http://www.legislation.gov.uk/id/eur/2013/811/adopted

ANNEX IIEnergy efficiency classes

1.SEASONAL SPACE HEATING ENERGY EFFICIENCY CLASSES

The seasonal space heating energy efficiency class of a heater, with the exception of low-temperature heat pumps and heat pump space heaters for low-temperature application, shall be determined on the basis of its seasonal space heating energy efficiency as set out in Table 1.

The seasonal space heating energy efficiency classes of a low-temperature heat pump and a heat pump space heater for low-temperature application shall be determined on the basis of its seasonal space heating energy efficiency as set out in Table 2.

The seasonal space heating energy efficiency of a heater shall be calculated in accordance with points 3 and 4 of Annex VII, for heat pump space heaters, heat pump combination heaters and low-temperature heat pumps under average climate conditions.

Table 1Seasonal space heating energy efficiency classes of heaters, with the exception of low-temperature heat pumps and heat pump space heaters for low-temperature application

Seasonal space heating energy efficiency class	Seasonal space heating energy efficiency η_s in %
A⁺⁺⁺	η_s ≥ 150
A⁺⁺	125 ≤ η_s < 150
A⁺	98 ≤ η_s < 125
A	90 ≤ η_s < 98
B	82 ≤ η_s < 90
C	75 ≤ η_s < 82
D	36 ≤ η_s < 75
E	34 ≤ η_s < 36
F	30 ≤ η_s < 34
G	η_s < 30

Table 2Seasonal space heating energy efficiency classes of low-temperature heat pumps and heat pump space heaters for low-temperature application

Seasonal space heating energy efficiency class	Seasonal space heating energy efficiency η_s in %
A⁺⁺⁺	η_s ≥ 175
A⁺⁺	150 ≤ η_s < 175
A⁺	123 ≤ η_s < 150
A	115 ≤ η_s < 123
B	107 ≤ η_s < 115
C	100 ≤ η_s < 107
D	61 ≤ η_s < 100
E	59 ≤ η_s < 61
F	55 ≤ η_s < 59
G	η_s < 55

2.WATER HEATING ENERGY EFFICIENCY CLASSES

The water heating energy efficiency class of a combination heater shall be determined on the basis of its water heating energy efficiency as set out in Table 3.

The water heating energy efficiency of a combination heater shall be calculated in accordance with point 5 of Annex VII.

Table 3Water heating energy efficiency classes of combination heaters, categorised by declared load profiles, η_wh in %

	3XS	XXS	XS	S	M	L	XL	XXL
A⁺⁺⁺	η_wh ≥ 62	η_wh ≥ 62	η_wh ≥ 69	η_wh ≥ 90	η_wh ≥ 163	η_wh ≥ 188	η_wh ≥ 200	η_wh ≥ 213
A⁺⁺	53 ≤ η_wh < 62	53 ≤ η_wh < 62	61 ≤ η_wh < 69	72 ≤ η_wh < 90	130 ≤ η_wh < 163	150 ≤ η_wh < 188	160 ≤ η_wh < 200	170 ≤ η_wh < 213
A⁺	44 ≤ η_wh < 53	44 ≤ η_wh < 53	53 ≤ η_wh < 61	55 ≤ η_wh < 72	100 ≤ η_wh < 130	115 ≤ η_wh < 150	123 ≤ η_wh < 160	131 ≤ η_wh < 170
A	35 ≤ η_wh < 44	35 ≤ η_wh < 44	38 ≤ η_wh < 53	38 ≤ η_wh < 55	65 ≤ η_wh < 100	75 ≤ η_wh < 115	80 ≤ η_wh < 123	85 ≤ η_wh < 131
B	32 ≤ η_wh < 35	32 ≤ η_wh < 35	35 ≤ η_wh < 38	35 ≤ η_wh < 38	39 ≤ η_wh < 65	50 ≤ η_wh < 75	55 ≤ η_wh < 80	60 ≤ η_wh < 85
C	29 ≤ η_wh < 32	29 ≤ η_wh < 32	32 ≤ η_wh < 35	32 ≤ η_wh < 35	36 ≤ η_wh < 39	37 ≤ η_wh < 50	38 ≤ η_wh < 55	40 ≤ η_wh < 60
D	26 ≤ η_wh < 29	26 ≤ η_wh < 29	29 ≤ η_wh < 32	29 ≤ η_wh < 32	33 ≤ η_wh < 36	34 ≤ η_wh < 37	35 ≤ η_wh < 38	36 ≤ η_wh < 40
E	22 ≤ η_wh < 26	23 ≤ η_wh < 26	26 ≤ η_wh < 29	26 ≤ η_wh < 29	30 ≤ η_wh < 33	30 ≤ η_wh < 34	30 ≤ η_wh < 35	32 ≤ η_wh < 36
F	19 ≤ η_wh < 22	20 ≤ η_wh < 23	23 ≤ η_wh < 26	23 ≤ η_wh < 26	27 ≤ η_wh < 30	27 ≤ η_wh < 30	27 ≤ η_wh < 30	28 ≤ η_wh < 32
G	η_wh < 19	η_wh < 20	η_wh < 23	η_wh < 23	η_wh < 27	η_wh < 27	η_wh < 27	η_wh < 28

3.ENERGY EFFICIENCY CLASSES OF SOLAR HOT WATER STORAGE TANKS, IF (PART OF) A SOLAR DEVICE

The energy efficiency class of a solar hot water storage tank, if (part of) a solar device, shall be determined on the basis of its standing loss as set out in Table 4.

Table 4Energy efficiency classes of solar hot water storage tanks, if (part of) a solar device

Energy efficiency class	Standing loss S in Watts, with storage volume V in litres
A+	$S < 5,5 + 3,16 \times V^{0,4}$
A	$5,5 + 3,16 \times V^{0,4} \leq S < 8,5 + 4,25 \times V^{0,4}$
B	$8,5 + 4,25 \times V^{0,4} \leq S < 12 + 5,93 \times V^{0,4}$
C	$12 + 5,93 \times V^{0,4} \leq S < 16,66 + 8,33 \times V^{0,4}$
D	$16,66 + 8,33 \times V^{0,4} \leq S < 21 + 10,33 \times V^{0,4}$
E	$21 + 10,33 \times V^{0,4} \leq S < 26 + 13,66 \times V^{0,4}$
F	$26 + 13,66 \times V^{0,4} \leq S < 31 + 16,66 \times V^{0,4}$
G	$S > 31 + 16,66 \times V^{0,4}$