Gas-fired condensing boilers not only use supplied energy, in comparison to older boilers they also utilise thermal energy contained in the flue gas, energy which is otherwise lost when it exits out of the flue.

The advantages of a Vaillant gas condensing boiler:

  • Optimum energy efficiency of up to 98%
  • Significantly less soot during combustion
  • Energy consumption drops by up to 30% compared to an old heating installation
  • Low investment costs, often quick to install
  • Flexible expansion, e. g. with solar collectors, heat pumps, cylinders and controls
  • Suitable for hot water supply as well as heating

A simple guide to the different boiler types

Combination (combi) boilers

'Combi' is short for combination boiler. This type of boiler does two things, it heats water and provides central heating.

Combi boilers heat water as you draw it from the tap. They don't need a water storage tank as the boiler is connected directly to the water mains, meaning it only heats water as and when it's needed.

Homes which suit combi boilers

Combi boilers are cost effective and energy efficient, as well as compact. They don't require a water storage tank (usually in the loft) or a hot water cylinder, making them ideal for properties with limited space. Combi boilers are one of the most popular boiler types fitted in the UK today.

System boilers

System boilers also known as sealed system boilers, need a water cylinder to store hot water, however there’s no need for a water tank in the loft, as the heating systems are built into the boiler itself, unlike regular boiler systems.

Homes which suit system boilers

System boilers are ideal for homes with more than one bathroom, as they provide a constant supply of hot water to any number of taps at the same time.

Regular boilers (open vent)

Regular boilers, sometimes known as open vent, heat only or gravity-fed boilers, provide central heating and hot water through a hot water storage cylinder. The cylinder is often found in an airing cupboard and the cold water tank is usually found in the loft.

Homes which suit open vent boilers

If your home has multiple bathrooms, open vent boilers are perfect as they can provide a lot of hot water at the same time. Open vent boilers work well if you are replacing an old open vent heating system, and ideal if water pressure is low in your area.

So what is the right heating system for your home?

To find the perfect solution for your home, speak with your local Vaillant Advance heating installer for further advice and support.

An installer will assess your hot water and heating demands, look at your current boiler and then advise on the most efficient and effective Vaillant boiler to ensure it delivers maximum comfort for your home.

Find an installer here

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