How to Choose the Right Boiler for Your Home
Choosing a new boiler is a big decision — it’s an investment that will keep your home warm and your hot water flowing for the next 10-15 years. With so many options available, how do you know which one is right for you?
The Three Main Types of Boiler
Combi Boilers
The most popular choice in UK homes, combi (combination) boilers provide both central heating and hot water on demand — no need for a separate hot water cylinder or cold water tank.
Best for: Small to medium-sized homes with 1-2 bathrooms.
Pros:
- Compact — saves space
- Hot water on demand
- Energy efficient
- Lower installation costs
Cons:
- Can struggle with multiple taps running at once
- Not ideal for homes with high hot water demand
System Boilers
System boilers work with a hot water cylinder but don’t need a cold water tank in the loft. They can supply hot water to multiple taps simultaneously.
Best for: Larger homes with 2+ bathrooms.
Pros:
- Strong water pressure to multiple outlets
- Compatible with solar thermal panels
- No loft tank needed
Cons:
- Requires space for a hot water cylinder
- Hot water can run out (but it reheats relatively quickly)
Heat-Only (Regular) Boilers
Also known as conventional or traditional boilers, these work with both a hot water cylinder and a cold water tank in the loft.
Best for: Older properties with existing traditional heating systems.
Pros:
- Compatible with older radiator systems
- Can supply lots of hot water at once
- Works well with solar thermal
Cons:
- Requires the most space
- More complex installation
What Size Boiler Do You Need?
Boiler size is measured in kilowatts (kW). Here’s a rough guide:
| Home Size | Combi Boiler | System Boiler |
|---|---|---|
| 1-2 bed flat | 24-27 kW | 12-18 kW |
| 3 bed house | 28-34 kW | 18-24 kW |
| 4+ bed house | 35-42 kW | 24-30 kW |
Top Brands We Recommend
We install and service all major brands, but our top recommendations are:
- Worcester Bosch — Excellent reliability, up to 10-year warranty
- Vaillant — German engineering, great energy efficiency
- Baxi — Affordable with solid performance
- Ideal — Good value for money
How Much Does a New Boiler Cost?
Typical installation costs range from £1,800 to £3,500 depending on the boiler type, brand, and complexity of the installation. We always provide a free, detailed quote before any work begins.
Ready for a new boiler? Contact Jon Doe Plumbing for a free, no-obligation quote. We’ll help you choose the right boiler for your home and budget. Call 01234 007007 or fill out our contact form.