Benchmark Alpha E-Tec Plus 28 - Page 55

Seasonal space heating energy efciency of boiler
1
%
Temperature control
From che of temperature
control
Supplementary boiler
From che of boiler
Supplementary heat pump
From che of heat pump
Solar contribution AND Supplementary heat pump
Select smaller value
Boiler and supplementary heat pump installed with low temperature heat emitters at 35°C?
From che of heat pump
The energy efciency of the package of products provided for in this che may not correspond to its
actual energy efciency once installed in a building, as the efciency is inuenced by further factors
such as heat loss in the distribution system and the dimensioning of the products in relation to building
size and characteristics.
Seasonal space heating energy efciency of package
Seasonal space heating energy efciency class of package
Solar contribution
From che of solar device
Class I = 1 %, Class II = 2 %,
Class III = 1.5 %, Class IV = 2 %,
Class V = 3 %, Class VI = 4 %,
Class VII = 3.5 %, Class VIII = 5 %
2
%
+
3
%
±
Seasonal space heating energy afciency
(in %)
( - ‘I’ ) x 0,1 =
( - ‘I’ ) x ‘II’ =
0.5 x O 0.5 x =
+ ( 50 x ‘II’ ) =
4
5
6
7
4 5
%
%
%
%
+
+
-
Collector size
(in m
2
)
Tank volume
(in m
3
)
Collector efciency
(in %)
Tank rating
A* = 0.95, A = 0.91
B = 0.86, C = 0.83
D-G = 0.81
( ‘III’ x + ‘IV’ x ) x (0.9 x ( / 100) x =
Seasonal space heating energy afciency
(in %)
G F E D C B A A
+++
A
++
A
+
< 30 % ≥ 30 % ≥ 34 % ≥ 36 % ≥ 75 % ≥ 82 % ≥ 90 % ≥ 98 % ≥ 125 %≥ 150 %
%
7
‘I’
12.3 FACSIMILE FOR FILLING IN ROOM HEATING SYSTEM ASSEMBLY CHART
Alpha E-Tec Plus 28, 33 and 38 - Energy Classification
55