What is a combi boiler?

combi boiler is both a high-efficiency water heater and a central heating boiler, combined together. Therefore, no separate hot water cylinder is needed, offering space saving within the property, less maintenance and can save you money on your energy bills.

A gas combination boiler, more commonly referred to as a combi boiler, combines a high-efficiency water heater and a central heating boiler in a single compact unit. Combi boilers are highly efficient and most are now manufactured with an efficiency rating of 90% or better.

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Benefits of a combi boiler

Combi boilers are becoming an increasingly popular choice amongst our customers across the UK due to their space-saving functionality.

  • Their compact size make them ideal for smaller properties and can give you extra space
  • Only one unit is needed to deliver heat to your radiators and hot water to your taps. No more water cylinder.
  • No requirement for hot water cylinder or cold water storage tank
  • They are quicker to install
  • Hot water is delivered to your taps and shower at mains pressure
  • No risk of cold water pipework freezing
  • Comprehensive warranty as standard

Viessman Combi Boilers – The entire combi boiler range is rated Energy efficiency class: A.

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