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

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.

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

MODEL	DIMENSIONS	OUTPUT	MAX FLOW RAT	EFFICIENCY	TYPICAL PRICE
Greenstar i System 15	H - 710 mm W - 400 mm D - 330 mm	15 kw	N/A		£ 938.02
Greenstar 30 CDi Classic System	H - 760 mm W - 400 mm D - 360 mm	30 kw	N/A		£ 1,155.06
GB162 50 System	H - 1414 mm W - 520 mm D - 465 mm	50 kw	N/A		£ 1,975.50
Greenstar Danesmoor 32 System	H - 855 mm W - 370 mm D - 600 mm	32 kw	N/A		£ 2,272.73
Greenstar Danesmoor External 32 System	H - 950 mm W - 565 mm D - 780 mm	32 kw	N/A		£ 2,648.72

Ideal

MODEL	DIMENSIONS	OUTPUT	MAX FLOW RAT	EFFICIENCY	TYPICAL PRICE
Logic System 24	H - 700 mm W - 395 mm D - 278 mm	24 kw	N/A		£ 859.16
Logic Max System 18	H - 700 mm W - 395 mm D - 278 mm	18 kw	N/A		£ 878.60
Logic + System 30	H - 700 mm W - 395 mm D - 278 mm	30 kw	N/A		£ 969.99
Vogue System 32	H - 740 mm W - 445 mm D - 330 mm	32 kw	N/A		£ 1,099.50
Vogue Max System 26	H - 700 mm W - 445 mm D - 330 mm	26 kw	N/A		£ 1,131.83

Biasi

MODEL	DIMENSIONS	OUTPUT	MAX FLOW RAT	EFFICIENCY	TYPICAL PRICE
Riva Plus System ERP 28	H - 803 mm W - 400 mm D - 350 mm	28 kw	N/A		£ 480.00
Advance System 30	H - 700 mm W - 400 mm D - 290 mm	30 kw	N/A		£ 550.00
Inovia System ERP 25	H - 700 mm W - 400 mm D - 290 mm	25 kw	N/A		£ 598.80
Advance Plus System ERP 30	H - 700 mm W - 400 mm D - 290 mm	30 kw	N/A		£ 618.00
Advance Plus 7 System ERP 30	H - 700 mm W - 400 mm D - 290 mm	30 kw	N/A		£ 659.00

Vokera

MODEL	DIMENSIONS	OUTPUT	MAX FLOW RAT	EFFICIENCY	TYPICAL PRICE
Vision System 25	H - 715 mm W - 405 mm D - 248 mm	25 kw	N/A		£ 581.00
Mynute i System 30	H - 780 mm W - 400 mm D - 338 mm	30 kw	N/A		£ 596.00
Mynute 35HE System	H - 780 mm W - 400 mm D - 338 mm	35 kw	N/A		£ 922.91
Evolve System 30	H - 740 mm W - 420 mm D - 275 mm	30 kw	N/A		£ 988.80
Verve System	H - 764 mm W - 553 mm D - 283 mm	47 kw	N/A		£ 1,460.87

Keston

MODEL	DIMENSIONS	OUTPUT	MAX FLOW RAT	EFFICIENCY	TYPICAL PRICE
Keston System S30	H - 700 mm W - 395 mm D - 278 mm	30 kw	N/A		£1,094.79

Ferroli

MODEL	DIMENSIONS	OUTPUT	MAX FLOW RAT	EFFICIENCY	TYPICAL PRICE
Modena 32S HE System	H - 600 mm W - 400 mm D - 320 mm	32 kw	N/A		£ 669.51
Econcept 51A	H - 720 mm W - 630 mm D - 360 mm	50 kw	N/A		£ 1,874.66

Viessmann

MODEL	DIMENSIONS	OUTPUT	MAX FLOW RAT	EFFICIENCY	TYPICAL PRICE
Vitodens 100-W 26 System	H - 700 mm W - 400 mm D - 350 mm	26 kw	N/A		£ 1,049.82
Vitodens 200-W 30 System	H - 850 mm W - 450 mm D - 360 mm	30 kw	N/A		£ 1,519.34

Vaillant

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

Baxi

MODEL	DIMENSIONS	OUTPUT	MAX FLOW RAT	EFFICIENCY	TYPICAL PRICE
Megaflo System 24	H - 780 mm W - 450 mm D - 345 mm	24 kw	N/A		£ 909.62
EcoBlue System 28	H - 700 mm W - 390 mm D - 295 mm	28 kw	N/A		£ 1,069.99

Potterton

MODEL	DIMENSIONS	OUTPUT	MAX FLOW RAT	EFFICIENCY	TYPICAL PRICE
Gold System 28	H - 780 mm W - 450 mm D - 345 mm	28 kw	N/A		£ 609.00
Assure System 18	H - 700 mm W - 390 mm D - 285 mm	18 kw	N/A		£ 802.32
Promax System 24	H - 750 mm W - 450 mm D - 345 mm	24 kw	N/A		£ 913.36
Promax System Plus 32	H - 780 mm W - 450 mm D - 345 mm	32 kw	N/A		£ 985.78
Ultra System 28	H - 626 mm W - 370 mm D - 270 mm	28 kw	N/A		£ 1,250.00

Glow-Worm

MODEL	DIMENSIONS	OUTPUT	MAX FLOW RAT	EFFICIENCY	TYPICAL PRICE
Easicom3 System	H - 740 mm W - 418 mm D - 300 mm	25 kw	N/A		£ 622.74
Ultimate3 System	H - 740 mm W - 418 mm D - 300 mm	25 kw	N/A		£ 820.00
Energy System 30	H - 700 mm W - 390 mm D - 280 mm	30 kw	N/A		£ 833.88

Alpha

MODEL	DIMENSIONS	OUTPUT	MAX FLOW RAT	EFFICIENCY	TYPICAL PRICE
E Tec 30S System	H - 712 mm W - 440 mm D - 255 mm	30 kw	N/A		£ 901.06
Protec Plus System 50	H - 843 mm W - 442 mm D - 457 mm	50 kw	N/A		£ 2,233.14

Ariston

MODEL	DIMENSIONS	OUTPUT	MAX FLOW RAT	EFFICIENCY	TYPICAL PRICE
E-System One 30	H - 745 mm W - 400 mm D - 331 mm	30 kw	N/A		£ 793.95
Clas System One 24	H - 745 mm W - 400 mm D - 331 mm	24 kw	N/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.