System boilers explained

Quick and easy to install, Worcester Bosch system boilers are perfect for large families where hot water is in demand.

Boiler installations

In light of the coronavirus outbreak, we wanted to share with customers our approach to installing your new boiler to ensure we keep everyone as safe as possible in the current climate. It is really important that we can still make sure you have heating and hot water by replacing your broken or faulty boiler, but do it in a way that is safe for you and for our installers. For more information, visit our installation page.

Spread the cost with 0% APR for up to three years1

No need for home visits – get a quote through a video call

Price includes installation by a Gas Safe Registered expert

Includes up to a 10 year manufacturer’s guarantee

What is a system boiler?

System boilers heat water and store it in a hot water cylinder, so there’s enough hot water for when multiple taps and showers are used at the same time. The cylinder is often installed in a convenient location like your airing cupboard. System boilers are usually installed in homes with more than one bathroom.

Why choose a system boiler?

Save valuable space

There’s no need for a water storage tank in the loft, making system boilers a good choice if you have limited space or if you’re planning a loft conversion.

Fast and economical
to run

Our Worcester Bosch system boilers are A-rated for efficiency – most components are built into the boiler, allowing them to run economically and react quickly.

Quick and easy installations

Built-in components mean system boilers are straight forward to install, and if you’re without hot water and heating, we’ll install your boiler within five working days2.

Pay with interest-free finance

Spread the price of your Worcester system boiler – you can choose to make monthly payments, at no extra cost, with interest-free credit (0% APR) for up to three years1 or choose one of our other affordable options. We’re a credit broker and not a lender.

System boiler prices

This depends on the size of boiler you need to heat your home, if you want to move your boiler and if you’re switching from a different boiler type. Get a quote from us and we’ll recommend the best Worcester system boiler for your home.

How is a system boiler different from others?

There are three types of boiler – combi, system and regular:  

  • Regular boilers rely on a cold water tank kept in the loft. A heat exchanger heats the water, which is then pumped to and stored in a cylinder ready to be used.
  • System boilers take water directly from the mains, heats water by a built-in heat exchanger, and stores hot water in a cylinder. They do not need a storage tank in the loft.
  • Combi boilers do not have a tank in the loft or cylinder for storage of water. Water is taken directly from the mains and hot water is ready on demand i.e. when you switch your shower on.

The legal stuff

1 E.ON Energy Installation Services Limited acts as a credit broker and not a lender and work exclusively with Creation Consumer Finance Limited who acts as the lender. Credit subject to status, Terms and Conditions apply. E.ON reserves the right to amend its finance offering at any time and may withdraw at short notice. E.ON Energy Installation Services Limited is registered in England and Wales under company number 09965944 with its registered office at Westwood Way, Westwood Business Park, Coventry, CV4 8LG. E.ON Energy Installation Services Limited is authorised and regulated by the Financial Conduct Authority in relation to credit broking services under number 750410.

2 Installation within five working days if you have no heating and no hot water, from the point you accept your boiler quote and either make your upfront payment or accept the Terms and Conditions of your finance agreement.