There is no single "best" type of boiler that is suitable for every situation, as the choice of boiler will depend on a range of factors, such as the size and layout of your home, your hot water and heating requirements, and your budget. However, here is a brief overview of some of the most common types of boilers and their characteristics:

Combi boilers

A combination boiler, or "combi" boiler, is a compact unit that combines a central heating boiler and a high-efficiency water heater in one. Combi boilers are typically more energy-efficient than other types of boilers, as they heat water on demand and don't require a separate water storage tank. 

Combi boilers are often a good choice for smaller homes with fewer occupants and are available in a wide range of models and outputs. Take a look at some fo the best combi boilers here as reviewed by Boiler Central.  

System boilers

 A system boiler works in conjunction with a separate hot water storage tank to provide hot water and central heating. System boilers are often a good choice for larger homes with higher hot water demand, as they can provide hot water to multiple outlets at the same time.

Conventional boilers

A conventional boiler, also known as a regular or traditional boiler, requires a separate hot water storage tank and is often used in older homes. Conventional boilers can be less energy-efficient than other types of boilers, but they may be a good choice for larger homes with high hot water demand.

Heat-only boilers

A heat-only boiler, also known as a regular or traditional boiler, provides central heating but requires a separate hot water storage tank. Heat-only boilers are often a good choice for homes with multiple bathrooms and high hot water demand.

When choosing a boiler, it's important to consider factors such as the size and layout of your home, your hot water and heating requirements, and your budget, and to consult with a qualified heating engineer or plumber who can help you make an informed decision.

Additionally, choosing a high-efficiency boiler and ensuring that it is properly installed and maintained can help you save money on your energy bills and reduce your carbon footprint.

What are the alternatives to gas boilers?

here are a number of alternatives to gas boilers for home heating and hot water. Here are a few of the most common options:

• Heat pumps: Heat pumps use electricity to extract heat from the air or ground and transfer it to your home, providing both heating and hot water. Heat pumps are highly efficient and can be used in both new and existing homes, but they can be expensive to install.

• Biomass boilers: Biomass boilers burn wood pellets, logs, or other organic materials to provide heating and hot water. Biomass boilers can be a sustainable and cost-effective option for homes with access to a local source of wood fuel.

• Solar thermal systems: Solar thermal systems use energy from the sun to heat water, which can be used for heating and hot water. Solar thermal systems are a renewable and environmentally friendly option, but they can be expensive to install and are most effective in areas with high levels of sunshine.

• District heating systems: District heating systems use a central boiler or other heat source to provide heating and hot water to multiple homes or buildings. District heating systems can be highly efficient and can use a range of low-carbon heat sources, such as geothermal, biomass, or waste heat.

• Electric boilers: Electric boilers use electricity to provide heating and hot water, making them a potentially clean and efficient option if your electricity comes from renewable sources. However, they can be expensive to run if your electricity comes from fossil fuels.

It's important to consider the suitability, costs, and efficiency of each alternative when choosing a heating system for your home. A qualified heating engineer or plumber can help you assess the best options for your specific needs and circumstances.