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2
TECHNICAL DATA
PERFORMANCE - NATURAL GAS (CAT: I2H 2H - G20 - 20 mbar)
2.1
Alpha CD25C
Central Heating
Heat Input (H
)
s
(Gross)
Heat Input (H
)
i
(Net)
Heat Output (H
condensing)
s
(50°C/30°C)
Heat Output (H
non-condensing) kW
i
(80°C/60°C)
Differential Burner
Room sealed
chamber panel
Pressure
fitted
Gas Rate
Alpha CD28C
Central Heating
Heat Input (H
)
s
(Gross)
Heat Input (H
)
i
(Net)
Heat Output (H
condensing)
s
(50°C/30°C)
Heat Output (H
non-condensing) kW
i
(80°C/60°C)
Differential Burner
Room sealed
chamber panel
Pressure
fitted
Gas Rate
Alpha CD35C
Central Heating
Heat Input (H
)
s
(Gross)
Heat Input (H
)
i
(Net)
Heat Output (H
condensing)
s
(50°C/30°C)
Heat Output (H
non-condensing) kW
i
(80°C/60°C)
Differential Burner
Room sealed
chamber panel
Pressure
fitted
Gas Rate
Note: The above appliances are fully modulating and are not range rated.
MAX.
MIN.
kW
20.4
6.4
Btu/h
69 600
21 960
kW
18.4
5.8
Btu/h
62 780
19 780
kW
19.5
6.1
Btu/h
66 550
20 820
18.0
5.5
Btu/h
61 420
18 780
mbar
2.82
0.40
in wg
1.13
0.16
m³/h
1.94
0.61
ft³/h
68.5
21.5
MAX.
MIN.
kW
27.1
7.3
Btu/h
92 400
24 900
kW
24.4
6.6
Btu/h
83 250
21 500
kW
25.9
6.9
Btu/h
88 400
23 500
24.0
6.3
Btu/h
81 900
21 500
mbar
5.73
0.52
in wg
2.29
0.21
m³/h
2.59
0.70
ft³/h
91.4
24.7
MAX.
MIN.
kW
31.6
8.9
Btu/h
107 800
30 600
kW
28.5
8.1
Btu/h
97 200
27 600
kW
30.3
8.5
Btu/h
103 400
29 000
28.0
7.8
Btu/h
95 550
26 600
mbar
2.01
0.25
in wg
0.80
0.10
m³/h
3.02
0.86
ft³/h
106.6
30.4
Alpha CD25C
Domestic Hot Water
Heat Input (H
)
s
(Gross)
Heat Input (H
)
i
(Net)
Output to Water (H
)
s
(modulating)
Differential Burner
Room sealed
chamber panel
Pressure
fitted
Gas Rate
Flow Rate at 35°C Rise
Specific Flow Rate (D) at 30°C Rise L/min
(Flow rate @ 30K to EN625)
Alpha CD28C
Domestic Hot Water
Heat Input (H
)
s
(Gross)
Heat Input (H
)
i
(Net)
Output to Water (H
)
s
(modulating)
Differential Burner
Room sealed
chamber panel
Pressure
fitted
Gas Rate
Flow Rate at 35°C Rise
Specific Flow Rate (D) at 30°C Rise L/min
(Flow rate @ 30K to EN625)
Alpha CD35C
Domestic Hot Water
Heat Input (H
)
s
(Gross)
Heat Input (H
)
i
(Net)
Output to Water (H
)
s
(modulating)
Differential Burner
Room sealed
chamber panel
Pressure
fitted
Gas Rate
Flow Rate at 35°C Rise
Specific Flow Rate (D) at 30°C Rise L/min
(Flow rate @ 30K to EN625)
Alpha CD25C/28C/35C - Technical Data
MAX.
MIN.
kW
26.7
6.4
Btu/h
91 100
21 960
kW
24.1
5.8
Btu/h
82 200
19 780
kW
24.3
5.5
Btu/h
84 800
18 780
mbar
5.49
0.40
in wg
2.20
0.16
m³/h
2.55
0.61
ft³/h
90.0
21.5
L/min
9.6
gal/min
2.2
11.2
gal/min
2.5
MAX.
MIN.
kW
31.6
7.3
Btu/h
107 900
24 900
kW
28.5
6.6
Btu/h
97 200
22 500
kW
28.7
6.3
Btu/h
97 900
21 500
mbar
7.47
0.52
in wg
2.98
0.21
m³/h
3.02
0.70
ft³/h
106.6
24.7
L/min
11.4
gal/min
2.5
13.3
gal/min
2.9
MAX.
MIN.
kW
38.0
8.9
Btu/h
129 600
30 600
kW
34.3
8.1
Btu/h
117 000
27 600
kW
34.6
8.0
Btu/h
118 100
27 300
mbar
3.07
0.25
in wg
1.23
0.10
m³/h
3.64
0.86
ft³/h
128.5
30.4
L/min
14.2
gal/min
3.13
15.6
gal/min
3.44
3
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