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Worcester Bosch
Greenstar 2000 Combi
Model, installed scope and price are confirmed after a property review.
Build This PackageCombi boiler installation
Compare combi boiler models and request a property-reviewed quote.
Made for homes that want hot water on demand, no cylinder, and a simpler upgrade. Compare package levels, see what is included, and move from quote to installation with support for nearby postcodes where travel and engineer availability allow.
- Property-reviewed installsWritten model, scope and price after property review.
- Check the assigned engineerAsk to see their Gas Safe ID and relevant work categories before gas work.
- Written payment termsReview the confirmed quote and booking terms before paying.
- Fast installation datesStraightforward combi swaps are often the quickest option.
Combi swaps from price confirmed in your quote
Across the wider property-reviewed shortlist. Model and installed price are confirmed after your property review.
Best suited to
Flats, terraces, semis, and homes with one or two bathrooms that want a simple setup and reliable daily hot water.
Popular Worcester combi packages
Three Worcester-led packages customers compare first.
This page compares Worcester options. We confirm the selected model, installation scope and total price after reviewing your property. The quote builder also shows other suitable options.
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Compare model
Worcester Bosch
Greenstar 4000 Combi
Model, installed scope and price are confirmed after a property review.
Build This Package
Premium upgrade
Worcester Bosch
Greenstar 8000+ Combi
Model, installed scope and price are confirmed after a property review.
Build This PackageWhat is included
What is usually included in a combi installation package.
Before install day: we confirm bathroom count, hot water demand, and layout so the chosen combi package matches the home cleanly.
Running on LPG? Off-grid and propane homes should start from the dedicated LPG boiler installation page so the quote is matched to the right fuel type.
How it works
How a Combi Boiler Works
A combi boiler works a bit like the human body — each part has a job to keep your home warm and your hot water flowing.
Pump = Heart
The pump works like the heart of the system, pushing hot water around your radiators and heating circuit so warmth can move through the home.
Burner = Energy Source / Metabolism
The burner is the part that creates heat, similar to how the body turns food into energy.
Fan = Lungs
The fan helps move air in and pushes combustion gases safely out through the flue — similar to how lungs handle airflow in and out.
Heat Exchanger = Core Transfer Point
The heat exchanger transfers heat into the water quickly and efficiently. This is one of the key parts that allows a combi boiler to produce heating and hot water on demand.
PCB = Brain
The PCB acts like the brain, telling the boiler when to fire up. It sends signals to the parts, receives information back, and knows when something is not working right.
Pipes = Blood Vessels
The pipes carry hot water around the home and bring cooler water back to the boiler, just like blood vessels carry blood around the body.
When you turn on a hot tap, the boiler heats water directly from the mains, so you get hot water on demand. When your heating is on, the boiler circulates heated water through your radiators to warm your home.
Ready to upgrade to a modern combi boiler?
Get a property-reviewed quote from FlameTec and find the right boiler for your home.
Before you choose
Check the boiler against your home.
Product images illustrate boiler models. We confirm the exact model, installed scope and applicable terms after a property review.
Request a combi quotePayment terms, manufacturer terms, next steps
Clear buying steps from quote to install day.
Written quote and booking terms
We confirm the installation scope and total price after reviewing your property, and show the 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 to install in three steps
Send your quote details and photos, then request a preferred date. We confirm the package and appointment after reviewing the property and engineer schedule.
Combi boiler FAQs
Questions customers usually ask before booking.
Short answers first. If the home needs a different setup, we will tell you before the job is confirmed.
What is a combi boiler?
A combi boiler heats the central heating and produces hot water on demand from the mains, so it does not need a separate hot water cylinder for most homes.
How long does combi boiler installation take?
A straightforward combi swap is often completed in a day. Conversions, relocations, or extra system work can take longer.
Are combi boilers good for larger homes?
Sometimes, but not always. Once hot water demand gets heavier or several bathrooms are in regular use, a system boiler can be the better fit.
What is included in the price?
That depends on the package and the confirmed scope, but the normal package includes boiler supply, standard flue, fitting essentials, commissioning, and the right paperwork.
When do I see the payment terms?
We provide the confirmed quote and written booking terms before you pay.
How do I know which combi is right?
We look at property size, number of bathrooms, hot water demand, space constraints, and the model and controls that suit the home before confirming the setup.
Do you install Worcester Bosch combi boilers?
Yes. Worcester Bosch is one of the main package lines we install, including the Greenstar 2000, 4000, and 8000 ranges.
Ready to move?
Request a property-reviewed combi quote.
Compare models, send your property details and review the confirmed price and terms before booking.
Property-reviewed quote | Check the assigned engineer’s Gas Safe ID | Written terms before commitment