Vaillant System Boilers
As accredited Vaillant installers, our Gas Safe registered engineers fit the full Vaillant system boiler range and will recommend the right model for your property and heating requirements.
Planning to have a new boiler fitted? Request a free quote today.
What Is a Vaillant System Boiler?
A system boiler, sometimes called a sealed system boiler, heats water and stores it in a cylinder ready for use. It works at mains pressure without needing a cold water storage tank in the loft, which is the key difference between a system boiler and a traditional regular boiler.
Because hot water is stored in the cylinder rather than heated on demand, a system boiler can supply several outlets at the same time without any drop in flow or temperature. That makes it well suited to larger homes with multiple bathrooms where more than one person may need hot water at once.
A system boiler can also work alongside solar thermal panels or other renewable heating systems, making it a practical choice for homeowners looking to reduce their reliance on gas over time. If you are unsure whether a system, combi or regular boiler is right for your home, our engineers will assess the property and advise before any work is booked.
The Vaillant System Boiler Range
Vaillant is one of the UK’s most recognised boiler manufacturers and has consistently been regarded as a leading name in gas heating. Their system boiler range covers three models, each suited to different property sizes and requirements. All are A rated for efficiency.
Vaillant ecoTEC Plus System
The ecoTEC plus remastered is Vaillant’s flagship system boiler, available across a wide range of heating outputs to suit homes of all sizes. It has been remastered with a sleek modern design, improved efficiency and smart connectivity as standard.
Available outputs: 10kW, 15kW, 20kW, 25kW, 30kW and 35kW
Key features:
- A rated efficiency with IoniDetect technology for precise combustion control and reduced wear
- Compatible with myVAILLANT connect internet gateway for smart heating and hot water control
- Can be extended with renewables including solar thermal for even greater efficiency
- Standard 5 year guarantee, extendable to up to 10 years when installed by an accredited myREWARDS installer with the correct filter registered
Which? Recommended Brand for gas boilers
Vaillant ecoTEC Exclusive
The ecoTEC exclusive is Vaillant’s premium system boiler and the only model in the range that is available as a system boiler only. It carries Vaillant’s unique Green iQ mark, which indicates the highest level of energy efficiency, lowest fuel consumption and lowest running costs in the Vaillant range.
What sets the ecoTEC exclusive apart is its ability to adapt itself to always deliver the precise level of heat required. Rather than simply firing at a fixed output, it constantly adjusts to match your home’s heating demand, which reduces waste and keeps running costs down.
Available output: 27kW
Key features:
- Green iQ mark for maximum energy efficiency and lowest running costs
- Adapts output continuously to match your home’s precise heating demand
- Built-in internet module for smart control without additional hardware
- Quiet Mark approved for exceptionally quiet operation
- 85% recyclable by design
- Extendable to up to 10 years guarantee when installed by an accredited myREWARDS installer with the correct filter registered
Vaillant ecoFIT Pure System
The ecoFIT pure is Vaillant’s compact system boiler option, designed to fit into a standard kitchen cupboard. It is lightweight, efficient and available with a rear flue option for flexible positioning. A reliable and practical choice for homes where boiler space is limited but hot water demand is higher than a combi can comfortably meet.
Available outputs: 12kW, 15kW, 18kW and 25kW
Key features:
- A rated for both heating and hot water efficiency
- Powerful aluminium heat exchanger for consistent performance
- Compact cupboard size design with rear flue option available
- Hand-built in Vaillant’s award-winning Derbyshire manufacturing plant
- Standard 2 year guarantee, extendable to up to 10 years with an accredited myREWARDS installer and correct filter
The ecoFIT pure is also available as a combi and regular boiler. Visit our Vaillant combi boilers and Vaillant regular boilers pages for more detail.
Vaillant System Boiler Comparison
Not sure which system boiler model suits your home? Here is a quick guide.
ecoTEC Plus | Medium to larger homes | 10kW, 15kW, 20kW, 25kW, 30kW, 35kW | Also available as a combi boiler
ecoTEC Exclusive | Larger homes requiring premium efficiency | 27kW | System boiler only
ecoFIT Pure | Homes with limited boiler space | 12kW, 15kW, 18kW, 25kW | Also available as a combi and regular boiler
Is a Vaillant System Boiler Right for Your Home?
A system boiler works well in many homes, but it is not the right choice for every property. Here is a straightforward guide.
A Vaillant system boiler is likely to be a good fit if:
- The home has two or more bathrooms with regular simultaneous hot water demand
- You want the benefits of stored hot water without loft tanks
- Are replacing an existing system boiler on a like for like basis
- You are considering adding solar thermal in the future
A combi boiler may be a better option if:
- The home has one or two bathrooms with modest hot water demand
- You want to remove the cylinder entirely and free up space
- Your property is smaller and the lower output of a combi suits the heating load
A regular boiler may be a better option if:
- The property already have loft tanks and a cylinder in place that you want to keep
- Are replacing an existing regular or open vent boiler like for like
If you are unsure which type suits your home, our engineers will assess the property and give you honest advice. Visit our main Vaillant boilers page for an overview of all three types, or read our boiler installation guide for more detail.
System Boilers and Wider Heating Systems
One of the practical advantages of a system boiler is how well it works alongside other heating and comfort systems in your home. The Vaillant ecoTEC plus system boiler is compatible with solar thermal panels, which can pre-heat the water in the cylinder and reduce the amount of gas needed to reach the required temperature.
Beyond solar thermal, a system boiler also pairs well with underfloor heating, providing the steady low-temperature output that makes wet underfloor heating systems work at their most efficient. It works equally well alongside air conditioning systems, where the heating and cooling can be managed independently but run from the same central setup.
For homeowners looking to combine reliable gas heating with underfloor heating, air conditioning or renewable technology, a Vaillant system boiler is a strong foundation to build from. Our engineers can advise on the right approach for your property at the time of survey.
Find out more about our renewable energy solutions, underfloor heating and air conditioning installations.
Vaillant System Boiler Guarantees
The ecoTEC plus remastered comes with a standard 5 year guarantee. The ecoFIT pure comes with a standard 2 year guarantee. The ecoTEC exclusive guarantee is extendable to up to 10 years. All three models can reach up to 10 years guarantee when installed by an accredited myREWARDS installer and registered with the correct Vaillant boiler protection kit or filter.
As accredited Vaillant installers, we register your boiler and guarantee directly with Vaillant as part of the installation process.
Boiler costs and finance options
The cost of a new boiler depends on the model, your property and any system upgrades required. We provide clear, fixed quotations following a home survey, so you know exactly what to expect.
Flexible finance options are also available to help spread the cost.
Request a free boiler survey
Recent Plumbing and Heating Case Studies
We carry out boiler installations, heat pumps, bathroom refits, underfloor heating installs, air conditioning and a full range of plumbing and heating work across Buckinghamshire, Berkshire, Surrey, Oxfordshire and West London.
Our case studies show real projects completed by our own engineers, with full details of the work carried out and the products installed.
Browse our latest work to see the standard we deliver on every job.
Hundreds of System Boilers Installed Locally
We have installed hundreds of boilers across Buckinghamshire, Berkshire, West London and the wider South East England area. Our engineers cover locations including High Wycombe, Aylesbury, Beaconsfield, Maidenhead, Windsor, Marlow, Henley-on-Thames, Reading and Uxbridge.
Office | Warehouse: Unit 5, Jacksons Industrial Estate, Wessex Road, Bourne End, High Wycombe, Bucks, SL8 5DT
FAQs – Vaillant System Boilers
We offer a complete range of boiler and heating services across Buckinghamshire, Berkshire, West London, Oxfordshire and surrounding counties. Here are some frequently asked questions about Vaillant System Boilers.
What is the difference between a system boiler and a combi boiler?
A system boiler heats water and stores it in a hot water cylinder ready for use. A combi boiler heats water on demand directly from the mains without a cylinder. A system boiler is better suited to larger homes with multiple bathrooms where several people may need hot water at the same time. A combi is better suited to smaller homes with one or two bathrooms.
What is the difference between a system boiler and a regular boiler?
Both types work with a hot water cylinder. The key difference is that a system boiler has most of its components built in and operates without cold water storage tanks in the loft. A regular boiler requires loft tanks. A system boiler is generally easier to install and takes up less space overall.
What is the Vaillant ecoTEC exclusive and why is it different?
Do I need a powerflush before a new Vaillant system boiler is installed?
Not always, but we recommend one if the existing system is more than a few years old or if there are signs of sludge in the pipework. Fitting a new boiler onto a dirty system causes premature wear and reduces efficiency. We will always assess the system first and advise accordingly. Find out more about our central heating powerflush service.
How long does a Vaillant system boiler installation take?
What guarantee comes with a Vaillant system boiler?
Which areas do you cover for Vaillant regular boiler installations?
We cover High Wycombe, Marlow, Beaconsfield, Maidenhead, Windsor, Henley-on-Thames and the wider Buckinghamshire, Berkshire and South East England area. Visit our areas we cover page for the full list. > Discover the Areas We Cover
A Trusted Family-Run Plumbing and Heating Company Since 1948
We are a family run plumbing and heating company established in 1948. Homeowners and businesses across Buckinghamshire, Berkshire and West London choose us for reliable workmanship, honest advice and a professional approach. >Learn more about our company and award winning team.
✔ Family run business established in 1948
✔ Gas Engineers who live and work locally
✔ Clear advice and costs before work begins
✔ Payment only once the job is complete
All contact with Red Van plumbers has been a pleasure everyone I have spoken to were extremely helpful and pleasant and the engineers all did a great job without any mess, thank you very much.
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Get a Free Vaillant Boiler Quote
If you are considering a boiler replacement for your home or business, we offer free consultations and clear guidance on the best boiler options.
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