ProTech Boilers

System boilers

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System boilers explained

System boilers require a hot water cylinder for storing water, however the major heating and hot water system components are built into the boiler itself, making it quicker and easier to install. 

When space is limited and you need a new boiler that won’t take up too much room, a new system boiler would be ideal as they don’t require tanks. Tanks for other boilers are are usually located in the loft.

Pro's & con's of a system boiler

Every household is different, so each home will have their own central heating requirements. There are a number of advantages of having a system boiler installed into your home, however they may not be suitable for everyone. Here’s a list which in our opinion details some of the pros and cons of system boilers:

  • Great for properties with more than one bathroom
  • Constant supply of hot water to multiple taps at the same time
  • Built-in parts makes the installation quicker and easier
  • No need for a loft tank, freeing up space and eliminating worries about leaks and frozen pipes
  • Economical to run
  • Only heats up water in advance, so effecienctly programming your time controls is important
  • Hot water supply can run out
  • Takes up more area than a combi boiler

Our best selling system boilers

Worcest Combi Boiler
Greenstar CDi System
Ideal Vogue MAX Combi Boiler
Vogue MAX System
Vaillant Combi Boiler
ecoTEC Plus

What size system boiler do i need?

Use our simple tables to size your combi boiler and then find the best system boiler in your size range. We have reviewed boiler models from 9 boiler manufacturers in this comprehensive guide. Sizing a system boiler is a bit more complicated, but we offer help there too. You will of course need to get a heating engineer to visit your property to size it accurately, but this is a good start! How else can we help? We give guidance on buying a new system boiler.

Age of property
pre 1900
1920s-1930s
1950-1980s
1990s
2000 onwards
Insulation levels
Poorly insulated
Some insulation
Moderately insulated
Reasonably insulated
Well insulated
No of bedrooms and bathrooms
1 bed + 1 bath
20kW
20kW
20kW
18kW
18kW
2 bed + 1 bath
24kW
24kW
20kW
20kW
20kW
2 bed + 2 bath
24kW
24kW
20kW
20kW
20kW
3 bed + 1 bath
28kW
28kW
26kW
24kW
24kW
3 bed + 2 bath
28kW
28kW
28kW
24kW
24kW
3 bed + 3 bath
30kW
30kW
30kW
30kW
30kW
4 bed + 1 bath
30kW
30kW
30kW
28kW
28kW
4 bed + 2 bath
32kW
32kW
32kW
30kW
30kW

Which system boiler could be best for you?

Making a decision about which system boiler is best for your home can be a difficult task; especially with all the options to choose from. To help make your decision easier, here’s a list of some popular system boilers:

Model
Series
KW outputs (available)
Warranty Period
Efficiency Rating
Average Price
Ideal
Logic
15, 18, 24, 30
5 Years
A
£749 – £980
Ideal
Logic MAX
15, 18, 24, 30
10 Years
A
£870 – £1115
Worcester Bosch
Greenstar i
12, 15, 18, 24, 30
5-10 Years
A
£920 – £1050
Vaillant
ecoTEC Plus
15, 18, 24, 30
5-10 Years
A
£980 – £1150

How much does a new system boiler cost to install?

The price of a system boiler differs depending on the brand, size, output and maximum flow rate. The more powerful the boiler, the more it’s likely to cost. Rather than trying to cut costs, you’ll need to choose your new boiler based on the requirements of your home.

Price is likely to be an important factor when choosing your new boiler, so it’s best to work out which type will be the most cost effective with regards to installation, as well as in the future. In some cases, installing the same boiler type (e.g. system boiler for system boiler) could be the cheapest option, however this is not always the case, nor is it always the best choice. If you feel like your home could benefit from having another boiler type installed it may be best to switch.

Our free online quote tool is designed to help you find the best boiler for your home. The tool aims to consider factors such as your central heating requirements and budget to provide you with a personalised recommendation for a boiler along with an indicative quote for the cost of installation. Try our free quote tool today or alternatively, give us a call. Our expert team could provide you with the help and advice you need to make the best decision.