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Best 5l Boiler - Holiday Sale

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Last Updated - 18.12.2025

Best Choice

01

Stiebel Eltron

Stiebel Eltron DHM3 Mini Unvented Instantaneous Water Heater

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9.7

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Temperature increase of the water by 25 degrees: the outlet temperature at the tap depends on the cold water inlet in the building. Hot water flow rate: max. 2.0 l/min
Installation: under-sink wall mounting only. Earthing contact plug 230 V
Fitting: for pressure-resistant (recognizable on the 2 connection hoses) and pressureless fitting (recognizable by the 3 connection hoses)
Efficient: Includes special aerator (included) for pleasantly soft water jet. Saves water and energy without sacrificing comfort
Country approval: Germany, Austria
Box contents: Stiebel Eltron DHM 3 tankless water heater, special aerator, connection hose 3/8, strainer, operating and installation instructions, T-piece 3/8
Areas of use: instantaneous water heater with plug for hand washbasins in the guest toilet. Immediately lukewarm water (approx. 35°C). Not suitable for kitchen and bathroom - a Stiebel Eltron small storage tank or instantaneous water heater from 11 kW is required

169,00 €
02

Stiebel Eltron

Latest generation: Stiebel Eltron small storage tank SNU 5 Plus, very compact, anti-drop, thermostop function, under-sink boiler 5 litres, low pressure with plug, 2 kW, 204972

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9.6

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Space-saving miracle: for more space under the kitchen sink
Safety: integrated anti-scald protection; 4-stage temperature limitation
Fitting + installation: low-pressure tap required – use of a pressure tap not allowed; only vertical under sink mounting; ready for plug: 230 V; easy wall mounting thanks to universal mounting strip; easy replacement of previous models
Energy-saving miracle: the most compact of its kind with the lowest power consumption; the energy-saving thermostop function prevents the tap from heating up
Country approval: Germany, Austria, Czech Republic
Comfort features: continuous temperature setting via high-quality rotary selector with tactile detent
Box contents: Stiebel Eltron small storage unit SNU 5 Plus, operating and installation instructions, wall hanging
Areas of use: pressureless boiler for the sink in the bathroom or the sink in the kitchen

155,55 €
03

AEG

AEG Electric Water Heaters with Small Storage Tank, white, 222162

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9.5

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Safe: tested safety by VDE testing institute, frost protection position
Please note: use only with low pressure/pressureless fittings, recognizable on the 3 connection hoses, do not use a hose shower fitting
Made in Germany
High hot water comfort for a water point: immediately hot water in the kitchen and bathroom
Economical and efficient: high-quality thermal insulation, low standby consumption, energy saving setting, energy efficiency class A
Easy temperature selection: stepless from 35-85°C, temperature selection limitation possible to 45/55/65°C
Easy installation: ready to plug, under-sink mounting

74,99 €
Value for Money

04

AEG

AEG Boiler BOI 5 U, Under-Sink Boiler 5 Litres Low Pressure with Plug 230 V for Kitchen Sink and Wax Basin, 2 kW, Made in Germany, 204616

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9.4

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Safety and quality: child lock thanks to adjustable temperature limit/scald protection; tested safety by VDE testing institute, frost protection, made in Germany
Installation: easy installation, with plug (socket and cold water connection sufficient), under-sink mounting
Energy-saving functions: high quality thermal insulation, low standby consumption, energy efficiency class A
Comfortable operation: selectable desired temperature, infinitely adjustable from 35 to 85 °C
Box contents: a AEG small storage, operating and installation instructions (English language not guaranteed), wall hanging
Areas of use: open boiler 5 l under-sink for a water point in the kitchen and bathroom; Warning: use only with low pressure/pressureless tap – recognizable on the 3 connection hoses – hose shower fitting is only to be used with kink protection

69,90 €
05

Vaillant

Vaillant 10021140 Electric Hot Water Tank VEN 5/7-5 U plus

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9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Scald protection can be activated.
No need to change the wall mounting rail.
Low pressure under-table wall storage.
Frost protection.
Adjustable thermostat from 7°C to 85°C.

88,50 €
06

Thermoflow

Thermoflow top/under-sink storage

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9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Mounting: the hot water boiler with G 3/8 inch connection can be mounted on a wall. With a dimensions of 42 (H) x 27 (W) x 18 (D) cm, the 5 litre small storage tank can be mounted
Hot water storage: the ready-to-plug electric hot water tank, with automatic frost protection, has a storage volume of 5 litres and can be mounted as a hot water under sink device
Energy-saving: thanks to the energy-saving mode and energy efficiency class A, the Thermoflow UT5 under-sink boiler allows efficient water heating with an annual power consumption of 490 kWh
Box contents: the Thermoflow UT5 low pressure boiler comes ready for plug, including instruction manual (English language not guaranteed). A low-pressure fitting is mandatory for commissioning the small reservoir
Areas of use: with a heating time of 10 minutes. From 10 °C to 65 °C, the 5 litre under-sink unit ensures pleasantly tempered water and is suitable as a boiler in the kitchen or bathroom

43,46 €
07

Thermoflow

Thermoflow top/under-sink storage

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8.8

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Mounting: the hot water boiler with G 1/2 inch connection can be mounted on a wall. With a dimensions of 42 (H) x 27 (W) x 18 (D) cm, the 5 litre small storage tank can be mounted
Hot water storage: the electric hot water tank, with automatic frost protection, has a storage volume of 5 litres and is suitable as a hot water boiler for overtable installations
Energy-saving: thanks to the energy-saving mode and energy efficiency class A, the Thermoflow OT5 top table boiler allows efficient water heating with an annual power consumption of 490 kWh
Box contents: the Thermoflow OT5 low pressure boiler comes ready for plug, including instruction manual (English language not guaranteed). A low-pressure fitting is mandatory for commissioning the small reservoir
Areas of use: with a heating time of 10 minutes. From 10 °C to 65 °C, the overtable boiler ensures pleasantly tempered water and is suitable as a small boiler in the kitchen or bathroom

59,99 €
08

Stiebel Eltron

Newest generation Stiebel Eltron boiler UFP 5 Trend with thermostop function, very compact, under-sink boiler 5 litres low pressure, with plug 230 V, 2 kW, made in Germany, 204966

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8.6

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Space-saving miracle: for more space under the kitchen sink
Safety: integrated anti-scald protection; 4-stage temperature limitation
Fitting + installation: low-pressure tap required – use of a pressure tap not allowed; only vertical under sink mounting; ready for plug: 230 V; easy wall mounting thanks to universal mounting strip; easy replacement of previous models
Energy-saving: the most compact of its kind with the lowest power consumption; the energy-saving thermostop function prevents unwanted heating of the fitting
Country approval: Germany, Austria, Poland
Comfort features: continuous temperature setting via high-quality rotary selector with tactile detent
Box contents: Stiebel Eltron small storage tank UFP 5 Trend, operating and installation instructions, wall hanging
Areas of use: pressureless boiler for the sink in the bathroom or the sink in the kitchen

103,70 €
09

Thermoflow

Thermoflow DS 5U Under-Sink Storage / Low Pressure Storage / Hot Water Boiler 5 L Storage Volume / G 1/2 Inch Connection / 30-65 °C / Suitable for Low Pressure Fittings / with Metal Tank / Energy

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8.4

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Mounting: The hot water boiler with G 1/2 inch connection can be mounted on a wall. With a dimension of 32.8 (H) x 23.4 (W) x 22.7 (D) cm, the 5 litre small storage tank can be installed to save space. Suitable for low pressure fittings. The metal tank also allows for pressure-resistant installation.
Hot water storage: the ready-to-plug electric hot water tank has a storage volume of 5 litres and can be mounted as a hot water undersink device. The integrated metal tank ensures high durability and stability.
Energy-saving: thanks to the energy-saving mode and energy efficiency class B, the Thermoflow DS 5U under-sink boiler allows efficient water heating with an annual power consumption of 563.4 kWh
Box contents: the Thermoflow DS 5U boiler comes ready to plug in with instruction manual. Before starting up the small tank, the device must be filled with cold water.
Areas of use: with a heating time of 14 minutes. from 10 °C to 65 °C, the 5-litre under-sink unit ensures pleasantly tempered water and is suitable as a boiler in the kitchen or sink. Suitable for low pressure fittings - ideal for single dispensing points.

95,75 €
10

Vaillant

Vaillant eloSTOR VEN 5/7-7 U Exclusive 0010021138 Hot Water Tank, Under-Sink Device, 230 V, Capacity: 5 Litres, Low Pressure Accumulator, Small Electric Tank,

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8.3

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Highly efficient - The hot water tank has efficient thermal insulation and frost protection for unheated rooms
High ease of use – with 5 litre capacity and infinitely adjustable temperature controller, the under-sink storage ensures instant hot water supply without waiting time
Energy saving (ECO) – the small storage unit offers economy and comfort thanks to the continuous temperature setting, low standby energy consumption and the eco position
Comfortable hot water supply – the DropSafe protection function prevents dripping of hot water and the ThermoSafe function minimises heat loss via the storage tap
Box contents: Vaillant eloSTOR VEN 5/7-7 U exclusive under-sink hot water tank, dimensions (H x W x D): 40 cm x 24 cm x 23.2 cm, item number: 0010021138

130,51 €