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System Boiler Guide: Prices, Pros & Cons and Leading Brands

System boilers are ideal for homes with multiple bathrooms and properties with limited loft space.

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Purchasing and installing a system boiler is never going to be cheap but there are lots of solutions available in a variety of outputs and from different boiler brands. System boiler prices typically range from £480 to £2,800, with the installation costing between £600 and £1,500 depending on the amount of work involved and the time it takes to install the boiler.

Now, this may seem like a lot of money to be investing in a system boiler but you need to remember that installing a new energy-efficient boiler can help to save you money on your fuel bills. The savings that can be made by upgrading to a more economical boiler could actually far outweigh the cost of your new system boiler and the installation.

There are, in fact, many advantages of choosing a system boiler for your home but you need to compare prices in order to find the best deal. Our guide not only enables you to compare brands and their prices but it also explains how system boilers work and the pros and cons to consider before getting one installed.

System Boiler Advantages and Disadvantages

System boilers are a more efficient alternative to regular (conventional) boilers and are a particularly great choice for households with greater hot water demands. While system boilers come with their own set of unique advantages, there are some drawbacks to consider too.

Advantages

Provide hot water to several taps at once: Since system boilers heat water ahead of time and keep the hot water stored in a cylinder, you can use several taps simultaneously without experiencing a sudden drop in water pressure. This also means that system boilers allow you to run more than one shower or bath at the same time, making them ideal for larger homes with en-suites or multiple bathrooms.

Neater and less disruptive installation: System boilers have a built-in pump, expansion vessel and other individual components to allow for a neat and easy installation. The inbuilt components also make servicing and maintenance straightforward.

No need for a loft tank: There is only one external component required when installing a system boiler, which is a hot water storage cylinder (usually found in the airing cupboard). As no cold water tank is needed in the attic, you won’t lose any precious space in your loft (if you have one).

Economical running costs: System boilers use a pump to quickly send hot water to your taps and radiators when requested, ensuring a faster response time and lower running costs.

Compatible with solar water heating systems: Most system boilers are compatible with solar water heating, giving you the opportunity to reduce your carbon footprint and energy bills even further.

Disadvantages

Hot water is not instantly available: As system boilers heat up water in advance, hot water is not immediate. You can, however, use a timer to make sure you have hot water when it is typically required throughout the week. Alternatively, you can turn on your hot water a while before you want to have a bath or shower. A system boiler may not be the best option if you use hot water at different times on different days of the week.

Limited hot water: The amount of hot water that can be supplied is limited to the amount of water your cylinder can store, which means you could run out if you tend to use a lot of hot water at once. If you do run out, you will have to wait for the boiler to produce enough hot water to refill the cylinder in order to have access to hot water again. You also need to make sure your cylinder is well insulated to ensure you don’t waste energy as a result of heat loss.

You lose airing cupboard space: Like we mentioned before, all system boilers need a hot water storage cylinder (or tank) in the airing cupboard so they actually take up more space than combi boilers. But remember, they take up less space than heat only boilers which require bulky tanks in the loft.

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System Boiler Prices

System boiler prices can vary significantly depending on brand, model and size, so it’s important to have a clear idea of how much you are willing to spend on a new boiler. Thankfully, there is a huge range of system boilers available to suit all needs and budgets – but you must remember to factor in the cost of installation as well.

Below are some comparison tables that enable you to compare system models from different boiler brands to give you a better idea of prices. The prices listed include VAT but exclude the cost of installation.

Worcester Bosch

MODELDIMENSIONSOUTPUTMAX FLOW RATEFFICIENCY TYPICAL PRICE
Greenstar i System 15H - 710 mm
W - 400 mm
D - 330 mm
15 kwN/A £ 938.02
Greenstar 30 CDi Classic System H - 760 mm
W - 400 mm
D
- 360 mm
30 kwN/A £ 1,155.06
GB162 50 SystemH - 1414 mm
W - 520 mm
D - 465 mm
50 kwN/A £ 1,975.50
Greenstar Danesmoor 32 SystemH - 855 mm
W - 370 mm
D - 600 mm
32 kwN/A £ 2,272.73
Greenstar Danesmoor External 32 System H - 950 mm
W - 565 mm
D - 780 mm
32 kwN/A £ 2,648.72

Ideal

MODELDIMENSIONSOUTPUTMAX FLOW RATEFFICIENCY TYPICAL PRICE
Logic System 24 H - 700 mm
W - 395 mm
D - 278 mm
24 kwN/A £ 859.16
Logic Max System 18 H - 700 mm
W - 395 mm
D - 278 mm
18 kwN/A £ 878.60
Logic + System 30H - 700 mm
W - 395 mm
D - 278 mm
30 kwN/A £ 969.99
Vogue System 32H - 740 mm
W - 445 mm
D - 330 mm
32 kwN/A £ 1,099.50
Vogue Max System 26H - 700 mm
W - 445 mm
D - 330 mm
26 kwN/A £ 1,131.83

Biasi

MODELDIMENSIONSOUTPUTMAX FLOW RATEFFICIENCY TYPICAL PRICE
Riva Plus System ERP 28H - 803 mm
W - 400 mm
D - 350 mm
28 kwN/A £ 480.00
Advance System 30H - 700 mm
W - 400 mm
D - 290 mm
30 kwN/A £ 550.00
Inovia System ERP 25H - 700 mm
W - 400 mm
D - 290 mm
25 kwN/A£ 598.80
Advance Plus System ERP 30H - 700 mm
W - 400 mm
D - 290 mm
30 kwN/A £ 618.00
Advance Plus 7 System ERP 30H - 700 mm
W - 400 mm
D - 290 mm
30 kwN/A £ 659.00

Vokera

MODELDIMENSIONSOUTPUTMAX FLOW RATEFFICIENCY TYPICAL PRICE
Vision System 25 H - 715 mm
W - 405 mm
D - 248 mm
25 kwN/A £ 581.00
Mynute i System 30 H - 780 mm
W - 400 mm
D - 338 mm
30 kwN/A £ 596.00
Mynute 35HE System H - 780 mm
W - 400 mm
D - 338 mm
35 kwN/A £ 922.91
Evolve System 30H - 740 mm
W - 420 mm
D - 275 mm
30 kwN/A £ 988.80
Verve System H - 764 mm
W - 553 mm
D - 283 mm
47 kwN/A £ 1,460.87

Keston

MODELDIMENSIONSOUTPUTMAX FLOW RATEFFICIENCY TYPICAL PRICE
Keston System S30H - 700 mm
W - 395 mm
D - 278 mm
30 kwN/A£1,094.79

Ferroli

MODELDIMENSIONSOUTPUTMAX FLOW RATEFFICIENCY TYPICAL PRICE
Modena 32S HE SystemH - 600 mm
W - 400 mm
D - 320 mm
32 kwN/A£ 669.51
Econcept 51A H - 720 mm
W - 630 mm
D - 360 mm
50 kwN/A £ 1,874.66

Viessmann

MODELDIMENSIONSOUTPUTMAX FLOW RATEFFICIENCY TYPICAL PRICE
Vitodens 100-W 26 SystemH - 700 mm
W - 400 mm
D - 350 mm
26 kwN/A £ 1,049.82
Vitodens 200-W 30 System H - 850 mm
W - 450 mm
D - 360 mm
30 kwN/A £ 1,519.34

Vaillant

MODELDIMENSIONSOUTPUTMAX FLOW RATEFFICIENCY TYPICAL PRICE
ecoTEC Plus System 18H - 720 mm
W - 440 mm
D - 338 mm
18 kwN/A£ 934.80
ecoFIT Pure System 25 H - 700 mm
W - 390 mm
D - 295 mm
25 kwN/A £ 1,115.90
ecoTEC Exclusive Green iQ System H - 720 mm
W - 440 mm
D - 338 mm
27 kwN/A £ 1,310.40
ecoTEC Plus High Output System 48H - 720 mm
W - 440 mm
D - 405 mm
48 kwN/A £ 2,187.35
ecoTEC High Output System 65H - 800 mm
W - 480 mm
D - 450 mm
65 kwN/A £ 2,799.15

Baxi

MODELDIMENSIONSOUTPUTMAX FLOW RATEFFICIENCY TYPICAL PRICE
Megaflo System 24H - 780 mm
W - 450 mm
D - 345 mm
24 kwN/A£ 909.62
EcoBlue System 28H - 700 mm
W - 390 mm
D - 295 mm
28 kwN/A£ 1,069.99

Potterton

MODELDIMENSIONSOUTPUTMAX FLOW RATEFFICIENCY TYPICAL PRICE
Gold System 28H - 780 mm
W - 450 mm
D - 345 mm
28 kwN/A£ 609.00
Assure System 18H - 700 mm
W - 390 mm
D - 285 mm
18 kwN/A£ 802.32
Promax System 24H - 750 mm
W - 450 mm
D - 345 mm
24 kwN/A£ 913.36
Promax System Plus 32H - 780 mm
W - 450 mm
D - 345 mm
32 kwN/A£ 985.78
Ultra System 28H - 626 mm
W - 370 mm
D - 270 mm
28 kwN/A£ 1,250.00

Glow-Worm

MODELDIMENSIONSOUTPUTMAX FLOW RATEFFICIENCY TYPICAL PRICE
Easicom3 SystemH - 740 mm
W - 418 mm
D - 300 mm
25 kwN/A£ 622.74
Ultimate3 SystemH - 740 mm
W - 418 mm
D - 300 mm
25 kwN/A £ 820.00
Energy System 30H - 700 mm
W - 390 mm
D - 280 mm
30 kwN/A£ 833.88

Alpha

MODELDIMENSIONSOUTPUTMAX FLOW RATEFFICIENCY TYPICAL PRICE
E Tec 30S System H - 712 mm
W - 440 mm
D - 255 mm
30 kwN/A£ 901.06
Protec Plus System 50H - 843 mm
W - 442 mm
D - 457 mm
50 kwN/A£ 2,233.14

Ariston

MODELDIMENSIONSOUTPUTMAX FLOW RATEFFICIENCY TYPICAL PRICE
E-System One 30H - 745 mm
W - 400 mm
D - 331 mm
30 kwN/A£ 793.95
Clas System One 24H - 745 mm
W - 400 mm
D - 331 mm
24 kwN/A£ 990.95

Don’t forget: Prior to making any decisions, you must ask a Gas Safe engineer to help you determine which system boiler model and size is right for your home.

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