FlameTec Boilers

System boiler installation for homes that need stronger stored hot water.

A system boiler works with a hot water cylinder, which makes it a better fit for larger homes, multiple bathrooms, and households that need stronger hot water performance than a combi can usually deliver. For most of these jobs, Worcester 4000 and Worcester 8000 are the first packages we want homeowners to compare.

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Property-reviewed package quoteClear pricing before final checks and booking.
Check the assigned engineerAsk to see their Gas Safe ID and relevant work categories before gas work.
Cylinder-led adviceMatched to homes with a hot water cylinder.
Written payment termsReview the confirmed quote and booking terms before paying.

Worcester-first system advice Better for multiple bathrooms Ideal for larger homes

Illustrative system boiler and cylinder layout

Compare Worcester Greenstar 4000 System We also push Worcester 8000 for higher-demand homes, and Worcester Ri if the property should stay heat-only instead.

Best suited to

Larger homes, heavier hot water demand, and properties that already use a hot water cylinder.

Cylinder-backed performance

Stronger choice where more than one bathroom is in real use.

Sealed modern layout

A neater setup than many older regular boiler systems.

Two-channel controls

Set up to match the boiler, cylinder, and home.

Engineer-led support

Local advice before, during, and after the job is confirmed.

What is a system boiler?

A system boiler heats your home and works with stored hot water.

Unlike a combi, a system boiler uses a hot water cylinder. That means the home can draw on stored hot water, which is why system boilers are often the stronger answer for larger households and higher demand.

Uses a hot water cylinder

Stored hot water helps when several outlets may be needed close together.

Better for heavier demand

Ideal where the home regularly asks for more than a simple combi setup.

Cleaner sealed layout

A modern system boiler can be a neater step on from traditional regular systems.

Why choose a system boiler?

Built for bigger households and stronger hot water performance.

Better hot water performance

A stronger option when simultaneous demand matters more than saving space.

Good for bigger households

Particularly useful where mornings and evenings are busy.

Multiple bathrooms

More comfortable where a single combi may be a compromise.

Cylinder-led homes

The sensible upgrade when the property already suits stored hot water.

Recommended system boiler packages

Worcester-led packages for homes that need a cylinder-backed setup.

Product photos illustrate model families. We confirm the exact variant, installation scope and manufacturer terms in the written quote.

FlameTec pick

Worcester Bosch

Greenstar 4000 System

Manufacturer termsApplicable terms for the selected model are confirmed in writing.
Best forFamily homes wanting the strongest all-round Worcester system package
Why choose itQuiet running, premium feel and the system boiler we most often want customers to compare first

Model, installed scope and price are confirmed after a property review.

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Premium Worcester

Worcester Bosch

Greenstar 8000+ System

Manufacturer termsApplicable terms for the selected model are confirmed in writing.
Best forLarger homes with heavier stored hot water demand
Why choose itHigher-end Worcester presentation with stronger output options

Model, installed scope and price are confirmed after a property review.

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Alternative value option

Glow-worm

Energy7 System

Manufacturer termsApplicable terms for the selected model are confirmed in writing.
Best forMeasured upgrades with a cylinder already in place
Why choose itGood-value system package if you are not taking the Worcester-first option

Model, installed scope and price are confirmed after a property review.

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Also worth comparing

Worcester Greenstar Ri is a strong option for traditional cylinder homes.

Where the home already suits a regular boiler layout, Ri is often the cleanest like-for-like route.

Straight traditional swaps

Where the cylinder, loft tank and wider arrangement still make sense, Ri keeps the job simpler and less disruptive.

Worcester support

It gives you Worcester parts, support and product familiarity while keeping the layout the home already suits.

Matched to the layout

Best where the cylinder and loft-tank setup already works well and the aim is a tidy straightforward replacement.

See Worcester Ri Heat-Only Guide

What is included

The install includes the whole system, not just the appliance.

With a system boiler, the surrounding controls, cylinder checks, and wider layout matter. We treat that as part of the package, not an afterthought.

Boiler supplyOutput matched to the property and heating demand.

Standard flueIncluded where the confirmed package allows.

Magnetic filterIncluded on the normal package options.

System cleanseFlush or cleanse included where appropriate for the existing system.

Cylinder-side checksWe review the stored hot water side as part of the install plan.

Two-channel controlsSet up clearly for heating and hot water timing.

Engineer credentialsCheck the assigned engineer's Gas Safe ID and relevant work categories before gas work.

Registration and handoverPaperwork, controls, and aftercare explained clearly.

Old boiler removalIncluded where your confirmed package says it is included.

Property review

Check the complete cylinder-backed system.

We review the boiler, cylinder, controls, pipework and installation access before confirming the system-boiler quote and date.

Request a system-boiler quote

Manufacturer terms, payment, quote process

Simple next steps for a more complex boiler type.

System boiler jobs often need better explanation. We keep that part calm, clear, and tied to a real package.

Written quote and booking terms

We confirm the installation scope and total price after reviewing your property, and show booking terms before payment.

Manufacturer terms for the selected model

We confirm the applicable manufacturer terms and any registration requirements in the written quote.

Quote, checks, installation

Build the quote, upload the photos we need, confirm the right system package, and move to install without the usual back-and-forth.

System boiler FAQs

Useful answers before you choose a cylinder-backed setup.

System boilers are excellent when the home needs them. The key is making sure the property really does.

What is a system boiler?

A system boiler heats the home and works with a hot water cylinder. It stores hot water for use around the house instead of making it on demand like a combi.

Do I need a hot water cylinder?

Yes. A system boiler is designed to work with a cylinder, so stored hot water is part of the setup.

How long does installation take?

Like-for-like replacements can be quick, but the overall time depends on the cylinder, controls, and any wider system work involved.

Are system boilers better than combis?

Not automatically. They are simply better for homes that need stronger stored hot water capacity or have a layout that suits a cylinder-backed system.

What is included in the price?

That depends on the package and scope, but it normally includes boiler supply, standard essentials, commissioning, and the paperwork tied to the installation.

When do I see the payment terms?

We provide the confirmed quote and written booking terms before you pay.

Do you install Worcester Bosch system boilers?

Yes. Worcester Bosch system packages are one of the main options we offer, alongside value-led alternatives where they suit the job better.

Ready to move?

Build your system boiler quote and see the right setup before you book.

If a system boiler is right for the property, we will show you clearly. If a combi or heat-only setup is smarter, we will say that before the install is locked in.

Start My System Quote Compare Combi Boilers

Property-reviewed quote | Local engineer-led support | Payment terms provided in writing before commitment