Combination Boilers

What is a combi boiler?

A combi (or combination) boiler is an ingenious space-saving idea, and an increasingly popular choice in UK homes. In fact, combis now account for well over half of all the new domestic boilers installed in Britain every year.

A combi boiler is both a high-efficiency water heater and a central heating boiler, combined (hence the name) within one compact unit. Therefore, no separate hot water cylinder is required, offering space saving within the property.

Further benefits of a combi boiler includes hot water being delivered through your taps or shower at mains pressure. So you can enjoy powerful showering* without the need for a pump.

Another combi boiler benefit is that it can generally save you money on installation time and costs, since no tank in the roof space means less pipe work and a shorter installation time.

A Combination of 'Combi' boiler is both a high efficiency water heater and a central heating boiler in a single unit. Combi Boilers heat water directly from the mains when you turn on a tap, so you won't need a hot water storage cylinder or a cold water storage tank in the roof space

They are also very cost-effective and energy-efficient as water is heated instantly rather than being heated and then stored in a cylinder. An added benefit is that hot water is delivered at mains pressure, which means that you could get a powerful shower without the need for a seperate pump.

  • Compact sizes make combi boilers perfect for smaller properties
  • Ideal where there is little of no loft space No Need for a hot water cylinder allows
  • No Need for a hot water cylinder allows increased living space
  • No cold water storage tank frees up a loft for conversion
  • No risk of loft pipework freezing Less pipework in the home makes instatallion typically cheaper


Providing instant hot water without the need for a tank, the ecoTEC pro combination boiler is compact enough to fit small to medium homes with average hot water consumption and comes in a range of outputs.
Tried and tested heat exchanger built in high-quality stainless steel meaning increased efficiency, decreased fuel bills
Stylish contoured case design with a bright and simple to use backlit display easy operation of the boiler
Quiet Mark approved, assuring you of ultra-quiet operation in your home.
Which? Best buy 2016 accredited

ecoTEC pro combination boilers feature a wide modulation of 1:4, for a high level of efficiency with lower fuel bills meaning the boiler can adapt itself to give only the exact heating output you require which ultimately lowers fuel bills. Much like pressing on the gas pedal of your car to adjust power and speed
Incorporates a full range of thermostat controls, from simple analogue timers that plug easily into the boiler front to Vaillant vSMART™ app based control
Hand assembled in Derbyshire by one operative from start to finish, in our award winning manufacturing plant.



Output - 24 kW
Flow Rate - 9.6 l/min
ErP Heating - A
ErP Hot Water - A




Output - 28 kW
Flow Rate - 11.1 l/min
ErP Heating - A
ErP Hot Water - A




Output - 30 kW
Flow Rate - 12.3 l/min
ErP Heating - A
ErP Hot Water - A


Regular Boilers

What is a Regular boiler?

Regular boilers (also known as ‘conventional’ boilers) heat your central heating system directly and produce hot water for your cylinder. If you are replacing an older model of boiler, the chances are that you will have a regular (also known as ‘conventional’) boiler.

A typical regular boiler system incorporates a boiler, extended controls, a hot water cylinder which is often fed by a cold water storage cistern located in the loft and a feed and expansion cistern – also located in the loft.

SYSTEM Boilers

What is a System boiler?

A system boiler, just like a regular (conventional) boiler works on the principle of stored hot water.

However, a system boiler differs from a regular boiler in some important respects.

Firstly, many of the major individual components of the heating and hot water system are built into a system boiler, which means that installation is quicker, neater, easier and more efficient.

Secondly, the hot water is pumped from the system boiler through the heating system to the radiators and hot water cylinder, resulting in a fast response and more economical running costs.

The system boiler removes the need for a feed and expansion cistern.