They're all as good as each other really, so here's the cheapest boilers.
Are you looking for a cheap combi boiler? Or simply one to suit your budget? Are those two one and the same? Join the club (it’s free)!
Like any industry, cheapness often goes hand in hand with poor quality as well as a poor warranty in the boiler world. Or with having few friends, since you won’t buy them a pint.
The good news is that's not always the case and there are some boiler brands that do offer entry-level boilers to suit those with the smallest of budgets.
In this article, we'll be highlighting some of the cheapest (and best) boilers you can buy, as well as the different ways you can pay for them (you may even be able to pay for your boiler in monthly instalments).
The quick answer? The best and cheapest boiler in our view is the Alpha E Tec NX, it comes with a 10-year warranty (when purchased via Heaatble) and is award-winning. Another good option is the Worcester Bosch Greenstar 1000 (available as a combi boiler only).
How much does a cheap boiler cost?
What does cheap mean? One man's definition of cheap could be another's definition of expensive. And until boilers fit in a vending machine, you won’t find them for a fiver, either.
With that said, here's the minimum amount you can expect to pay...
In general, you can expect to pay between £600 to £900 for a new combi boiler, however, remember that this price does not include the gas-safe installation.
For the complete installation of a new combi boiler, on average you will pay around £2,000. And since you’re essentially installing a potentially explosive gas tank, you don’t want to go cheaper than that.
Prefer video? Check out our YouTube video below where we review the most affordable boilers:
Best Cheap Boilers in 2025
So, what are the cheapest combi boilers available in 2025?
In our view, a cheap boiler should be good as well as budget-friendly, and that means the following:
Excellent customer reviews.
Aftercare truly cares when something goes wrong.
A warranty that is as long as possible and not just 2 years as many cheap brands offer.
Technically brilliant and built to last.
Award-winning.
Boiling (not technically, though).
With all those important factors in mind, we selected the following boiler models as part of our "cheap picks":
Want the exact price of a new boiler? Use our boiler quote calculator (your fixed price will appear on the screen).
Alpha Combi Boilers (Best cheap boilers)
Alpha Innovation or simply Alpha boilers are a relatively new brand in the UK's domestic boiler market but has quickly made a name for itself, thanks to its reliability and affordability. Imagine we could expect the same from public transportation, and the world would look a whole lot different.
Made in the heart of Italy and with a headquarters based in Kent, this manufacturer offers a comprehensive range of boilers that on a technical level rival market leaders.
Why else do we think Alpha boilers are a great choice?
Good Homes Magazine Approved
10-year warranty (when purchased via Heatable)
Superior build at an affordable price point
Alpha's 2024 combi boiler range & overviews:
Alpha Model | kW | kW | kW |
- | 28kW | 33kW | |
Alpha E-Tec Plus | 28kW | 33kW | 38kW |
Alpha Evoke | - | 28kW | 33kW |
Alpha E-Tec NX Combi Boiler
Alpha's most popular combi boiler (replacing the Alpha E-Tec)
The Alpha E-Tec NX is the brand's best-selling combi boiler and offers a level of quality that rivals premium manufacturers but at a budget-friendly price point.
For example, they are built with a stainless-steel heat exchanger which is usually something you would only expect in a premium brand.
Alpha offers a warranty of 7 years on their Alpha E Tec NX, but Heatable offers an exclusive 10-year warranty, which also matches some of the premium brands.
Ideal for: Those looking for a high-quality and reliable boiler at an affordable price point. That’s a lot of people.
Are you interested in the Alpha E-Tec NX? Get a fixed price on a brand-new model with gas-safe installation as quickly as tomorrow.
Worcester Bosch Combi Boilers
A giant within the heating industry and probably the UK’s best, most sought-after combi boiler, historically. Although less rare than the famous Penny Black stamp, they’re nearly as much sought-after.
One of three combi boilers with the Which? Best Buy award and you can’t go far wrong with a Worcester.
Why do we think Worcester offers the best cheap combi boilers?
Which? Best Buy Award for 10 years running
10-year guarantee (when purchased via Heatable)
Availability of parts is second to none
Excellent customer reviews and aftercare
Want a new Which? Best Buy boiler with professional installation?
You can see the latest price on Worcester Bosch boilers here.
Worcester 2024 combi boiler range & overviews:
Worcester Model | kW | kW | kW | kW |
- | - | 25kW | 30kW | |
- | - | 25kW | 30kW | |
Worcester Bosch Greenstar Si Compact | - | - | 25kW | 30kW |
Worcester Bosch CDi Classic | 29kW | 34kW | 38kW | 42kW |
- | 28kW | 32kW | 36kW | |
Worcester Bosch CDi Highflow | - | - | 44kW | 55kW |
24kW | - | - | 30kW | |
30kW | 35kW | 40kW | 45kW |
Greenstar 2000 Combi Boiler
The brand's entry-level offering (their best cheap boiler)
The Worcester Bosch 2000 is the brand's entry-level combi boiler and is officially their quietest model to date. Like cats in small boxes, it is designed to fit into small spaces e.g. kitchen cupboards and features easy-to-remove side panels for convenient servicing and maintenance.
Like all of the latest boilers from the brand's updated Greenstar range, the 2000 also benefits from the super sleek, contemporary design and digital interface. It will be the highlight of your cupboard.
Want to know which brands offer the best combi boiler models? Check out our guide, or simply use our calculator to get matched with a budget-friendly boiler that's perfect for your property.
Ideal for: Those looking for an entry-level, super-quiet boiler from an award-winning brand.
Cheap Combi Boiler Warranties
Unfortunately, many people decide to buy a cheap boiler without ever checking the warranty period, but there is often a direct link between the boiler price and the warranty period offered.
A warranty is a contract from the manufacturer that will help you repair the boiler and get it back up and running in the event of a breakdown. It’s easy to see why psychiatrists don’t come with a warranty.
Brands typically start offering warranties at around 2 years, which is very poor and you should ideally try to secure a warranty with the longest length, ideally 10 years. You at least want your boiler covered until it’s fully potty-trained.
Why is it so important? Simply repairs and call-out charges can add up, so you want to know you will be covered by these costs for as long as possible.
That's why when you purchase your new combi boiler installation via Heatable, you will get a 10-year warranty for superior peace of mind.
How can you pay for your new boiler?
If you are on the hunt for a cheap boiler, also referred to as an entry-level boiler, you may be on a tight budget and so discovering that you can pay for your new boiler in monthly instalments may be a new concept for you. It means you can stop hunting, kick up your feet, and do something more fun with your life, like watching spoiled millionaires roll around on a perfectly tended lawn (a pastime recommended by many).
Pay monthly boiler scheme
As the name implies, a pay monthly boiler scheme allows you to pay for your new boiler in monthly instalments.
You may not be aware, but this is fast becoming one of the most popular ways to pay for a new boiler, in fact, the latest industry reports indicate that this is now one of the most popular ways to pay for a new boiler installation.
This trend has a huge advantage for consumers as it means the market is now much more competitive and so more competitive boiler finance deals are available as each tries their best to attract new customers. That’s you. Somebody wants you (to pay them).
Lenders include high street names, prime lenders, and even sub-prime lenders, which are available for individuals with poor credit ratings.
Pay monthly boiler finance plan examples (with our most popular boilers):
Worcester Bosch Greenstar 4000 Boiler Payment Plans:
Fixed prices from £1,780 (get your quote online)
APR | Deposit | Loan Amount | Term | Monthly Payment | Interest | Total Payable | |
9.9% | £0 (0%) | £1,780 | 10 Years | £22.98 | £977.36 | £2,757.36 | |
9.9% | £780 (Max) | £1,000 | 10 Years | £12.91 | £549.09 | £2,329.08 | |
9.9% | £0 (0%) | £1,780 | 3 Years | £56.98 | £271.25 | £2,051.25 | |
9.9% | £780 (Max) | £1,000 | 3 Years | £32.01 | £152.39 | £1,932.39 |
Alpha E-Tec NX Boiler Payment Plans:
Fixed prices from £1,795 (get your quote online)
APR | Deposit | Loan Amount | Term | Monthly Payment | Interest | Total Payable | |
9.9% | £0 (0%) | £1,595 | 10 Years | £20.59 | £875.78 | £2,470.78 | |
9.9% | £595 (Max) | £1,000 | 10 Years | £12.91 | £549.09 | £2,144.08 | |
9.9% | £0 (0%) | £1,595 | 3 Years | £51.06 | £243.06 | £1,838.06 | |
9.9% | £595 (Max) | £1,000 | 3 Years | £32.01 | £152.39 | £1,747.39 |
Next Steps For Your New Boiler Journey:
When planning to install a new boiler for your home, there are several important factors to consider. Make sure to refer to the following guides to help you make informed decisions:
To dive deeper into these topics, head over to our advice section, or check out our YouTube channel to learn more.
Best Cheap Combi Boiler: Conclusion
If you’re aiming to get the best deal on a new boiler, consider getting a quote from us, here’s why:
Gas Safe installation within 24 hours.
Thousands of satisfied customers with an average score of 4.9 on Trustpilot, surpassing the market leader.
Which? Trusted Trader: Heatable is proudly recognised as a Which? Trusted Trader.
Price match guarantee: We will match any like-for-like cheaper quote.
Flexible payment options, including interest-free finance.
Up to 12-year guarantee on selected boilers.
Fixed price guarantee: No hidden costs.
Save your quote and decide later.
Get an instant fixed price on a new boiler, here.
To learn more about boilers, visit our advice section, check out our YouTube channel, or read customer testimonials here.
Heat Happy.
