Advertising Disclosure Immersion Heater Comparison - June 2025
6 Best Immersion Heater In the UK
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. By purchasing the products we rank, you’ll get the lowest price we found while we may receive a commission at no cost to you, which will help us continue to provide you with value.
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| 1 Best Choice  9.8Exceptional | 2  9.6Exceptional | 3  9.5Excellent | 4  9.3Excellent | 5  9.2Excellent | 6  9.1Excellent |
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ModelT-Smart Tesla Vertical Top Entry 27" Incoloy Cylinder Immersion Heater & Smart Thermostat TIHTS650 | Model Tianbi Electric Immersion Water Heater, Bucket Water Heater, Household High Power Submersible Pool Bathtub Heater with Thermostat,Auto Shutoff | Model SPARES2GO 27" Incoloy Hard Hot Water Immersion Heater Boiler Element + Copper Pocket + Thermostat | Model Tesla 27" Copper Immersion Heater with 2.1/4" Boss | Model Cotherm 14" Replacement Unvented Immersion Heater Element ELE14IN800UNV | Model Water Heater, 2500W Warmer Immersion Heater Portable Electric Electric Immersion Water Heater with Intelligent Thermostat and 304 Stainless Steel Cover, Auto Shutoff |
BrandT-Smart | Brand Tianbi | Brand Spares2go | Brand TESLA | Brand Generic | Brand AUPERTO |
Reviews | Reviews | Reviews  | Reviews | Reviews | Reviews - |
Tech Specs | |||||
Included componentsIncludes Smart Thermostat | Included components - | Included components - | Included components - | Included components Immersion Heater and thermostat | Included components - |
item weight- | item weight 630 g | item weight - | item weight 880 g | item weight - | item weight 500 g |
product dimensions- | product dimensions 38 x 18 x 5 cm 630 g | product dimensions - | product dimensions - | product dimensions - | product dimensions 40 x 7.5 x 7 cm 500 g |
batteries required- | batteries required No | batteries required - | batteries required No | batteries required - | batteries required No |
color- | color Silver | color - | color - | color White, Brass, Grey | color silver |
Available On | Available On | Available On | Available On | Available On | Available On |
Our Top 3 Picks
Here are the top 3 recommended products with more information to help you find the right product for you
9.8
1T-SmartT-Smart Tesla Vertical Top Entry 27" Incoloy Cylinder Immersion Heater & Smart Thermostat TIHTS650
Why we love it
Can be controlled by phone
Reduces energy consumption
Compatible with many types of systems
Main highlights- Vertical Top Mount Only Immersion Heater & Smart Thermostat
- The Tesla T smart gives the home-owner complete control over their hot water via the t-smart app
- IMPORTANT: Unsure if it is compatible? Contact Sparesweb today.
- Advanced software for heating optimization, reduces energy consumption up to 15%
- 27" Incoloy Immersion Heater with 2 1/4" Boss
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9.6
2Tianbi
Tianbi Electric Immersion Water Heater, Bucket Water Heater, Household High Power Submersible Pool Bathtub Heater with Thermostat,Auto Shutoff
Why we love it
Safe for use with protection guard.
Quickly heats water efficiently.
Versatile for various container sizes.
Main highlights- 【Wide Applications】: Submersible water heaters can be used in containers of different sizes, such as small swimming pools, buckets, washbasins, and bathtubs, and can also be used to heat water to clean sinks, food, dishes, etc. to avoid exposure to cold water.
- 【Thermostat, automatic shutoff function】: Built-in constant temperature control, when the water temperature reaches a certain temperature, the electric water heater will automatically turn on and off to maintain the water temperature, without worrying about overheating. Lie in the bathtub every day and enjoy the comfort of hot water to relieve fatigue and relax. Note: The heater should not be in the water when working.
- 【Safe】: The heavy-duty stainless steel guard on the bucket water heater contains heating elements to avoid direct contact with people or animals for added safety, and the holes on the guard help release heat into the water Dry burning will automatically power off.
- 【Fast Heating】: 1500W/2500W high power bird's nest water heater can quickly heat 5 gallons of water in a few minutes, allowing you to play quickly in a small pool and enhance the bonding of your home. Fast heating saves you time and electricity considerably.
- 【Easy to Use】: The immersion water heater is easy to use, just put the electric heater into the water container, then cover the hot water completely with the heating element in the stainless steel protection, then plug it into any grounded wall socket. Note: The power cord and black handle should not be immersed in water.
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9.5
3
Spares2goSPARES2GO 27" Incoloy Hard Hot Water Immersion Heater Boiler Element + Copper Pocket + Thermostat
Why we love it
Ideal for hard water areas, prevents limescale buildup.
High power and reliable performance at 3000W.
Premium quality, durable and well-made replacement part.
Main highlights- Specifications: Length: 27" / 68.5cm -- Material: Incoloy Copper Pocket -- Power: 3000W / 230V -- Tested by Intertek to: BS-EN60335-2-73 and BS-EN60730-2-9 -- 15A Dual Safety Thermostat -- 2 1/4" Brass Boss & Sealing gasket + Metal Cap -- Wired and ready for use
- Premium quality, replacement / spare part
- Hard Water Incoloy Immersion Water Heating Element + Thermostat made for SPARES2GO (27", 3000W, 230V)
- Designed for use in areas of hard water where limescale is a problem.
Our ranking system
The TopChoice.co.uk Team selects top-of-the-line items from a wide selection and conducts rigorous evaluations on almost all the products available on the internet. We rank each product based on how well it matches our criteria.We can ensure that the product is well-tested with the help of our expertise, experts, and artificial intelligence technology. TopChoice.co.uk requires consistent care for the products we review, ensuring that our assessments are always accurate and up to date.
Features
Our team of experts analyzes key attributes, capabilities, significance, and many more depending on the type of product to determine its effectiveness.
Consumer Reviews
We ensure an evaluation of the ratings using references all over the internet for each product. With the help of our AI technology and professional review teams, we give weight to the worth of individual user experiences.
Popularity
Popularity is an important criterion in choosing a product. Several factors contribute to the popularity of the products on our site, including prestige, relevance, reputation, news, and more.
Value for money
TopChoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
Value for money
TopChoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
