Different types of boilers and their benefits

Deciding which type of boiler to buy is an important decision to be made by the homeowners. Some of the first time home buyers are not even aware of the fact that there are many types of boilers available. Each and every boiler type has its own set of benefits and the decision has to be made based on the property type and their requirements. The size of the property also plays an important role in deciding the type of boiler to be purchased. Though there are many kinds of boilers available, we will be discussing in details about the 3 most popular types below.

Combination boilers

As the name implies it has both the water heater and the central heating boiler clubbed in a single unit. Combination boiler or combi boilers doesn’t have a hot water storage cylinder. Since there is no storage cylinder the boiler is compact and also highly efficient. The water heater present in the combi boiler starts heating the water directly from the mains as and when the water is turned on. Since it works on an ad-hoc basis it is highly energy efficient.


  • Since the water is heated directly from the mains and not stored, there is no need for a separate storage tank.
  • The absence of a storage tank makes it really small and is best suited for smaller homes.
  • Highly energy efficient as it heats the water directly from the mains.
  • Since the water is directly heated, you can experience water at mains pressure. Enjoy a powerful shower without extra pumping.
  • Very less pipework which makes installation easier and affordable.

System boilers

Unlike combi boilers, system boilers prefer to store hot water in a cylinder after heating them for future use. Though it requires a cylinder for storage, most of the components are packed inside the boiler unit which makes it compatible with small and medium-sized homes. Though it stores hot water, there is no need of cold water overhead tank which saves space in the roof or loft. What makes them special is that they can be integrated with solar water heating system which is highly eco-friendly. Solar water heating systems are expensive to install but once installed they offer great environmental benefits along with reduced energy bills.


  • It supplies hot water to more than one tap or showers at the same time.
  • No need for an overhead tank which will be a space saver for smaller homes.
  • Highly suitable for properties which have multiple bathrooms.
  • Integration with the solar water heating system is an added benefit.

Conventional boilers

These are the traditional boilers which require both the hot water storage cylinder and also the overhead water tank for feeding the boiler. If you are buying a new property it is strongly advised to avoid these regular boilers. These boilers are suitable for homes which already have a traditional radiator and overhead tank. They are generally huge in size and not recommended for smaller properties.


  • Highly reliable and suitable for homes which has more than 3 bathrooms.
  • Best suited for homes with low water pressure.
  • Possible to integrate with solar water heating systems for environmental benefits.

Reference: https://en.wikipedia.org/wiki/Boiler