The best electric boilers in 2026 are the Electric Heating Company Comet, the Heatrae Sadia Electromax, the Elnur Mattira MAC15, the Strom Electric Combi, and the Trianco Aztec.
These five models lead the market because they combine near total efficiency at the point of use with quiet, low maintenance operation, making them a genuine alternative for homes without a mains gas connection.
Below, we break down each of these boilers in detail so you can decide which one genuinely suits your property.
5 Best Electric Boilers: A Quick Look
The best electric boilers all deliver strong efficiency figures close to 100%, but they differ noticeably on output, price, and the type of property they suit best. Here’s a quick comparison to help you narrow things down.
| Boiler | Best For | Efficiency | Boiler Cost | Installed Cost | Warranty | Which? Rating | Trustpilot Score |
| EHC Comet | Overall reliability and UK manufacturing | 99.5% | £900–£1,300 | £1,600–£2,200 | 2–5 years | Not independently tested | 4.3/5 |
| Heatrae Sadia Electromax | Higher hot water demand households | 99.8% | £1,100–£1,600 | £1,900–£2,600 | 2–5 years | Not independently tested | 4.2/5 |
| Elnur Mattira MAC15 | Smart controls and single bathroom homes | 99.5% | £950–£1,300 | £1,700–£2,300 | 2–3 years | Not independently tested | 4.1/5 |
| Strom Electric Combi | Flats and budget conscious buyers | 99.5% | £700–£1,000 | £1,500–£2,000 | 2 years | Not independently tested | 4.0/5 |
| Trianco Aztec | Straightforward, no frills replacement | 99% | £850–£1,200 | £1,600–£2,200 | 2–3 years | Not independently tested | 4.0/5 |
5 Best Electric Boilers: Reviewed By Our Experts
The best electric boilers each suit slightly different property types and household needs, so it’s worth understanding what makes each one stand out. Here’s our detailed breakdown of each model.
1. EHC Comet: Best For Overall Reliability And UK Manufacturing
The Electric Heating Company Comet has built a strong reputation as one of the most trusted electric combi boilers made in the UK, appealing to homeowners who value a British manufactured product with straightforward, no fuss operation.
Electric Heating Company has specialised almost exclusively in electric heating for decades, which gives them a depth of expertise that some newer entrants to the electric boiler market simply don’t have. This model is particularly popular in properties without mains gas access, such as rural homes and some flats.
| Feature | Detail |
| Output | Various, typically 9kW to 14.4kW |
| Efficiency | 99.5% |
| Flue required | No |
| Warranty | 2–5 years |
| Boiler price | £900–£1,300 |
| Installed price | £1,600–£2,200 |
Specs and features: The unit is compact, wall mounted, and requires no flue or gas supply, making installation noticeably simpler and quicker than a traditional gas boiler swap.
Efficiency: It operates at around 99.5% efficiency at the point of use, converting almost all the electricity it draws directly into heat, though it’s worth remembering electricity costs considerably more per unit than gas.
Estimated cost of the unit: The boiler alone typically costs between £900 and £1,300, depending on output size.
Cost with installation: Once fitted, most households pay between £1,600 and £2,200, generally lower than a comparable gas boiler installation since no flue work or gas safety checks are needed.
Running costs: Because UK electricity currently costs roughly three to four times more per unit than gas, running costs for an electric boiler like the Comet tend to be noticeably higher than a gas equivalent for the same heat output, particularly in larger homes with heavier demand.
Which? and Trustpilot ratings: EHC has not been independently tested by Which? in the same way as major gas boiler brands, but it holds a solid 4.3 out of 5 on Trustpilot, with customers often praising straightforward installation and quiet running.
Should You Choose The EHC Comet?
Choose the EHC Comet if…
- You don’t have a mains gas connection at your property
- You want a British manufactured boiler with a strong track record
- You need a quick, straightforward installation without flue work
- Your household has moderate rather than heavy hot water demand
Do not choose the EHC Comet if…
- You have access to mains gas and want the lowest possible running costs
- Your home has heavy simultaneous hot water demand across multiple bathrooms
- You want a warranty as long as those offered on premium gas boilers
2. Heatrae Sadia Electromax: Best For Higher Hot Water Demand Households
The Heatrae Sadia Electromax stands out among electric boilers because it comes with a built in cylinder, giving it genuinely better hot water storage capacity than a standard electric combi unit.
Heatrae Sadia has manufactured water heating products in the UK for decades, and this model reflects that experience by addressing one of the biggest criticisms of electric combi boilers, namely limited hot water flow for larger households. It’s a popular choice for family homes without gas access that still want dependable hot water for several occupants.
| Feature | Detail |
| Output | 6kW or 9kW plus cylinder |
| Efficiency | 99.8% |
| Flue required | No |
| Warranty | 2–5 years |
| Boiler price | £1,100–£1,600 |
| Installed price | £1,900–£2,600 |
Specs and features: The boiler includes an integrated cylinder that stores hot water in advance, an unusually high efficiency rating, and compatibility with underfloor heating systems in addition to standard radiators.
Efficiency: It carries an impressive 99.8% efficiency rating at the point of use, among the highest figures of any electric boiler on the market.
Estimated cost of the unit: Pricing for the boiler alone generally sits between £1,100 and £1,600, reflecting the added cylinder component.
Cost with installation: Installed costs typically range from £1,900 to £2,600, higher than a standard electric combi due to the extra space and pipework needed for the built in cylinder.
Running costs: Because hot water is stored in advance rather than heated purely on demand, running costs can be managed more effectively by heating water during cheaper off peak electricity periods if you’re on a suitable tariff.
Which? and Trustpilot ratings: Heatrae Sadia has not been independently tested by Which? in this category, but it holds a respectable 4.2 out of 5 on Trustpilot, with reviewers frequently mentioning strong hot water performance for larger households.
Should You Choose The Heatrae Sadia Electromax?
Choose the Heatrae Sadia Electromax if…
- Your household has consistent higher hot water demand
- You’re on an off peak electricity tariff and can heat water overnight
- Your property is suitable for underfloor heating alongside radiators
- You want stored hot water rather than purely on demand heating
Do not choose the Heatrae Sadia Electromax if…
- You have limited space for an integrated cylinder unit
- You want the most compact single unit electric boiler available
- Your household has light, infrequent hot water use
3. Elnur Mattira MAC15: Best For Smart Controls And Single Bathroom Homes
The Elnur Mattira MAC15 has carved out a strong niche among electric boilers for its genuinely useful smart control features, appealing to tech comfortable homeowners who want to manage their heating remotely. Elnur has built a reputation in the electric heating space for user friendly design, and this model reflects that focus with app connectivity that lets homeowners adjust settings without being physically present.
It’s particularly well suited to smaller, single bathroom properties where the flow rate limitations common to electric combi boilers are less of a concern.
| Feature | Detail |
| Output | Typically 9kW to 15kW |
| Efficiency | 99.5% |
| Flue required | No |
| Warranty | 2–3 years |
| Boiler price | £950–£1,300 |
| Installed price | £1,700–£2,300 |
Specs and features: The unit includes smart app connectivity for remote control and monitoring, efficient modulation that adjusts power draw to match real time demand, and a straightforward digital interface for everyday use.
Efficiency: It operates at around 99.5% efficiency, converting nearly all the electricity it uses into usable heat for the property.
Estimated cost of the unit: The boiler alone typically costs between £950 and £1,300.
Cost with installation: Installed pricing generally runs from £1,700 to £2,300, depending on any additional electrical work required.
Running costs: Running costs are broadly comparable to other electric combi boilers of similar output, though the smart scheduling features can help reduce wasted electricity by avoiding unnecessary heating when the property is empty.
Which? and Trustpilot ratings: Elnur has not been independently tested by Which?, but it holds a respectable 4.1 out of 5 on Trustpilot, with users often highlighting the app functionality as a genuine advantage.
Should You Choose The Elnur Mattira MAC15?
Choose the Elnur Mattira MAC15 if…
- You want genuine app based remote control over your heating
- Your property has a single bathroom with modest hot water demand
- You’re comfortable with a slightly shorter standard warranty
- You value modulating power draw to reduce wasted electricity
Do not choose the Elnur Mattira MAC15 if…
- You want the longest warranty available among electric boilers
- Your household has heavier hot water demand across multiple bathrooms
- You’d prefer a more established, longer standing UK brand
4. Strom Electric Combi: Best For Flats And Budget Conscious Buyers
The Strom Electric Combi has become a genuinely popular choice for flats and apartments across the UK because it offers a compact footprint at one of the more affordable price points in this category.
Strom has focused on making electric heating accessible without unnecessary extras, which keeps both the unit price and installation costs lower than several rivals on this list. It’s a sensible option for landlords managing smaller rental flats where budget matters as much as reliability.
| Feature | Detail |
| Output | Typically 9kW to 18kW |
| Efficiency | 99.5% |
| Flue required | No |
| Warranty | 2 years |
| Boiler price | £700–£1,000 |
| Installed price | £1,500–£2,000 |
Specs and features: The boiler features a slim, wall mounted design suited to tight utility cupboards, straightforward controls, and no need for a flue or gas supply.
Efficiency: It operates at around 99.5% efficiency, a strong figure in line with other electric boilers on this list.
Estimated cost of the unit: The boiler alone typically costs between £700 and £1,000, the lowest of all five models compared here.
Cost with installation: Installed pricing generally starts from around £1,500 and can reach £2,000, making it one of the most affordable options overall.
Running costs: Running costs are broadly comparable to other electric combi boilers of similar output, though smaller flats with lower overall heating demand tend to see more manageable monthly bills despite electricity’s higher unit cost.
Which? and Trustpilot ratings: Strom has not been independently tested by Which?, but it holds a reasonable 4.0 out of 5 on Trustpilot, with reviewers often mentioning good value for money as a key strength.
Should You Choose The Strom Electric Combi?
Choose the Strom Electric Combi if…
- You’re a landlord managing a smaller rental flat on a budget
- You want the lowest unit and installed price on this list
- Your property has genuinely tight installation space
- You’re comfortable with a shorter standard warranty
Do not choose the Strom Electric Combi if…
- You want a longer warranty for extra peace of mind
- Your household has heavier hot water demand than a typical flat
- You need a boiler with an established Which? testing history
5. Trianco Aztec: Best Straightforward, No Frills Replacement
The Trianco Aztec rounds out this list as a dependable, straightforward electric boiler for homeowners who want reliable heating without unnecessary bells and whistles.
Trianco has manufactured heating products in the UK for decades, and this model reflects that heritage with a design focused on getting the basics right rather than chasing the latest smart features. It’s available across multiple outputs, giving it genuine flexibility for different property sizes without gas access.
| Feature | Detail |
| Output | Multiple outputs available |
| Efficiency | 99% |
| Flue required | No |
| Warranty | 2–3 years |
| Boiler price | £850–£1,200 |
| Installed price | £1,600–£2,200 |
Specs and features: The boiler includes a simple, easy to use control panel, reliable performance across a range of available outputs, and a straightforward installation process that doesn’t require flue work.
Efficiency: It carries a strong efficiency rating of around 99%, only marginally behind the other models on this list.
Estimated cost of the unit: The boiler alone typically costs between £850 and £1,200, depending on the chosen output.
Cost with installation: Installed pricing generally runs from £1,600 to £2,200.
Running costs: Running costs sit broadly in line with other electric boilers of comparable output, making it a sensible, predictable choice for households that don’t need advanced smart features.
Which? and Trustpilot ratings: Trianco has not been independently tested by Which?, but it holds a solid 4.0 out of 5 on Trustpilot, with customers often praising its straightforward, dependable performance.
Should You Choose The Trianco Aztec?
Choose the Trianco Aztec if…
- You want a straightforward, no frills electric boiler
- You value flexibility across different available outputs
- You’re comfortable without smart app controls
- You want a dependable option from a long standing UK manufacturer
Do not choose the Trianco Aztec if…
- You want the absolute highest efficiency figure on this list
- Smart remote control features are a priority for you
- Your household has significant hot water demand across multiple bathrooms
How We Choose The Best Electric Boilers
We chose the best electric boilers by combining hands-on installation experience gathered from fitting boilers in properties across the UK without mains gas access, alongside independent data from trusted third party sources. As nationwide installers working with homeowners and landlords every single day, our recommendations reflect what genuinely performs well in real off grid and flat based properties, not just impressive sounding spec sheets.
- Verified manufacturer data on efficiency, output, and warranty terms directly against official documentation from EHC, Heatrae Sadia, Elnur, Strom, and Trianco
- Cross referenced independent customer feedback from Trustpilot to balance technical performance against genuine satisfaction, since electric boilers are rarely tested by Which? in the same depth as gas models
- Drew on feedback from our own Gas Safe and electrically qualified installer team, who fit these exact models regularly in UK properties without gas access
- Compared unit and installed pricing across multiple UK suppliers to make sure figures reflect genuine market conditions rather than inflated list prices
- Prioritised boilers correctly suited to different property types, since a flat’s needs differ significantly from a larger family home without gas access
- Considered the needs of both homeowners and landlords, including off grid rural properties and city flats where electric heating is often the only practical option
How To Choose The Best Electric Boiler For Your Property
Choosing the best electric boiler for your property comes down to understanding whether electric heating genuinely suits your household’s hot water demand and electricity setup. Work through this checklist before making your final decision.
- Confirm you actually need an electric boiler. They suit homes without mains gas access, off grid properties, and smaller flats, but rarely make sense financially for larger homes with gas already connected
- Check your property’s electrical supply, since higher output electric boilers may require a three phase electricity connection rather than the standard single phase supply found in most homes
- Consider your hot water demand, since standard electric combi boilers have more limited flow rates than gas combi boilers, and models with a built in cylinder suit heavier demand better
- Think about your electricity tariff, since Ofgem’s energy price cap for a typical household from October 2025 to December 2025 sits at roughly £1,755 a year, and electric heating running costs are heavily influenced by your specific tariff and any off peak rates available
- Compare warranty terms carefully, since most electric boilers offer shorter warranties of 2 to 5 years compared to the 10 to 12 years common on premium gas boilers
- Factor in your total budget for both the unit itself and installation, remembering that electric boilers often cost less to install since no flue or gas safety work is needed
- Ask about smart control compatibility if you want to manage your heating remotely and potentially reduce wasted electricity
- Get a proper home survey before committing, since correctly sizing an electric boiler and confirming your electrical supply capacity is essential for reliable performance
Get Your New Electric Boiler Installed With A 12-Year Warranty
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FAQs
Are electric boilers more expensive to run than gas boilers?
Electric boilers typically cost more to run than gas boilers for the same heat output, mainly because electricity costs several times more per unit than gas on most standard UK tariffs. Homeowners already connected to mains gas rarely save money by switching to an electric boiler, though those without gas access often find it the most practical available option.
Can an electric boiler be installed in a flat with limited space?
Electric boilers are particularly well suited to flats because they don’t require a flue, gas supply, or external wall access, which makes them easier to fit into tight utility cupboards or even internal rooms compared to a traditional gas combi boiler. This flexibility is one of the main reasons electric boilers remain popular in UK apartment blocks and converted properties.
Do electric boilers qualify for any government grants or incentives in the UK?
Standard electric boilers do not typically qualify for schemes like the Boiler Upgrade Scheme, which is specifically aimed at heat pumps and biomass boilers rather than direct electric resistance heating. Homeowners interested in low carbon heating grants should compare electric boilers against heat pumps, since the latter often benefits from more substantial government funding support.
How long does an electric boiler typically last compared to a gas boiler?
Electric boilers generally have fewer moving mechanical parts than gas boilers, which can mean less can go wrong over time, and many models are expected to last between 10 and 15 years with proper maintenance. However, warranties on electric boilers tend to be shorter than premium gas boilers, so it’s worth checking manufacturer support terms carefully before buying.
Is a three phase electricity supply always needed for an electric boiler?
Smaller electric boilers rated up to around 14.4kW typically run on a standard single phase domestic electricity supply, but higher output electric boilers used for larger properties or those without gas often require a three phase supply, which may involve additional work from your electricity distributor. A proper electrical survey before installation confirms exactly what your property can support.