A combi boiler could be the ideal heating solution for your home, especially if you want to free up space, enjoy instant hot water, and keep installation costs down. At Paul Caton Gas Services, we’ve installed thousands of combi boilers, and we’re here to explain why they’re one of the most popular choices for modern homes.

What Is a Combi Boiler?
A combi boiler (combination boiler) does two jobs in one: it heats your central heating system and provides hot water on demand, all from a single, compact unit. There’s no need for a separate hot water tank or cold water tank in your loft.
When you turn on a tap, the boiler instantly heats water from the mains supply. When you want heating, it switches to heating your radiators. Simple, efficient, and clever.
Why Are Combi Boilers So Popular?
Space-Saving Design This is the biggest advantage. Without needing tanks in your loft or an airing cupboard, you reclaim valuable storage space. For smaller homes and flats where every square foot counts, a combi is a game-changer.
Instant Hot Water No waiting for a tank to heat up. Turn on the tap and hot water flows immediately. This is especially convenient for busy families and modern lifestyles.
Energy Efficient Combi boilers only heat water when you need it, which means less wasted energy. Modern A-rated combi boilers can cut your bills significantly compared to older systems.
Lower Installation Costs Because there’s no need to fit tanks or complex pipework, installation is often more straightforward and less expensive than system or conventional boilers.
Easy to Maintain Fewer components mean fewer things to go wrong. Regular servicing is simple, and our engineers know these systems inside out.
Ideal for Smaller Homes and Flats If you live in a typical semi-detached, terraced home, or flat with one or two bathrooms, a combi is often the perfect fit.
Is a Combi Boiler Right for Your Home?
Combi boilers work brilliantly if you:
- Have one or two bathrooms
- Live in a smaller home or flat
- Want to free up loft and airing cupboard space
- Don’t have extremely high hot water demand
- Want lower installation costs
- Like the simplicity of an all-in-one system
They’re less ideal if you have three plus bathrooms and multiple people needing hot water simultaneously (in which case a system boiler might be better), or if you have very low mains water pressure.
Our engineers will discuss your needs during a free survey and recommend whether a combi is your best option.
Our Combi Boiler Installation Service
At Paul Caton Gas Services, we handle everything from start to finish, with professionalism and attention to detail.
- Free Survey We visit your home, assess your heating needs, check your water pressure and existing pipework, and discuss which combi boiler suits you best.
- Detailed Quote You’ll receive a transparent, itemised quote with no hidden charges. We’ll explain what’s included and discuss finance options.
- Expert Installation Our Gas Safe registered engineers will remove your old boiler, install your new combi to the highest standards, and ensure everything is correctly connected and tested. Most installations take one working day.
- Full Commissioning We’ll commission your new boiler, show you how to use all the controls and features, and provide all paperwork and documentation.
- Warranty Registration Your boiler is fully registered with the manufacturer, so you benefit from the full warranty (typically 5-10 years depending on the model).
- Ongoing Support After installation, we’re here for annual servicing, repairs, and maintenance plans to keep your boiler running at peak efficiency.
Combi Boiler Brands We Install
We’re accredited installers for all the leading manufacturers:
- Worcester Bosch – Renowned for reliability and efficiency. Our most popular choice.
- Vaillant – Premium German engineering with excellent performance.
- Baxi – Great value with solid reliability.
- Ideal Heating – Reliable and affordable option.
Each brand offers a range of models at different price points, so we can find something to suit your budget and needs.
Cost of Combi Boiler Installation
The cost depends on several factors:
- Which brand and model you choose
- Your existing pipework and how much needs upgrading
- Whether you need to remove an old boiler
- Any additional work like moving pipework
Typically, combi boiler installation in Chesterfield ranges from £1,500 to £3,500+ depending on the above factors. We’ll give you an exact figure after our free survey.
We offer 0% interest finance options from 2 to 10 years, so you can spread the cost and enjoy your new boiler straight away.
Combi vs. System Boilers: Quick Comparison
Combi Boilers
- No separate hot water tank
- Best for 1-2 bathrooms
- Lower installation cost
- Space-saving
- Instant hot water
System Boilers
- Work with a separate hot water cylinder
- Better for 2 plus bathrooms with high demand
- Consistent pressure even with simultaneous use
- Higher installation cost
- More traditional approach
Our engineers will discuss both during your survey and recommend what’s best for you.
Frequently Asked Questions
Can a combi boiler handle multiple taps running at once? Yes, but with combi boilers, if multiple hot water outlets are running simultaneously, you may notice slightly reduced flow. This is rarely an issue for 1-2 bathroom homes. If you need maximum pressure for multiple bathrooms, a system boiler might be better.
How long does installation take? Usually one working day. We’ll give you an exact timeframe when we visit.
What warranty do I get with a new combi? Typically 5-10 years depending on the brand and model. Extended warranties are often available.
Do I need Planning Permission or Building Regulations approval? You don’t need planning permission, but building regulations notification is required. We handle all paperwork.
What’s the difference between a combi and a conventional boiler? A combi heats water on demand from the mains. A conventional boiler heats water stored in a tank. Combis are more efficient and space-saving.
How often should I service my combi boiler? We recommend annual servicing to maintain efficiency and your warranty. We can arrange this when you book your installation.
Will a new combi boiler reduce my energy bills? If your current boiler is old, absolutely. A modern A-rated combi can save 20-30% on energy bills. They only heat water when needed, so you’re not wasting energy.
What if I’m not sure whether a combi is right for me? That’s exactly what our free survey is for. We’ll assess your home, discuss your needs, and recommend the best option. No pressure to proceed.
Why Choose Paul Caton for Your Combi Installation?
With over 25 years in the heating industry, we’ve installed thousands of combi boilers and know these systems inside out. Our Gas Safe engineers are friendly, professional, and take pride in a job done right. Much of our work comes through word of mouth, a testament to our service quality and customer care.
We serve customers throughout Bolsover, Shirebrook, Tibshelf, South Normanton, Clay Cross, Chesterfield, Derbyshire, and Nottinghamshire, including surrounding areas.
Ready to Install a Combi Boiler?
Get a free, no-obligation quote today. Our friendly team will visit your home, assess your needs, and provide a detailed estimate with no hidden costs.
Call 01246 854 668 or 07976 839 052
Or request a callback and we’ll be in touch within 24 hours.
Paul Caton Gas Services – Over 25 years of trusted combi boiler installation expertise.