Clas ONE Datasheet
CLAS ONE
/ XTRATECH™ stainless steel heat exchanger
/ High domestic hot water flow rates
/ 'Auto' function technology
/ Comfort function
/ High efficiency pump
/ 1:7 modulation
/ Quiet operation starting at 49dB
/ Lightweight unit starting at 29kg
/ 8 year warranty
/ 'A' ErP rated for optimum energy efficiency
/ Large backlit display
/ Includes LPG conversion kit
/ Ariston NET compatible
The lightweight Clas ONE comes complete
with an 8 year warranty and a range of high-
end features including a large backlit display,
an energy saving 'Auto' function and easy-to-
use backlit display.
KEY
A \ Central heating flow
B \ Domestic hot water outlet
C \ Gas inlet
D \ Domestic cold water inlet
E \ Central heating return
TECHNICAL DATA
Product Codes 330104533010443301043
3024 38
Efficiency
ERP rating - heating/DHW
ERP data - seasonal space heating efficiency
ERP data - water heating energy efficiency
ERP data - noise level
ERP data - tapping profile
SEDBUK rating
SAP efficiency 2005
SAP efficiency 2009/2012
Rating
%
%
dB
-
Band
%
%
A/A
94
82
51
XL
A
90.2
89.4
A/A
94
83
49
XL
A
90
89.4
A/A
94
85
52
XXL
A
90
89.4
Power & Performance
DHW flow rate ∆T @ 35ºC
Heat output max (CH)
Heat output max (DHW)
Min/Max heating temperature (high temp. range)
Min/Max heating temperature (low temp. range)
DHW temperature min/max
l/min
kW
kW
°C
°C
°C
12.5
28
30
35/82
20/45
36/60
10.4
22
26
35/82
20/45
36/60
15.5
31
38
35/82
20/45
36/60
Characteristics
Minimum ambient temperature
DHW minimum flow rate
DHW pressure - min/max
Built-in expansion vessel capacity
Servicing clearances - top/front/bottom
Servicing clearances - left/right
Weight
NOx
°C
l/min
bar
I
mm
mm
kg
mg/kWh
5
2
0.2/7.0
8
300/450/250
5/5
32.3
51
5
2
0.2/7.0
8
300/450/250
5/5
29.7
53
5
2
0.2/7.0
8
300/450/250
5/5
33.4
55
Electrical Data
Electrical supply
Protection grade of electrical system
V/Hz
IP
230/50
X5D
230/50
X5D
230/50
X5D
ENERGY RATING
A
A
PERFORMANCE
CERTIFIED BY
TÜV RHEINLAND
GROUP
XtraTech™
stainless-steel heat exchanger
EASY
MAINTENANCE
EASY
INSTALLATION
SYSTEM
MANAGEMENT
AUTO
FUNCTION
ITALIAN
DESIGN
EASY
TO USE
SUPER
SILENT
150
315 (Mod. 24)
385 (Mod. 30/38)
180
25745
ARISTON NET
COMPATIBLE