System Boiler Costs/Prices UK

System Boiler Costs/Prices UK

How much does a new system boiler cost, along with Gas Safe installation? Here we explain the factors involved, along with average costs.

Thinking About Installing a System Boiler?

You’re in the right place! With thousands of installations completed nationwide, we have the expertise you need.

In this guide, we’ll delve into the potential costs of installing a new system boiler and examine the average running costs you can expect.

Let’s get started!

PS - we fit new system boilers with gas safe installation nationwide. Simply answer these questions, get your fixed price and you could get it installed as quick as tomorrow.

What is a System Boiler?

System boilers, unlike combi boilers, come with a separate unvented hot water storage cylinder allowing the system to supply hot water continually throughout a property.

This is in contrast to combi boilers, which can only offer hot water on demand.

Given how system boilers work, they are well suited to larger properties with a high heating and hot water demand.

The average system boiler is somewhat more expensive to install than a combi boiler.

Cost of Installing a System Boiler in the UK

It is likely to cost somewhere in the region of £1,500 to £3,000 to have a system boiler installed.

This would factor in both the price of labour and the standalone cost of the boiler unit. Some additional expenses may apply.

Of course, how much you’d actually pay for a system boiler will depend on a whole host of factors.

The most important cost factor is the standalone price of the system boiler itself.

Of course, the higher the output or/and the quality of the boiler, the more expensive it is likely to be.

However, beyond that, the total cost of having a system boiler installed would also be shaped by the ease of installation, your property location and whether or not you are converting from one type of boiler to another (e.g., combi to system boiler) or you’re looking for a like-for-like replacement.

The reason that the location of your property can shape the cost of installation is that labour prices differ across the UK.

Labour prices tend to be below average in northern England, Scotland and Northern Ireland whereas they tend to be above average in the southeast of England.

Cost of Popular System Boilers

Some of the best brands worth considering if you want to have a system boiler installed include Worcester Bosch, Ideal, Viessmann and Vaillant.

Here are some of the most popular system boilers on the market and their estimated price tags:

System Boiler Range

Max Central Heating Outputs

Average Installation Cost

Worcester Bosch 4000 System Boiler

12-24kW

£1,780 to £2,400

Viessmann Vitodens 100-W System Boilers

11-32kW

£1,800 to £2,480

Worcester Bosch Greenstar 8000 Life System Gas Boilers

30-35kW

£2,040 to £2,660

Viessmann Vitodens 200-W System Boilers

11-32kW

£2,140 to £2,950

Worcester Bosch Greenstar 8000 Style System Gas Boilers

30-35kW

£2,110 to £2,750

Vaillant ecoTEC plus System Gas Boilers

12.2-37.6kW

£1,700 to £2,840

Ideal Vogue GEN2 System Boilers

15-32kW

£1,780 to £2,570

 

When seeking the right boiler for you, it’s important to set aside a sufficient amount of time to weigh up your options.

You’ll want to look at boilers that match your budget, preferences and the heating and hot water demands of your home.

If in doubt, consult with a qualified heating engineer.

How Much Does It Cost to Run a System Boiler?

The cost of running a system boiler will primarily depend on the fuel source, the power output of the boiler in question and its energy efficiency. 

With prices set by the Energy Price Guarantee, depending on how you pay for your heating, you’d pay around £0.10 per kWh if using natural gas or £0.34 per kWh in the case of electricity.

However, what you’d end up paying per month or annually would depend on the various cost factors mentioned above as well as any other applicable cost factors.

System Boiler Pros and Cons

Now that we’ve explored the potential installation cost and running costs of a system boiler, it’s worth exploring the advantages and disadvantages of this type of boiler.

This will help you to weigh things up if you’re unsure whether to go with a combi, system or heat-only boiler.

Advantages:

  • Can store lots of hot water for a continual supply which is not true of a combi boiler.

  • Use up less space than a heat-only boiler.

  • Great for those with a high heating and hot water demand.

  • Compatible with solar energy power.

  • Offer mains pressure hot water to household taps.

Disadvantages:

  • Generally, less efficient than combi boilers.

  • Use up more space than combi boilers.

  • Tend to be a bit more costly than combi boilers.

  • May provide more power than is needed.

Looking for the best deal on a new System Boiler? 

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.

FAQ's

To narrow it down to one boiler range, we’d suggest the Worcester 4000 System Boilers. As for the specific model, which one you should opt for will depend on the heating and hot water demand of your property. This range consists of a 12kW, 15kW, 18kW, 21kW and 24kW boiler model. It’s important to ensure you go with the correct model for your home.
On average, a modern system boiler should last for about 15 years, so long as it is well-maintained. Of course, the expected longevity of any given boiler will also vary depending on the quality of the boiler model and the reliability of the manufacturer. To increase the chances that your system boiler will go the distance, you should ensure it is serviced once a year. Moreover, it’s best to have your radiators bled at least once per year and your heating system power flushed about once every five years or whenever needed. Beyond that, it’s also important to have any issues with your boiler addressed as soon as possible. Not only is this key from a safety perspective but it can help stop issues from worsening over time.

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Last updated 16 Jul, 2024

Tags: System Boilers, Boilers

Patrick Garner
Written by Patrick Garner

Patrick Garner, a Gas Safe certified engineer, leads the boiler installations team at Heatable. A wealth of experience, he has successfully overseen the installation of thousands of heating systems.

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