System boiler prices start from around £500 and range up to around £2,500. This doesn’t include installation or the hot water tank which a system boiler needs to work.
If you already have a hot water tank that’s great. If you don’t you will need to add this to any new boiler installation costs.
System Boiler Prices – Should you buy one?
In this guide, we’re going to focus on the system boiler. We’ll provide you with a quick reminder of the pros and cons of this type of heating solution.
Then we’re going to provide you with a comprehensive list of system boiler prices from all the main manufacturers. Now you have all the information you need, all in one place.
All types of boilers have some pros and cons so it’s important to be aware of what they are and to be able to balance them out with your requirements, and then we’ll look at new boiler cost further down the page. If you can’t afford a system boiler installation outright, you can always check out boilers on finance to spread the cost of your boiler.
System Boilers Pros
A system boiler can cope when you need hot water from more than one tap at a time. This is because the hot water has already been heated and is currently stored in the hot water cylinder.
Unlike a regular heating system, there’s no need for a cold-water tank because the system boiler is able to pull its supply directly from the mains.
A system boiler has a built-in pump which means that it can pull water from the hot water cylinder and quickly deliver it to wherever you need it. That means no waiting around while the water heats up.
If you’re looking to reduce your carbon footprint, then solar power systems are compatible with a system boiler. The perfect way to reduce your energy bill while also reducing the impact on the environment. All system boilers are condensing to are highly efficient.
System Boiler Cons
Hot water is stored in the tank and so if you need a lot of hot water, all at the same time, then you may need to wait until the tanks is refilled before you have a supply of hot water once again.
System boilers work best when your hot water usage has some routine or predictability. This then allows the use of a timer to ensure that you have a full tank of hot water to call on when needed.
System boilers take up space with their need for a hot water cylinder.
It’s essential to ensure that the hot water cylinder is well insulated to prevent the water from cooling down too quickly. Even then, there will be some loss of heat during storage.
With more parts to the system, then it could be argued that there is a greater potential for things to go wrong. That then means that you may need to plan for higher maintenance costs when compared to a combination boiler. If you no longer have a valid warranty, then we strongly suggest taking a look at boiler cover plans to give you peace of mind and to avoid hefty and unexpected repair bills.
A system boiler needs a water supply with a decent level of pressure and so they’re probably not going to be a good choice for areas with a low water pressure. You may also find that you need to upgrade your radiators to cope with the high-water pressure once the water has been heated.
A few thoughts on prices and warranties. The warranties that we’ve listed are all the maximum length of time that’s available, so that means that there may be some qualifying criteria. This might include:
Having the boiler installed by the manufacturer’s engineers
Registering the warranty within a certain period after installation
Ensuring that the boiler is serviced on an annual basis
The fitting of a specific filter or adaption
On the pricing, these are guide prices that we’ve identified through our research. But you may find that you can get special offers and promotions to reduce the price further, especially when you buy as a fixed price package with installation included.
If you want to replace back boiler and you already have a hot water tank, then system boilers can be linked up to this if the hot water cylinder is suitable for use.
You will have to move your actual boiler to somewhere more appropriate in your home but the savings you will be making will be worth it. Most system boilers can also be used in conjunction with a smart thermostat too to help keep energy bills down.
If you have an older system or require a bit of backup, you can also use immersion heaters with system boilers which can be placed in a hot water cylinder to aid the heating of the hot water. These can help in rural parts of the country too if gas or oil boilers are intermittent.
Warmflow Agentis Pro Internal System 21kW Oil Boiler
5 years
£1,815
Warmflow Agentis Pro Internal System 26kW Oil Boiler
5 years
£1,880
Warmflow Agentis Pro Internal System 26kW Oil Boiler
5 years
£1,935
Warmflow Agentis Pro External System 21kW Oil Boiler
5 years
£1,799
Warmflow Agentis Pro External System 26kW Oil Boiler
5 years
£2,100
Warmflow Agentis Pro External System 33kW Oil Boiler
5 years
£2,495
Worcester Bosch System Boilers Prices
Boiler Model
Warranty
Guide Price
Worcester Bosch Greenstar 8000 Style 30kW System Gas Boiler
12 years
£1,320
Worcester Bosch Greenstar 8000 Style 35kW System Gas boiler
12 years
£1,440
Worcester Bosch Greenstar 8000 Life 30kW System Gas Boiler
12 years
£1,230
Worcester Bosch Greenstar 8000 Life 35kW System Gas Boiler
12 years
£1,350
Worcester Bosch Greenstar 24i System Gas Boiler
7 years
£1,070
Worcester Bosch Greenstar 12i System Gas Boiler
7 years
£899
Worcester Bosch Greenstar 9i System Gas Boiler
8 years
£895
Worcester Bosch Greenstar 15i System Gas Boiler
7 years
£970
Worcester Bosch Greenstar 18i System Gas Boiler
7 years
£1,025
Worcester Bosch Greenstar 21i System Gas Boiler
7 years
£1,029
Worcester Bosch Greenstar 27i System Gas Boiler
7 years
£1,060
Worcester Bosch Greenstar 30i System Gas Boiler
7 years
£1,110
Worcester Bosch GB162 50kW System Gas Boiler
2 years
£2,215
Worcester Bosch GB162 65kW System Gas Boiler
2 years
£2,645
Worcester Bosch GB162 85kW System Gas Boiler
2 years
£3,500
Worcester Bosch GB162 100kW System Gas Boiler
2 years
£3,830
Worcester Bosch Greenstar Danesmoor 12/18 System Oil Boiler
2 years
£1,759
Worcester Bosch Greenstar Danesmoor 18/25 System Oil Boiler
5 years
£1,890
Worcester Bosch Greenstar Danesmoor 25/32 System Oil Boiler
5 years
£2,210
Worcester Bosch Greenstar Danesmoor Utility 12/18 System Oil Boiler
5 years
£1,735
Worcester Bosch Greenstar Danesmoor Utility 18/25 System Oil Boiler
5 years
£1,810
Worcester Bosch Greenstar Danesmoor Utility 25/32 System Oil Boiler
5 years
£2,199
Worcester Bosch Greenstar Danesmoor External 12/18 System Oil Boiler
5 years
£2,140
Worcester Bosch Greenstar Danesmoor External 18/25 System Oil Boiler
2 years
£2,295
Worcester Bosch Greenstar Danesmoor External 25/32 System Oil Boiler
Up to 5 years
£2,650
Worcester Bosch Greenstar 4000 12kW System Gas Boiler
10 years
£970
Worcester Bosch Greenstar 4000 15 kW System Gas Boiler
10 years
£999
Worcester Bosch Greenstar 4000 18kW System Gas Boiler
10 years
£1,095
Worcester Bosch Greenstar 4000 21kW System Gas Boiler
10 years
£1,045
Worcester Bosch Greenstar 4000 24kW System Gas Boiler
10 years
£1,095
New system boilers price summary
Here at New Boiler Costs, we like to compare all the best manufacturers, so if you’re looking for a certain make or model or just browsing, check out our other pages for Viessmann, Worcester Bosch, Baxi, Ideal, Vokera, Vaillant, Alpha, Potterton & more. You can always click get a quote to get recommended combi boilers, system boilers and regular boilers suited to your home. We can even find you prices for oil boilers & electric boilers
get a fixed price quote now with Boiler Central to get a great price on your next system boiler.
