This article contains affiliate links. We may earn a commission if you buy through our links, at no extra cost to you. Last reviewed: July 2026.
iHeat is a fixed-price online boiler installer that quotes in about 60 seconds, fits from around £1,985, and can install as soon as the next working day. It holds Which? Trusted Trader accreditation and a Trustpilot rating of 4.8 stars from more than 10,000 reviews, and it fits a genuinely wide range of brands: Worcester Bosch, Vaillant, Ideal, Viessmann, Alpha and Glow-worm. That brand spread is its clearest advantage over the better-known online installers, most of which stick to the same five mainstream names.
This review covers what iHeat actually is and who owns it, what it costs, the finance and warranty position, how the install works, what customers say, and how it compares with Heatable, the other independent Which?-accredited online installer it is most often confused with.
★★★★★
4.8 from 10,000+ reviews
iHeat
A strong independent online installer with the widest boiler brand range in the segment, Which? Trusted Trader accreditation, and a 4.8-star record across more than 10,000 Trustpilot reviews. Best suited to buyers who want a specific brand the bigger platforms do not carry, or who need a boiler fitted fast. The engineer network is smaller than the largest competitors, and installs are subcontracted to vetted local firms, so experience can vary a little by area.
iHeat at a glance
| What it is | Fixed-price online boiler installation platform |
|---|---|
| Company | iHeat is a trading style of Leads UK Ltd, operating since 2017, based in Westhoughton, Bolton |
| Accreditation | Which? Trusted Trader |
| Boiler brands fitted | Worcester Bosch, Vaillant, Ideal, Viessmann, Alpha, Glow-worm |
| Fuel types | Gas and LPG (no oil boilers) |
| Quote time | About 60 seconds online, no home survey before quoting |
| Install timeline | Next working day available on orders placed before 3pm |
| Engineers | Local Gas Safe registered subcontractors, onboarded by iHeat |
| Trustpilot rating | 4.8 stars from 10,000+ reviews (92% 5-star, 2% 1-star) |
| Other services | Boiler servicing and repairs, air conditioning, EV chargers |
| Price match | Price match guarantee offered |
| Entry price | From ~£1,985 fitted |
| 0% finance | 0% APR over 24 months on selected boilers |
What iHeat actually is
iHeat runs the same model as the other fixed-price online installers: you answer around ten questions about your home instead of booking a home survey, you see real fitted prices with finance options on screen, you pick an installation date, and a local Gas Safe registered engineer turns up and does the job. There is no field sales team and no in-person quote, which is where the cost saving comes from.
The company is a trading style of Leads UK Ltd, has been operating since 2017, and is run by co-founder and managing director Rick Hope from a base in Westhoughton, near Bolton. It is independently owned, with no energy supplier or boiler manufacturer behind it, which is worth knowing if you want a recommendation that is not shaped by a shareholder relationship.
What is included in the fixed price is more generous than the segment average. Alongside the boiler and installation, iHeat covers the pipework connected to your existing system, the flue kit, a chemical flush, a magnetic system filter, wireless controls, and removal of the old boiler, and it upgrades the gas pipe at no extra cost if the job needs it. That last point matters: an undersized gas supply pipe is one of the most common day-of-install surprise charges elsewhere.
See your installed iHeat price in about 60 seconds
The quickest way to see what iHeat would charge for your home is the online quote tool. Answer a handful of questions, see real fitted prices across Worcester Bosch, Vaillant, Ideal, Viessmann, Alpha and Glow-worm, and book next-day installation if you proceed. No obligation, no home survey before quoting, and no follow-up sales calls.
- Online quote in ~60 seconds, install as soon as tomorrow
- Widest brand range in the segment, six brands including Viessmann, Alpha and Glow-worm
- Free gas pipe upgrade if your job needs one
- 4.8 stars from 10,000+ Trustpilot reviews
The boilers iHeat fits
This is iHeat’s standout feature. Most online installers offer the same five mainstream brands; iHeat carries six, including two that are hard to find on the bigger platforms.
| Worcester Bosch | The most recognised UK brand and the densest service network. See our Greenstar 4000 review. |
|---|---|
| Vaillant | German-built, class-leading modulation and long warranties on the ecoTEC Plus. See our ecoTEC Plus review and ecoTEC Pro review. |
| Ideal | British-made at Hull. Strong value per pound across the Logic and Vogue MAX ranges. |
| Viessmann | German premium engineering, well regarded by engineers and not carried by every online installer. A genuine reason to quote iHeat. |
| Alpha | Value tier with long warranties as standard, and typically iHeat’s keenest headline prices. |
| Glow-worm | Budget brand, part of the Vaillant group. Useful when the priority is the lowest fitted price. |
If you specifically want a Viessmann or an Alpha, iHeat is one of the few fixed-price online routes to one, and in our view that is the single strongest reason to get a quote from them. iHeat does not install oil boilers, so off-grid homes will need a specialist. For our independent take across the market, see our best combi boiler UK guide.
How much does an iHeat boiler cost?
iHeat’s own guidance puts a new boiler with installation at roughly £1,500 to £4,500 depending on boiler type, brand, property size and location, with entry prices starting from around £1,985 fitted. Typical ranges look like this:
| Job type | Typical iHeat fitted price |
|---|---|
| Combi swap, entry brand (Alpha, Glow-worm) | from ~£1,985 |
| Combi swap, mainstream (Ideal, Vaillant, Worcester) | ~£2,100–£3,000 |
| Combi swap, premium (Viessmann, Worcester 8000) | ~£2,800–£3,800 |
| Conventional to combi conversion | ~£2,800–£4,500 |
| Back boiler to combi replacement | ~£3,000–£4,800 |
| Vertical flue (if required) | Additional cost, shown in the quote |
These are indicative ranges drawn from iHeat’s published pricing and independent price surveys, and your exact figure comes from the quote tool. Two things worth noting in iHeat’s favour on price: there is a price match guarantee if you find the same job cheaper, and the free gas pipe upgrade removes a charge that catches people out elsewhere. For context on how the online route compares with the traditional one, see our British Gas boiler cost guide.
iHeat finance
iHeat is an approved credit broker and offers finance through panel lenders rather than lending itself. The structure:
| 0% APR (interest-free) | Available on selected boilers over 24 months |
|---|---|
| Longer-term finance | Terms up to 10 years, with published rates appearing at 9.9% APR and 11.9% APR depending on the plan and boiler |
| Deposit | Optional, up to 50%, which reduces the monthly payment |
| Approval | Applied for during checkout, usually with a fast decision |
| Other payment | Pay in full by card, or Klarna instalments on servicing and repairs |
The 0% window of 24 months is shorter than the longest deals in the segment, and if a long interest-free term is your priority you will do better elsewhere. Because iHeat’s published rates have appeared at more than one figure, check the actual APR and total repayable shown in your own quote rather than relying on a headline. Our best boiler finance deals guide ranks the options across providers.
The installation process
- Online quote (about 60 seconds). Around ten questions about your existing setup, with fixed prices and finance options shown before you commit.
- Pick your boiler and date. Each listing shows output, total price, monthly finance, warranty length and exactly what is included. You choose the installation date from live availability.
- Optional upgrades. Smart controls such as Nest or Hive can be added for an extra cost, or your existing smart controls can be connected.
- Confirmation. iHeat usually calls to clarify details and may ask for photos of your existing boiler and pipework before the install date.
- Installation day. The engineer removes the old boiler, chemically flushes the system, fits the new boiler, filter and controls, then commissions and demonstrates it. A straightforward swap is typically done within a day.
- Aftercare. iHeat registers the manufacturer warranty and typically follows up by phone after the install.
The engineers are local Gas Safe registered subcontractors rather than employed staff, which iHeat is upfront about, and it says it manages any issues that arise. That model is standard across the online segment and generally works well, but it does mean the person in your home is not an iHeat employee, so the experience depends partly on which firm covers your postcode. iHeat’s network is smaller than the largest competitors, which can matter for availability in remote areas at peak times.
Warranty and aftercare
Manufacturer warranty length depends on the boiler rather than on iHeat, and is displayed against each model in the quote. Many of the boilers iHeat fits carry up to 10 years, with Alpha’s ranges offering long cover as standard at the value end. iHeat also provides a workmanship guarantee on the installation itself, and registers the manufacturer warranty on your behalf.
As with every installer, annual servicing is normally required to keep the manufacturer warranty valid. iHeat sells servicing and repairs as well as installations, so you can book that through them, though you are free to use any Gas Safe registered engineer. See our annual boiler service guide for what that involves and what it should cost.
iHeat reviews and reputation
iHeat’s Trustpilot record is genuinely strong: 4.8 stars from more than 10,000 reviews, with 92% rated 5-star and 2% at 1-star. It also holds Which? Trusted Trader accreditation, which requires passing an independent assessment of trading practices, and it responds to negative reviews rather than ignoring them. For a company that sells a several-thousand-pound purchase entirely online, that is a meaningful trust record. You can read the reviews on Trustpilot and judge for yourself.
The recurring positive themes are consistent and specific: a fast, clear quote process with fixed pricing and no pushy sales calls, genuinely quick installation when a boiler has failed, and engineers who are described as tidy, punctual and willing to explain the controls. Speed in an emergency comes up repeatedly, which is the situation most people are in when they buy a boiler online.
The honest negatives, which are a small minority, cluster around coordination rather than workmanship. The complaints that appear are typically about rescheduling at short notice, communication when more than one trade is involved, and expectations about making good the area around the old boiler. In our assessment the pattern is that the engineering is reliable and the admin is where the occasional slip happens, which is worth knowing if you are booking around a day off work.
iHeat vs Heatable
These two get compared constantly, and confused just as often, so to be clear: iHeat and Heatable are not the same company. They are separate, independent businesses with different owners. iHeat is a trading style of Leads UK Ltd; Heatable is Heatable Ltd. Both are independent, both hold Which? Trusted Trader accreditation, and both run the same fixed-price online model, which is why they look so alike.
| iHeat | Heatable | |
|---|---|---|
| Trustpilot | 4.8 stars, 10,000+ reviews | 4.8 stars, 14,000+ reviews |
| Accreditation | Which? Trusted Trader | Which? Trusted Trader |
| Ownership | Independent (Leads UK Ltd) | Independent (Heatable Ltd) |
| Brands | Six, including Viessmann, Alpha and Glow-worm | Five mainstream brands |
| Quote speed | ~60 seconds | ~90 seconds |
| Entry price | from ~£1,985 | from ~£1,895 |
| 0% APR term | Up to 24 months | Up to 48 months |
| Credit acceptance | Panel lenders, standard acceptance | Broader, multi-lender panel including subprime |
| Included extras | Free gas pipe upgrade, filter, flush, controls | Filter, flush, controls |
| Save a quote | Not advertised | Save My Quote feature |
Pick iHeat if you want a Viessmann, Alpha or Glow-worm that Heatable does not carry, you need the fastest possible quote and install, or the free gas pipe upgrade applies to your job.
Pick Heatable if you want a longer 0% finance term, you have an imperfect credit profile and need the broadest acceptance, or you want to save a quote and compare at your own pace. Our full Heatable review covers that in detail.
In our view they are closely matched, and the honest answer is to quote both. It takes about three minutes in total and the cheaper number for your specific home varies by boiler and postcode.
Pros and cons
Where iHeat wins
- Widest boiler brand range in the segment, including Viessmann, Alpha and Glow-worm
- Which? Trusted Trader accredited
- 4.8 stars from more than 10,000 Trustpilot reviews, 92% of them 5-star
- Fastest quote in the segment at around 60 seconds
- Next working day installation on orders before 3pm
- Free gas pipe upgrade where the job requires it, a common surprise charge elsewhere
- Price match guarantee
- Independently owned, with no manufacturer or energy supplier shareholder
Where iHeat loses
- 0% APR runs to 24 months, shorter than the best in the segment
- Published finance rates have appeared at more than one figure, so check your own quote
- Engineer network is smaller than the largest online competitors
- Installs are subcontracted, so experience can vary by area
- Occasional reports of rescheduling and coordination issues
- No oil boilers, so off-grid homes are not covered
- No quote-saving feature for comparison shopping
Who iHeat is for
iHeat is the right pick if you:
- Want a Viessmann, Alpha or Glow-worm boiler, which most online installers do not carry
- Need a boiler fitted fast, ideally tomorrow
- Want the widest choice of brands in one quote
- Value an independent installer with Which? accreditation
- Might need a gas pipe upgrade and want it included
Consider Heatable, BOXT or a local engineer if you:
- Want a 0% finance term longer than 24 months
- Have an imperfect credit profile and need the broadest lender acceptance
- Live somewhere remote where a larger engineer network gives better availability
- Need an oil boiler
- Want to save and compare quotes over several days
Final verdict
iHeat is a credible, well-rated online installer that deserves a quote from most buyers, and a definite one from anyone who wants a brand the bigger platforms do not stock. The Which? accreditation, the 4.8-star record across more than 10,000 reviews, and the genuinely useful inclusions (free gas pipe upgrade, filter, flush, controls) all point to a serious operation rather than a thin lead-generation site.
The honest limitations are the shorter 0% finance window, a smaller engineer network than the biggest competitors, and a minority of reviews reporting coordination slips. None of those are dealbreakers, but they are the reasons we place it just behind our top pick rather than level with it.
Our recommendation: if you want Viessmann or Alpha, or you need a boiler tomorrow, quote iHeat first. Otherwise quote both iHeat and Heatable and take the better number for your home. Both are independent, both are Which? accredited, and the comparison costs you about three minutes.
Frequently asked questions about iHeat
Is iHeat a legitimate company?
Yes. iHeat is an established UK business, trading as a style of Leads UK Ltd, operating since 2017 from a base in Westhoughton near Bolton. It holds Which? Trusted Trader accreditation, is an approved credit broker, uses Gas Safe registered engineers, and carries a 4.8-star Trustpilot rating from more than 10,000 reviews. Those are strong independent signals, though as with any installer it is worth reading recent reviews and checking exactly what your quote includes.
Are iHeat and Heatable the same company?
No. iHeat and Heatable are two separate, independent companies with different owners. They are often compared because both are UK online fixed-price boiler installers running a similar quote-online, install-fast model, and both hold Which? Trusted Trader accreditation. iHeat is a trading style of Leads UK Ltd, while Heatable is Heatable Ltd.
Who owns iHeat?
iHeat is independently owned. It trades as a style of Leads UK Ltd and was co-founded in 2017 by Rick Hope, who is the managing director. Unlike some competitors, it has no boiler manufacturer or energy supplier as a shareholder.
How much does an iHeat boiler cost?
iHeat’s fitted prices start from around £1,985, and its own guidance puts a new boiler with installation at roughly £1,500 to £4,500 depending on boiler type, brand, property size and location. A mainstream combi swap typically lands around £2,100 to £3,000 fitted, while back boiler replacements and conversions cost more. The fixed price includes the boiler, installation, flue kit, chemical flush, magnetic filter, wireless controls and removal of the old boiler.
What boilers does iHeat fit?
iHeat fits Worcester Bosch, Vaillant, Ideal, Viessmann, Alpha and Glow-worm, which is a wider range than most fixed-price online installers offer. It installs gas and LPG boilers but does not install oil boilers.
Does iHeat offer 0% finance?
Yes. iHeat offers 0% APR on selected boilers over 24 months, and longer terms up to 10 years, with published rates appearing at 9.9% APR and 11.9% APR depending on the plan and boiler. An optional deposit of up to 50% reduces the monthly payment. iHeat is an approved credit broker introducing applications to panel lenders, not the lender itself, so check the exact APR and total repayable in your own quote.
Does iHeat install next day?
Yes, next working day installation is available on orders placed before 3pm, subject to engineer availability in your area. Fast installation when a boiler has failed is one of the most consistent themes in iHeat’s customer reviews.
Is iHeat Which? Trusted Trader?
Yes. iHeat holds Which? Trusted Trader accreditation, which requires passing an independent assessment of trading practices and service standards.
Does iHeat use its own engineers?
No. iHeat uses local Gas Safe registered subcontractors rather than employed engineers, which it states openly, and says it manages any issues that arise. This is standard across fixed-price online installers and generally works well, but it does mean your installer is a local firm rather than an iHeat employee.
See your installed iHeat price in about 60 seconds
iHeat quotes a fixed fitted price online with no home survey first, across the widest brand range in the segment, and can install as soon as the next working day. There is no obligation, so it costs nothing to see your number before you decide.
- Quote in ~60 seconds, install as soon as tomorrow
- Six brands including Viessmann, Alpha and Glow-worm
- Free gas pipe upgrade if your job needs one
- Price match guarantee, and 0% APR available on selected boilers
This review was last updated in July 2026. Prices, finance terms and review figures are indicative, drawn from iHeat’s published information and independent sources, and change over time. Always check the live quote for your exact figure before committing. We are not a credit broker, lender or installer. iHeat handles quoting, finance and installation directly.