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A Comprehensive Guide to Different Types of Boilers

Boilers are a critical component of any heating system, providing warmth and hot water for residential and commercial properties. Over the years, various types of boilers have been developed to cater to different needs and preferences. In this detailed post, we will explore the most common types of boilers, their pros and cons, as well as how each type works.

  1. Combi Boilers:

Functionality: Combi boilers, short for combination boilers, are compact and highly efficient. They provide both central heating and hot water on demand, without the need for a separate water tank or cylinder. Combi boilers directly heat water from the mains supply whenever a hot water tap is turned on.


  • Space-saving design; no need for additional water tanks.
  • On-demand hot water, eliminating the need for water storage.
  • Fast heating and hot water delivery.
  • High energy efficiency due to no heat loss from water storage.


  • May struggle to supply hot water to multiple outlets simultaneously.
  • Limited flow rate for larger properties with high hot water demands.
  1. System Boilers:

Functionality: System boilers work with a separate hot water cylinder, making them suitable for properties with higher hot water requirements. The boiler heats water, which is then stored in the cylinder for later use.


  • Can supply multiple outlets simultaneously without a drop in water pressure.
  • Eliminates the need for a cold water storage tank, saving space.
  • Faster hot water delivery compared to regular boilers.


  • Requires space for the hot water cylinder installation.
  • Longer installation time and additional components.
  1. Regular Boilers (Conventional Boilers):

Functionality: Regular boilers are the traditional type and are ideal for properties with older heating systems. They work with a separate hot water cylinder and a cold water storage tank in the loft.


  • Suitable for properties with high hot water demands.
  • Can supply multiple outlets simultaneously without a drop in water pressure.


  • Requires a considerable amount of space for both a cylinder and a cold water tank.
  • Longer installation time and higher installation costs.


  • Combi Boilers: Efficient, space-saving, and provide on-demand hot water. Suitable for smaller properties with moderate hot water demands.
  • System Boilers: Ideal for properties with higher hot water needs, providing simultaneous hot water supply and efficient central heating.
  • Regular Boilers: Suitable for older properties with high hot water demands, but require more space for separate cylinders and water tanks.


Choosing the right type of boiler for your property depends on your hot water needs, available space, and preferences. Combi boilers are efficient and space-saving, while system boilers and regular boilers are suitable for larger properties with higher hot water demands. When considering a new boiler installation, it's crucial to consult professionals like LHS Plumbing Services, who can fit all types of boiler makes and models, ensuring a smooth and reliable heating system for your home or business.

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