Combi Boiler Prices 2023 Written by Jonathan Whiting Published on 18 May 2018 ✔ Combi boiler prices range from £500 to £2,500, excluding installation✔ Getting your combi boiler installed costs between £500 and £1,500✔ Fill in the form above to receive free boiler quotes from professional installersConsidering the cost of a new boiler? Combi boilers are a great option for homeowners in smaller properties and fewer people living in the house. They can also be powered by electricity, making them perfect for people who want to cut their household emissions and move away from fossil fuels.Not sure what the difference between a combi boiler and a conventional boiler is? You're certainly not alone. But it's not as complicated as it seems.We will guide you through the ins and outs of combi boilers and why – or why not – you should pick them in this article.If you're ready to start comparing boiler prices, simply fill in this form and you'll receive free quotes. In This Combi Boiler Guide:01| Combi Boiler Prices in the UK02| Combi Boiler Prices by Brand03| Combi Boiler Installation Cost04| Combi Boiler Service Cost05| How Does a Combi Boiler Work?06| FAQs07| What's next?Combi Boiler Prices in the UKCombi boiler prices will vary according to a number of factors, such as brand, model, efficiency rating, and power output.The cheapest of combi boilers cost around £500, while top-of-the-range combi boilers can cost as much as £2,500.Plus, there's also the price of installation to consider.For example, a Potterton Promax FSB 30 HE floor-standing combi boiler, which has an energy output of 30 kW, normally costs around £700.A Worcester Bosch Greenstar Highflow 550CDi, on the other hand, delivers an output of 41 kW and is priced at approximately £1,900.The former is ideal for a medium-size house with up to 15 radiators, while the latter will suit a larger property that has as many as five bedrooms.The amount you pay will also depend on whether you choose a gas or oil combi boiler. Liquid Petroleum Gas (LPG) and electric combi boilers are available, too.Oil boilers are typically more expensive than their gas counterparts and are usually favoured by homeowners living in more remote parts of the country (i.e. off-grid living).This table gives you rough overall costs for combi boilers based on their output and fuel type:Property SizeNo. of BedroomsNo. of BathroomsNo. of RadiatorsOutputPrice Range (Gas)Price Range (Oil)Small1 to 2110 max.24kW to 27kW£425 to £2,990£1,600 to £3,700Medium3 to 4Up to 215 max.28kW to 34kW£555 to £2,750£2,460 to £2,600Large4+2+20 max.35kW to 42kW£765 to £1,430£2,330 to £2,925Combi Boiler Prices by BrandThere are several boiler brands to choose from in the UK. Below, you'll find prices for eight of the most popular manufacturers.The examples given include the cheapest and the most expensive combi boilers produced by each brand, and are sourced from PlumbNation.Baxi Combi Boiler PricesModelFuel TypeOutputWarrantyEfficiencyTypical Price124 CombiGas24kW2 years89.1%£614Platinum Combi 40Gas40kW10 years88.9%£1,410Glow-worm Combi Boiler PricesModelFuel TypeOutputWarrantyEfficiencyTypical PriceEasicom 24Gas24kW3 years86 to 90%£614Energy 35 StoreGas35kW2 years93%£1,605Grant Combi Boiler PricesModelFuel TypeOutputWarrantyEfficiencyTypical PriceVortex BlueOil21kW2 years90.8%£1,283Vortex Pro External 36Oil36kW2 years94.6%£2,501Ideal Combi Boiler PricesModelFuel TypeOutputWarrantyEfficiencyTypical PriceLogic Combi 24Gas24kW2 years94%£792Logic Code Combi ES 38Gas38kW2 years94%£1,519Potterton Combi Boiler PricesModelFuel TypeOutputWarrantyEfficiencyTypical PriceAssure 25Gas25kW2 years93%£797Assure 36Gas40kW2 years93%£1,408Vaillant Combi Boiler PricesModelFuel TypeOutputWarrantyEfficiencyTypical PriceecoTEC Pro 28Gas28kW2 years90%£1,113ecoTEC Exclusive 838Gas38kW5 years90%£1,408Viessmann Combi Boiler PricesModelFuel TypeOutputWarrantyEfficiencyTypical PriceVitodens 050-WGas29kW3 years97.6%£742Vitodens 200-WGas32kW3 years98%£1,702Worcester Bosch Combi Boiler PricesModelFuel TypeOutputWarrantyEfficiencyTypical PriceGreenstar 2000Gas24kW5 years93%£779Greenstar Highflow 550CDiGas30kW5 years92%£2,471Combi Boiler Installation CostWhen choosing your combi boiler, it's also important to plan for your installation. Cost is of course a factor, but don't be fooled into thinking that you should do it yourself.Use the services of an accredited installer (a Gas Safe-registered engineer for an LPG or gas boiler, and an OFTEC-registered engineer for an oil boiler). It's an absolute must.A registered engineer will install your new combi boiler with minimum disruption and provide you with all the necessary documentation, including service records.It's also worth thinking about investing in boiler cover, which will protect you against breakdown, at the very least.Average cost of replacing a combi boiler: £3,000Average cost of replacing a different type of boiler with a combi: £3,600For no-obligation quotes tailored to your needs, complete this form and get the best service around from trusted local installers.Combi Boiler Service CostAnnual servicing by a qualified engineer is just as important as ensuring that your combi boiler has been fitted by a registered installer.Servicing prices will vary according to the type of coverage you require, and many people will choose a boiler cover to take care of this. For example, you can choose to cover the cost of the boiler – or the boiler and central heating.You may also want to opt for comprehensive cover, which includes boiler, central heating, plumbing and wiring.Bearing these points in mind, and the variety of prices set by different companies, servicing cover costs can begin at £60 and peak at around £120.Of course, the more components you want to have covered, the greater the cost. This can be as little as £4.95 per month, and as much as £16.90 per month.It's also worth bearing in mind that you will likely be liable for a call-out fee for any boiler-related issues not covered by your service plan. Or, if all elements are covered, call-outs will normally be included.You can read more about boiler servicing costs here.How Does a Combi Boiler Work?The ‘combi' part of this boiler's name is an abbreviation of ‘combination', and comes from its ability to efficiently deliver hot water to kitchens, bathrooms and radiators. It provides both water heating and central heating, all in one innovative machine.Water is heated directly from the mains, so there's no need for an additional water storage cylinder (or a cold-water storage tank), which is typically installed in a property's roof or loft space. Did You Know? In recent years, the popularity of combi boilers in the UK has grown significantly.Now, more than 70% of homes opt for a combi boiler, as opposed to a conventional boilerA major factor in the current popularity of combis is efficiency. Replacing an older boiler with a combi means it's possible to make savings of up to £350 per year on energy bills – not something to be sniffed at.Read our comprehensive combi boilers guide to discover the pros and cons, different system sizes, and whether to opt for electric, gas or oil.FAQsWhich is the best combi boiler to buy?The best combi boilers to buy are:Grant Vortex Pro Internal Combi 21e: £2,060Ideal Vogue Combi 32: £1,090Vaillant ecoTEC plus 838: £1,330Viessmann Vitodens 100-W Combi 30kW: £960Worcester-Bosch Greenstar Highflow 440 CDi ErP: £1,900We recommend buying a combi boiler from Grant, Ideal, Vaillant, Viessmann, or Worcester Bosch. These brands make high quality combi boilers that have been praised by both homeowners and boiler engineers for their reliability and performance.Can you buy a combi boiler on finance?Yes, you can. If you don’t have the money to to buy a new combi boiler upfront, many installation companies offer a variety of finance options that allow you to spread the cost over a series of monthly payments, usually over the course of 12 to 36 months.Interest is often added to the amount you pay back, however, meaning you’ll end up paying more for your combi boiler on finance than it’s actually worth.How much can you save with a new combi boiler?You can save hundreds of pounds on your energy bill every year by updating from a G-rated combi boiler to a new A-rated combi boiler.For example, a semi-detached house can save up to £350 every year, while a detached house can save up to £570 a year. Most households will break-even on their new combi boiler within eight years.How long should a combi boiler last?A combi boiler should last up to 15 years before it needs replacing. If your combi boiler is approaching this age, you should think about investing in a new one.To keep your combi boiler in a good condition for as long as possible, you should have it serviced at least once a year. This will ensure it’s working properly and safely, and will help to avoid any breakdowns.What's next?After reading this, you should feel more like a combi boiler expert.If, in your expert opinion, you think your boiler needs a little sprucing up, it's time to head over to our short form.Once you've done this, our local professional installers will get in touch with free boiler quotes. Happy heating! Written by: Jonathan Whiting An eco hero with a head for numbers, Jon's data visualisation skills are legendary. Whether it's determining what countries will survive climate change or the animals most at risk from it, he has the planet's best interests at heart.