Specific resistance ρ
≥
15
(at ϑcold ≤25 °C)
Specific conductivity σ
≤
μS/cm
15
(at ϑcold ≤25 °C)
Specific conductivity σ
≤
μS/cm
15
(at ϑcold >25 °C)
Specific resistance ρ
≥
15
(at ϑcold >25 °C)
Application limits
Max. throughput
Max. permissible pressure
Values
Max. permissible inlet tem-
perature
ON
Pressure drop at flow rate
Flow rate for pressure drop
Flow rate limit at
DHW delivery
Δϑ at DHW delivery
Hydraulic data
Rated capacity
Versions
Oversink installation
Undersink installation
Open vented type
Protection class
Insulation block
Heating system heat ge-
nerator
Cap and back panel
MTH 350
Ω cm
1100
909
909
Ω cm
1100
l/min
2.3
MPa
0
°C
35
l/min
>1.6
MPa
0.05
l/min
1.6
l/min
2.2
l/min
2.0
K
25
l
0.1
X
X
X
1
Plastic
Bare wire
Plastic
MTH 440
MTH 570
1100
1100
909
909
909
909
1100
1100
2.7
3.5
0
0
35
35
>2.0
>2.6
0.06
0.08
2.0
2.6
2.8
4.3
2.5
3.2
25
25
0.1
0.1
X
X
X
X
X
X
1
1
Plastic
Plastic
Bare wire
Bare wire
Plastic
Plastic
MTH 350 UTE
MTH 350 UT
1100
1100
909
909
909
909
1100
1100
2.3
2.3
0
35
35
>1.6
>1.6
0.05
0.05
1.6
1.6
2.2
2.2
2.0
2.0
25
25
0.1
0.1
X
X
X
1
Plastic
Plastic
Bare wire
Bare wire
Plastic
Plastic
Installation
MTH 350 OT
1100
909
909
1100
0
0
35
25
0.1
X
X
X
X
X
X
1
1
Plastic
Bare wire
Plastic
39