the lower of—

(i)

the result of the formula in sub-paragraph (a); or

(ii)

the result obtained from applying the following formula—

$$C\times \left(1-\frac{1}{B}\right)$$

where—

1. (aa)

   C is 20,000 kWh in the case of an air source heat pump, or 30,000 kWh in the case of a ground source heat pump; and

2. (bb)

   B is the seasonal performance factor for the heat pump.

(5)

If the accredited domestic plant is a heat pump which provides both space heating and domestic hot water heating to the RHI property, the deemed annual heat generation is—

(a)

for an accredited domestic plant with a tariff start date before the second relevant date, calculated in accordance with the following formula—

$$A\times \left(1-\frac{1}{B}\right)$$

where—

1. (i)

   A is the heat demand for space heating and water heating specified in the relevant EPC for that property; and

2. (ii)

   B is the seasonal performance factor for the heat pump; or

(b)

for an accredited domestic plant with a tariff start date on or after the second relevant date, the lower of—

(i)

the result of the formula in sub-paragraph (a); or

(ii)

the result obtained from applying the following formula—

$$C\times \left(1-\frac{1}{B}\right)$$

where C and B have the same meaning as in paragraph (4).”.