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Best Instant Water Heaters

Tankless Water Heater Comparison 2026

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Best Product
Stiebel Eltron DCE 11/13
Stiebel Eltron DCE 11/13
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Amazon
Bestseller
ecosmart ECO 11
ecosmart ECO 11
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Amazon
AEG DDLE FB 11/13
AEG DDLE FB 11/13
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Amazon
AEG DDLE Basis 18/21/24
AEG DDLE Basis 18/21/24
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Amazon
Stiebel Eltron DNM 3
Stiebel Eltron DNM 3
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Amazon
TTulpe Indoor B-6
TTulpe Indoor B-6
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Amazon
Best Price
thermomate ELEX5.5
thermomate ELEX5.5
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Amazon
Our Ratings
Model
Customer Ratings
Seller
Available From
Manufacturer
Material
Dimensions
Colour
Weight
Remote control
Drive type
Temperature range
Scald protection
Energy efficiency class
Power
Water connection
KNX capable
Voltage
Gas pressure
Display
Advantages
Disadvantages
1
Best Product
Stiebel Eltron DCE 11/13
Vergleichsergebnis
Rating
Excellent
05 / 2026
Model
Stiebel Eltron DCE 11/13
Bewertung
627 Reviews
Zum Anbieter
Amazon
Available at
amazon
£214.70
eBay
Check Price
Manufacturer
Stiebel Eltron
Material
Plastic
Dimensions
3,3 x 7,4 x 11,5 in
Colour
White
Weight
5,5 lb
Remote control
Drive type
Electric, Manually, Alternating current
Temperature range
20 to 60 °C
Scald protection
Energy efficiency class
A
Power
13,5 kW
Water connection
3/8 Inches
KNX capable
Voltage
400 V
Gas pressure
10000 mbar
Display
Advantages
  • Scald protection included
  • Questions can be answered in the manual
Disadvantages
  • Not suitable for KNX
2
Bestseller
ecosmart ECO 11
Vergleichsergebnis
Rating
Excellent
05 / 2026
Model
ecosmart ECO 11
Bewertung
5637 Reviews
Zum Anbieter
Amazon
Available at
amazon
£273.77
eBay
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Manufacturer
ecosmart
Material
Dimensions
3,7 x 8 x 11,5 in
Colour
White
Weight
6,4 lb
Remote control
Drive type
Electricity
Temperature range
26 to 60 °C
Scald protection
Energy efficiency class
Power
13 kW
Water connection
KNX capable
Voltage
240 V
Gas pressure
Display
Advantages
  • Has a display
Disadvantages
3
AEG DDLE FB 11/13
Vergleichsergebnis
Rating
Excellent
05 / 2026
Model
AEG DDLE FB 11/13
Bewertung
228 Reviews
Zum Anbieter
Amazon
Available at
amazon
£270.84
eBay
Check Price
Manufacturer
AEG
Material
Metal, Plastic
Dimensions
3,4 x 6,9 x 11,5 in
Colour
White
Weight
5,5 lb
Remote control
Drive type
Electric, Manually, Alternating current
Temperature range
20 to 60 °C
Scald protection
Energy efficiency class
A
Power
13,5 kW
Water connection
1/2 Inches
KNX capable
Voltage
400 V
Gas pressure
10000 mbar
Display
Advantages
  • Easy setup via the extensive manual
  • Is solar-compatible
  • Can also be operated with a remote control
  • Integrated scald protection
  • Has a practical direct tap
  • Display available
Disadvantages
  • Not suitable for KNX
4
AEG DDLE Basis 18/21/24
Vergleichsergebnis
Rating
Excellent
05 / 2026
Model
AEG DDLE Basis 18/21/24
Bewertung
463 Reviews
Zum Anbieter
Amazon
Available at
amazon
£245.63
eBay
Check Price
Manufacturer
AEG
Material
Plastic
Dimensions
3,7 x 8,9 x 19,1 in
Colour
White
Weight
7,9 lb
Remote control
Drive type
Electric, Gas, Manually, Alternating current
Temperature range
30 to 60 °C
Scald protection
Energy efficiency class
A
Power
24 kW
Water connection
1/2 Inches
KNX capable
Voltage
400 V
Gas pressure
10000 mbar
Display
Advantages
  • Solar-compatible model
  • Has a practical direct tap
  • With integrated display
Disadvantages
  • Not suitable for KNX
5
Stiebel Eltron DNM 3
Vergleichsergebnis
Rating
Excellent
05 / 2026
Model
Stiebel Eltron DNM 3
Bewertung
1435 Reviews
Zum Anbieter
Amazon
Available at
amazon
£163.23
eBay
Check Price
Manufacturer
Stiebel Eltron
Material
Plastic
Dimensions
32,3 x 55,9 x 75,2 in
Colour
White
Weight
3,1 lb
Remote control
Drive type
Electric, Manually, Electricity
Temperature range
Scald protection
Energy efficiency class
A
Power
0 kW
Water connection
3/8 Inches
KNX capable
Voltage
230 V
Gas pressure
1000 mbar
Display
Advantages
  • Has a display
Disadvantages
  • Unsuitable for KNX
6
TTulpe Indoor B-6
Vergleichsergebnis
Rating
Very Good
05 / 2026
Model
TTulpe Indoor B-6
Bewertung
103 Reviews
Zum Anbieter
Amazon
Available at
amazon
£260.00
eBay
Check Price
Manomano.co.uk
£299.00
Manufacturer
TTulpe
Material
Plastic
Dimensions
96,9 x 100,8 x 100,8 in
Colour
White
Weight
22 lb
Remote control
Drive type
Gas
Temperature range
Scald protection
Energy efficiency class
A+
Power
11,6 kW
Water connection
KNX capable
Voltage
1,5 V
Gas pressure
0 mbar
Display
Advantages
  • Manual offers an answer to everything
Disadvantages
7
Best Price
thermomate ELEX5.5
Vergleichsergebnis
Rating
Very Good
05 / 2026
Model
thermomate ELEX5.5
Bewertung
94 Reviews
Zum Anbieter
Amazon
Available at
amazon
£119.99
eBay
Check Price
Manufacturer
thermomate
Material
Plastic
Dimensions
3,7 x 6,5 x 7,5 in
Colour
White
Weight
3,7 lb
Remote control
Drive type
Electric
Temperature range
35 to 55 °C
Scald protection
Energy efficiency class
A
Power
5,5 kW
Water connection
KNX capable
Voltage
230 V
Gas pressure
Display
Advantages
  • Questions can be answered in the manual
  • Display available
  • With scald protection
Disadvantages