Comparison numbers

28 Products researched
10 Research hours
320 Readers
17,394 Customer ratings

Best Small Flow Heaters

Mini Water Heater Comparison 2025

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Best Product
Stiebel Eltron DNM 3
Stiebel Eltron DNM 3
Amazon
Bestseller
AEG MTD 350
AEG MTD 350
Amazon
Best Price
Haofy small flow heater
Haofy small flow heater
Amazon
EUNEWR small flow heater
EUNEWR small flow heater
Amazon
Stiebel Eltron DEM 3
Stiebel Eltron DEM 3
Amazon
Haofy mini water heater
Haofy mini water heater
Amazon
Customer rating (from Amazon)
Deal
Available at
Manufacturer
General features
Dimensions
Colour
Weight
Product properties
Drive type
Power
Water connection
KNX capable
Voltage
Display
Manual
Advantages
Disadvantages
Shipping (Amazon)
Best Product
Best Product
AmazonStiebel Eltron DNM 3
Rating
Excellent01/2025

1

Stiebel Eltron DNM 3
Customer rating
Amazon1,309 reviews
Check Price
Deal
Available at
153,09 £
see vendordays
see vendordays
Manufacturer
Stiebel Eltron
General features
Dimensions
3,2 x 5,6 x 7,5 in
Colour
White
Weight
3,1 lb
Product properties
Drive type
Electric
Power
0 kW
Water connection
3/8 Inches
KNX capable
Voltage
230 V
Display
Manual
Advantages
  • Manual offers an answer to everything
Disadvantages
  • Not KNX-compatible
Shipping (Amazon)
see vendor
Check Price
Bestseller
Bestseller
AmazonAEG MTD 350
Rating
Very Good05/2025

2

AEG MTD 350
Customer rating
Amazon191 reviews
Check Price
Deal
Available at
244,29 £
see vendordays
see vendordays
Manufacturer
AEG
General features
Dimensions
3,2 x 5,6 x 7,5 in
Colour
White
Weight
3,1 lb
Product properties
Drive type
Electricity
Power
3,5 kW
Water connection
3/8 Inches
KNX capable
Voltage
230 V
Display
Manual
Advantages
  • Questions can be answered in the manual
Disadvantages
  • Not KNX-compatible
Shipping (Amazon)
see vendor
Check Price
Best Price
Best Price
AmazonHaofy small flow heater
Rating
Very Good05/2025

3

Haofy small flow heater
Customer rating
Amazon102 reviews
Check Price
Deal
price
48,03 £
instead of 67,45 £
Available at
48,03 £
see vendordays
44,77 £
see vendordays00£
60,03 £
8 daysdays00£
Manufacturer
General features
Dimensions
Colour
White
Weight
2,6 lb
Product properties
Drive type
Electric
Power
3 kW
Water connection
KNX capable
Voltage
Display
Manual
Advantages
  • With integrated display
Disadvantages
Shipping (Amazon)
8 days
Check Price
AmazonEUNEWR small flow heater
Rating
Very Good01/2025

4

EUNEWR small flow heater
Customer rating
Amazon91 reviews
Check Price
Deal
Available at
55,99 £
see vendordays00£
see vendordays
Manufacturer
General features
Dimensions
5,5 x 6,3 x 9,3 in
Colour
White
Weight
2,4 lb
Product properties
Drive type
Electricity, Electric
Power
3 kW
Water connection
KNX capable
Voltage
Display
Manual
Advantages
Disadvantages
Shipping (Amazon)
see vendor
Check Price
AmazonStiebel Eltron DEM 3
Rating
Very Good01/2025

5

Stiebel Eltron DEM 3
Customer rating
Amazon7 reviews
Check Price
Deal
Available at
285,80 £
see vendordays00£
see vendordays
Manufacturer
Stiebel Eltron
General features
Dimensions
3,2 x 5,6 x 7,5 in
Colour
White
Weight
3,7 lb
Product properties
Drive type
Electricity
Power
3,5 kW
Water connection
3/8 Inches
KNX capable
Voltage
230 V
Display
Manual
Advantages
  • Solar-compatible model
  • Scald protection included
  • Questions can be answered in the manual
Disadvantages
  • Unsuitable for KNX
Shipping (Amazon)
see vendor
Check Price
AmazonHaofy mini water heater
Rating
Very Good01/2025

6

Haofy mini water heater
Customer rating
Amazon61 reviews
Check Price
Deal
Available at
48,79 £
see vendordays
see vendordays
Manufacturer
General features
Dimensions
4,1 x 4,1 x 7,9 in
Colour
Black
Weight
2,4 lb
Product properties
Drive type
Electric
Power
3 kW
Water connection
KNX capable
Voltage
Display
Manual
Advantages
  • Display available
Disadvantages
Shipping (Amazon)
see vendor
Check Price
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