Choosing a new boiler can feel overwhelming if you are not sure what the different types of boilers are or which one suits your home. At John Wilkinson Heating Services, our Gas Safe engineers help homeowners across Warrington and the North West find the right heating system for their property. This guide explains the main boiler types, fuel options, flue types and how to work out the right size boiler for your home.
Understanding the Main Boiler Types
When people talk about different boiler types, they usually mean one of three systems: combi boilers, system boilers or regular boilers. These are the three types of boilers most commonly installed in UK homes.
Combi Boilers
A combi boiler is the most popular central heating boiler type in the UK. It heats your home and produces hot water directly from the boiler without the need for tanks or cylinders. This makes it ideal for smaller houses, flats and modern properties where space is limited.
Combi boilers provide excellent energy efficiency and quick hot water delivery. A like for like combi swap is usually the simplest installation, especially if your old boiler is already a combi.
Best for: small to medium homes, properties with one bathroom, customers wanting to remove tanks, and straightforward replacements.
System Boilers
A system boiler uses a separate hot water cylinder but does not require a loft tank. It stores hot water so it can supply multiple bathrooms more easily. These boiler types are common in medium to large homes and are a good option if you have higher hot water demand.
System boilers can also be converted to a combi boiler if you want to remove tanks and free up space.
Best for: homes with multiple bathrooms, families with higher hot water usage, larger properties.
Regular or Standard Boilers
Regular boilers are also known as heat only or traditional boilers. They require both a hot water cylinder and a cold water storage tank, usually fitted in the loft. These boilers are found in older homes with existing open vented heating systems.
If your property already has this setup, a regular boiler can be a straightforward replacement. Some customers choose to upgrade to a combi system to remove the tanks and improve efficiency.
Best for: older homes with existing tanks, properties with low water pressure, larger houses with multiple bathrooms.
Fuel Types Explained: Gas, Oil and LPG
The types of gas boiler you can choose vary depending on your fuel supply. Here is a simple breakdown of the main fuel options.
Gas Boilers
Most homes in the North West use natural gas. Gas boilers are efficient, cost effective and compatible with all boiler types including combi, system and regular.
Oil Boilers
Properties that are not connected to the mains gas network can use oil. Oil boilers require an external oil storage tank, but they still provide strong heating performance for rural homes.
LPG Boilers
LPG works in a similar way to natural gas but is stored externally in a tank or bottles. LPG boiler types are popular in countryside locations and holiday homes.
If you are unsure which fuel your current boiler uses, our engineers can help identify it during a free survey.
Understanding Boiler kW Sizes
The power rating of a boiler is measured in kilowatts (kW). Higher kW boilers can heat larger homes and supply more hot water, while lower kW models are suitable for smaller properties.
Best Low kW Boilers for Smaller Homes
A great example is the Worcester Bosch Greenstar 4000 24 kW combi boiler. It is ideal for flats, small terraces and homes with one bathroom. It provides fast hot water delivery while keeping energy bills low.
Best High kW Boilers for Larger Homes
For bigger properties with several bathrooms, the Worcester Bosch Greenstar 8000 is available in 40 and 45 kW outputs. These boilers deliver powerful hot water performance and are perfect for homes with higher demand.
If you are unsure what size boiler you need, our team can calculate the exact kW rating required during your free quote.
Boiler Types for Different Home Setups
Different homes require different central heating boiler types. Here is a quick guide.
- Small Homes and Flats: A lower kW combi boiler is usually best. It takes up little space and provides all the heating and hot water you need.
- Medium Homes: Either a combi or system boiler will work depending on your daily hot water usage.
- Large Homes: System and regular boilers are often more suitable, especially if you need strong hot water flow for multiple bathrooms. High output combis are also an option in some larger properties.
Upgrading or Switching Boiler Types
Many homeowners choose to switch from a system or regular boiler to a combi to free up loft and cupboard space. This type of installation is more involved but offers long term convenience and improved efficiency.
Types of Flues for Boilers
All modern boilers use a flue to expel waste gases safely. The main types of flues for boilers include:
- Horizontal flue which exits through a wall
- Vertical flue which exits through a roof
- Twin flue system for longer or more complicated installations
Our engineers will recommend the correct flue type based on your home.
Frequently Asked Questions
What type of boiler do I have?
You can normally tell by checking if you have tanks or cylinders. No tanks means a combi. A cylinder with no loft tank usually means a system boiler. A cylinder plus a loft tank indicates a regular boiler. Our team can confirm this during a survey.
What are the 3 types of boilers?
The three main boiler types are combi boilers, system boilers and regular boilers.
What type of boiler is best?
The best boiler depends on your home size, number of bathrooms, hot water usage and available space. It also depends on what current boiler type you have in your house already and what type you want going forward. Combi boilers are ideal for smaller homes and system or regular boilers suit larger properties, although there are larger kW combi boilers that suit large homes.
What type of boiler do I need?
Our Gas Safe engineers can assess your property and recommend the best option. We check your water pressure, existing system, property size and heating needs to help you choose the perfect boiler.
Get a new boiler quote from John Wilkinson Heating Services
Need a New Boiler?
If you are thinking about replacing your boiler and want expert advice, John Wilkinson Heating Services is here to help. With over 30 years of experience and Worcester Bosch Diamond Accredited Installer status, we provide professional new boiler installations across Warrington, Cheshire and the North West. Our Gas Safe registered engineers will assess your home, discuss your heating and hot water needs and recommend the best boiler type and kW size for your property.
We also offer flexible boiler finance options to make your new boiler more affordable. This allows you to spread the cost with easy monthly payments instead of paying in full upfront. Many of our customers choose boiler finance to help manage household budgets while still enjoying the comfort and reliability of a brand new A rated energy efficient boiler.
Whether you need a straight combi swap, want to upgrade from a system boiler or are looking for a more powerful model for a larger home, our friendly team is ready to help. Contact John Wilkinson Heating Services today for your free no obligation quote and discover how affordable a new boiler can be.
