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10 bestCostco Water Heaterof December 2025

112M consumers helped this year.

1

Ariston VELIS EVO 45 L Electric Storage Water Heater, Inclusive Of Unvented Kit. Manufactured to be installed in UK.
Ariston VELIS EVO 45 L Electric Storage Water Heater, Inclusive Of Unvented Kit. Manufactured to be installed in UK.

Ariston

9.9

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2

Stiebel Eltron DCE-S 6/8 Plus Compact Instant Water Heater, Suitable for Showers, Precise Temperature Selection from 20 °C to 60 °C, 238153, 220240 V, White, kW
Stiebel Eltron DCE-S 6/8 Plus Compact Instant Water Heater, Suitable for Showers, Precise Temperature Selection from 20 °C to 60 °C, 238153, 220240 V, White, kW

Stiebel Eltron

9.8

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3

Ariston PRO1 ECO 100 L Electric Storage Water Heater, Inclusive Of Unvented Kit, B class ErP Rating, WaterPlus Tecnology, Titanshield Tecnology, Manufactured to be installed in UK - 3820021.
Ariston PRO1 ECO 100 L Electric Storage Water Heater, Inclusive Of Unvented Kit, B class ErP Rating, WaterPlus Tecnology, Titanshield Tecnology, Manufactured to be installed in UK - 3820021.

Ariston

9.6

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4

Vinabuks Electric Water Heater ， 2.5kw 240v Instant Water Heater 2.5kw 240v 3.0 Gallon on Demand Water Heater with Digital Temperature Control,Smart Control Point of Use (Upper- 11L)
Vinabuks Electric Water Heater ， 2.5kw 240v Instant Water Heater 2.5kw 240v 3.0 Gallon on Demand Water Heater with Digital Temperature Control,Smart Control Point of Use (Upper- 11L)

VINABUKS

9.3

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5

CAMPLUX 5L Gas Water Heater with 4.3L Water Pump, Freestanding Tankless Water Heater, AY132Max Instant LPG Water Boiler with Carrying Bag, for Camping/Outdoor Showers
CAMPLUX 5L Gas Water Heater with 4.3L Water Pump, Freestanding Tankless Water Heater, AY132Max Instant LPG Water Boiler with Carrying Bag, for Camping/Outdoor Showers

CAMPLUX

9.1

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Related productsUp to 33% off

Ariston ANDRIS R 15 L Undersink Electric Water Heater, 3kW, Control Unit, B class ErP rating, Economy “E” Setting, Manufactured to be installed in UK - 3100834.

Ariston ANDRIS R 15 L Undersink Electric Water Heater, 3kW, Control Unit, B class ErP rating, Economy “E” Setting, Manufactured to be installed in UK - 3100834.

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Hot Water Heater 6KW, 220V Domestic Kitchen & Bathroom Instant Water Heater, Stainless Steel Tankless Water Heater for Kitchen Bathroom Shower

Hot Water Heater 6KW, 220V Domestic Kitchen & Bathroom Instant Water Heater, Stainless Steel Tankless Water Heater for Kitchen Bathroom Shower

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KLARSTEIN Electric Water Heater, 30L Under Sink Water Heater for Bath and Shower, 1500W Wall Mounted Instant Hot Water Heater, Campervan Tankless Water Heater Electric for Hand Wash & Kitchen Sink

KLARSTEIN Electric Water Heater, 30L Under Sink Water Heater for Bath and Shower, 1500W Wall Mounted Instant Hot Water Heater, Campervan Tankless Water Heater Electric for Hand Wash & Kitchen Sink

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Thermomate AZ132 5L Portable Gas Water Heater, Tankless Water Heater with Folding Handle, Instant Gas Boiler Use for Outdoor Showers, Camping, Horses, RV Trip [Energy Class A]

Thermomate AZ132 5L Portable Gas Water Heater, Tankless Water Heater with Folding Handle, Instant Gas Boiler Use for Outdoor Showers, Camping, Horses, RV Trip [Energy Class A]

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11% off

6

TESY BiLight 120 Litre Electric Hot Water Cylinder Low Cost Energy Efficient Hot Water
TESY BiLight 120 Litre Electric Hot Water Cylinder Low Cost Energy Efficient Hot Water

TESY

8.8

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7

Stiebel Eltron 234407 SHC 15 GB Small unvented Electric Water Heater includinig Safety Group, 15 litres, pressurised Appliance, undersink, Plastic, 15 liters, White
Stiebel Eltron 234407 SHC 15 GB Small unvented Electric Water Heater includinig Safety Group, 15 litres, pressurised Appliance, undersink, Plastic, 15 liters, White

Stiebel Eltron

8.6

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15% off

8

Ariston ANDRIS LUX ECO 10 L Undersink Electric Water Heater 2.5kW with A Titanium Enamelled Tank, A Class Erp Rating, Copper Heating Element, Manufactured To Be Installed In UK - 3100718 , White
Ariston ANDRIS LUX ECO 10 L Undersink Electric Water Heater 2.5kW with A Titanium Enamelled Tank, A Class Erp Rating, Copper Heating Element, Manufactured To Be Installed In UK - 3100718 , White

Ariston

8.3

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9

STIEBEL ELTRON Small unvented Electric Water Heater SNO 5 Plus (GB), Water Heater Over Sink 5 l, Very Compact, 2 kW, White, 204979
STIEBEL ELTRON Small unvented Electric Water Heater SNO 5 Plus (GB), Water Heater Over Sink 5 l, Very Compact, 2 kW, White, 204979

Stiebel Eltron

8.0

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10

Thermomate ELEX5.5 Instant Electric Water Heater with Backlit LED Display, 5.5kW Tankless Hand Wash for Basins Sinks, Over/Under Sink Installation, ‎Hard Wire
Thermomate ELEX5.5 Instant Electric Water Heater with Backlit LED Display, 5.5kW Tankless Hand Wash for Basins Sinks, Over/Under Sink Installation, ‎Hard Wire

thermomate

7.8

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