If you’re replacing an old boiler or installing one for the first time, you’re probably asking the same question most homeowners across the UK do: which boiler is best? The truth is, there’s no one-size-fits-all answer. The best boiler for your home depends on a range of factors – and here in Exeter and across Devon, our Gas Safe registered engineers find the harder water in many parts of the county is one worth adding to the list. These factors include:
Choosing the Best Boiler for Your Home
If you’re replacing an old boiler or installing one for the first time, you’re probably asking the same question most homeowners do: which boiler is best?
The truth is, there’s no one-size-fits-all answer. The best boiler for your home depends on a range of factors including:
- The size of your home
- The number of bathrooms
- Your hot water usage
- Your current heating setup
- Your energy efficiency goals
- Your budget
This guide breaks down the different types of boilers, the best brands in the UK, and how to choose the right boiler for your property.
The Three Main Types of Boiler
Before we look at specific models, it’s important to understand the three main boiler types:
1. Combi Boilers (Combination Boilers)
Combi boilers are the most popular choice for UK homes. They provide heating and hot water from a single unit, without the need for separate tanks or cylinders.
Best for: Small to medium-sized homes with one bathroom
Pros: Space-saving, energy-efficient, fast hot water on demand
Cons: Not ideal for homes with high hot water usage or multiple bathrooms
2. System Boilers
System boilers require a hot water cylinder (usually in the airing cupboard) but not a cold water tank. They’re ideal for homes that use a lot of hot water.
Best for: Medium to large homes with two or more bathrooms
Pros: Strong water pressure, great for multiple users
Cons: Needs space for the cylinder, not quite as efficient as combis for small households
3. Regular (Conventional) Boilers
These are the traditional style of boiler and require both a hot water cylinder and a cold water storage tank (usually in the loft).
Best for: Larger homes with an older heating system already in place
Pros: Can handle very high hot water demand
Cons: Takes up the most space and is slower to heat water
So, Which Boiler Type Is Best?
| Boiler Type | Best For | Avoid If… |
|---|---|---|
| Combi | Flats and smaller houses with one bathroom | You have more than one shower running at once |
| System | Medium to large households with multiple bathrooms | You have very limited space |
| Regular | Older properties with existing tanks and traditional systems | You want to free up loft or cupboard space |
Still unsure? Our expert engineers can help you assess your home’s layout and needs.
→ Click here to get a free quote and personalised boiler recommendation
The Best Boiler Brands in the UK (2025)
The best boilers are not just efficient — they’re also reliable, durable, and backed by a strong manufacturer warranty.
Here are the most trusted boiler brands in the UK right now:
Worcester Bosch
Often voted the UK’s most reliable boiler brand, Worcester Bosch boilers are efficient, quiet, and backed by long warranties.
Popular model: Worcester Bosch Greenstar 4000
Type: Combi and system
Warranty: Up to 10 years
Best for: Quality-focused homeowners
Vaillant
A German-engineered brand known for innovation and efficiency, Vaillant boilers are a popular choice in modern homes.
Popular model: Vaillant ecoTEC Plus
Type: Combi, system and regular
Warranty: Up to 10 years
Best for: Energy-conscious buyers
Ideal
A British brand offering great value for money without compromising on performance. Ideal boilers are often used by landlords and developers.
Popular model: Ideal Logic+
Type: Combi, system and regular
Warranty: Up to 10 years
Best for: Budget-conscious households
Baxi
Baxi has been manufacturing boilers in the UK for over 150 years. Known for reliability and ease of use.
Popular model: Baxi 800 Combi
Type: Combi and system
Warranty: Up to 10 years
Best for: Simple, dependable heating
Viessmann
Viessmann boilers combine German engineering with sleek design and high efficiency. A rising favourite in the UK market.
Popular model: Vitodens 050-W
Type: Combi and system
Warranty: Up to 10 years
Best for: Modern homes and smart controls
Features to Look for in the Best Boiler
Whether you choose a combi, system or regular boiler, here are some must-have features to ensure you’re getting a quality unit:
- A-rated energy efficiency (90%+)
- Modulating burner (adjusts output to save energy)
- ErP compliance (energy labelling regulations)
- Smart thermostat compatibility
- Quiet operation (especially for kitchens or bedrooms)
- Strong manufacturer warranty
- Trusted installation by Gas Safe engineers
How to Choose the Right Boiler for Your Home
Here’s a quick checklist to help you narrow it down:
- Live in a flat or small house with one bathroom?
Go for a combi boiler. - Live in a medium-sized house with 2+ bathrooms?
A system boiler is likely your best option. - Have a large, traditional home with tanks already in place?
A regular boiler might be the simplest and most cost-effective fit. - Need to save space?
A combi boiler takes up the least room. - Want fast hot water at multiple outlets?
A system boiler offers better pressure than a combi.
How Much Does a New Boiler Cost?
Here’s a rough guide to typical boiler prices, including installation:
| Boiler Type | Estimated Cost (Installed) |
|---|---|
| Combi Boiler | £1,800 – £3,000 |
| System Boiler | £2,000 – £3,500 |
| Regular Boiler | £2,000 – £3,000 |
The final price depends on the model, complexity of installation, and whether you’re changing boiler types.
→ Use our instant quote tool to find out how much a new boiler would cost for your home
FAQs: Which Boiler Is Best?
Can I switch from a regular boiler to a combi?
Yes, but it may involve more complex pipework. Many homeowners switch to free up space and improve efficiency.
What’s the most efficient boiler type?
Condensing combi boilers are typically the most efficient for small to medium homes.
Is it worth getting a smart thermostat?
Yes. Smart controls can help you cut energy use and improve comfort.
Do all new boilers come with a warranty?
Most brands now offer 5–10 year warranties if installed by an approved engineer.
Should I get my boiler serviced annually?
Yes. Regular servicing keeps your boiler efficient, safe, and maintains the warranty.
Conclusion: Which Boiler Is Best?
The best boiler for you depends on your home’s size, hot water usage, and existing system. There’s no universal winner — but there is a right choice for your property.
At Home Exeter, we offer free advice, fixed-price quotes, and installation by experienced, Gas Safe registered engineers.
→ Get your new boiler quote and expert recommendation today
Your perfect boiler is just a click away.
