The Energy Information (Household Air Conditioners) Regulations 2003

2.  The heating mode energy efficiency class shall be determined in accordance with the following Tables, where COP (coefficient of performance) is determined in accordance with the test procedures of the harmonised standards at conditions T1 + 7C.

(1) Air-cooled air conditioners – heating mode

Table 3

(a) split and multi-split appliances

Energy efficiency class	Coefficient of performance
A	3.60 < COP
B	3.60 ≥ COP > 3.40
C	3.40 ≥ COP > 3.20
D	3.20 ≥ COP > 2.80
E	2.80 ≥ COP > 2.60
F	2.60 ≥ COP > 2.40
G	2.40 ≥ COP

(b) Packaged ‘double ducts’ units^*

Energy efficiency class	Coefficient of performance
* Packaged ‘double ducts’ units, defined as ‘Air conditioner completely enclosed inside the conditioned space, with the condenser air intake and discharge connected to the outside by means of two ducts’, will be classified according to Table 3(b) with a correction factor of −0.4.
A	3.40 < COP
B	3.40 ≥ COP > 3.20
C	3.20 ≥ COP > 3.00
D	3.00 ≥ COP > 2.60
E	2.60 ≥ COP > 2.40
F	2.40 ≥ COP > 2.20
G	2.20 ≥ COP

(c) single duct units

Energy efficiency class	Coefficient of performance
A	3.00 < COP
B	3.00 ≥ COP > 2.80
C	2.80 ≥ COP > 2.60
D	2.60 ≥ COP > 2.40
E	2.40 ≥ COP > 2.10
F	2.10 ≥ COP > 1.80
G	1.80 ≥ COP

(2) Water-cooled air conditioners - heating mode

Table 4

(a) split and multi-split appliances

Energy efficiency class	Coefficient of performance
A	4.00 < COP
B	4.00 ≥ COP > 3.70
C	3.70 ≥ COP > 3.40
D	3.40 ≥ COP > 3.10
E	3.10 ≥ COP > 2.80
F	2.80 ≥ COP > 2.50
G	2.50 ≥ COP

(b) packaged appliances

Energy efficiency class	Energy efficiency ratio
A	4.70 < COP
B	4.70 ≥ COP > 4.40
C	4.40 ≥ COP > 4.10
D	4.10 ≥ COP > 3.80
E	3.80 ≥ COP > 3.50
F	3.50 ≥ COP > 3.20
G	3.20 ≥ COP