
Worcester Bosch boiler installation
Greenstar combi, system and regular boilers, fitted properly.
We install Worcester Bosch Greenstar boilers in homes across the South West. Tell us about your home, we survey it, recommend the right Greenstar model and size, and give you one fixed price for the whole job. Every installation is done by a Gas Safe registered engineer.

Which Greenstar boiler suits your home?
Worcester Bosch splits its Greenstar combis by the size of home they suit. The right one depends on how many bathrooms you run at once, your mains water pressure and how much heat the house needs, which is why we choose it on the survey rather than from a brochure.
- Greenstar 1000: Worcester Bosch's go-to combi for smaller homes, such as flats and one-bathroom houses.
- Greenstar 4000: a combi for medium-sized homes, which the manufacturer describes as super quiet.
- Greenstar 8000+: the top of the combi range, with a modern design and the longest guarantee Worcester Bosch offers.
- Compact and Lifestyle ranges: compact models designed to fit inside a kitchen cupboard, and a design-led range for boilers on show.
- System and regular boilers: for homes with two or more bathrooms in use at once, or older systems that keep a cylinder and loft tank.
Greenstar combi models we fit

Greenstar 1000
Smaller homes
Worcester Bosch's go-to combi for flats and smaller homes with one bathroom.

Greenstar 4000
Medium-sized homes
A combi for medium-sized homes, which Worcester Bosch describes as super quiet.

Greenstar 8000+
Top of the range
The flagship combi with a modern design and Worcester Bosch's longest guarantee. Shown here in the black Style finish.
Product images: Worcester Bosch. We recommend the model and output after the survey.
Worcester Bosch boilers in real homes



Images: Worcester Bosch.
How a Worcester Bosch combi boiler works
A one-minute explainer from Worcester Bosch on how a combi boiler heats your home and your hot water on demand, with no tanks or cylinder.
Video: Worcester Bosch on YouTube.
Worcester Bosch guarantees, explained
Worcester Bosch links its longest guarantees to how the boiler is fitted. It offers up to a 12 year guarantee on the Greenstar 8000+ when the boiler is installed by a Worcester Bosch Accredited Installer with a Greenstar system filter. Extended guarantees on the Greenstar 1000 and 2000 are available when a system filter is fitted.
Every guarantee also expects a yearly service by a Gas Safe registered engineer. We confirm the exact guarantee for your model on your quote, register it for you after the installation, and can book your first boiler service.
Gas, oil and LPG
Worcester Bosch makes Greenstar boilers for mains gas, oil and LPG. That matters in the South West, where plenty of homes are beyond the gas main. Our OFTEC registered technicians handle oil boiler installation and we fit LPG boilers too.
What a Worcester Bosch installation with us includes
The job is the same careful process whichever Greenstar model you choose. See our new boiler cost guide for what affects the price.
What happens, step by step
Answer a few questions
Use our quote tool to tell us about your home.
Free survey
We check pressure, flue position, gas supply and pipework, then pick the Greenstar model.
Fixed price
One price for the whole job, with the guarantee confirmed in writing.
Fitted and registered
Most like-for-like swaps take a day. We register the guarantee before we leave.
What is included
- Home survey and heat loss check
- Greenstar model and size recommended for your home
- Removal and disposal of the old boiler
- New boiler, flue and controls fitted by a Gas Safe engineer
- System clean and a magnetic system filter
- Building Regulations notification
- Guarantee registration with Worcester Bosch
Worcester Bosch boilers FAQs
Which Worcester Bosch boiler is best for my home?
For a flat or a one-bathroom home, a Greenstar 1000 combi is often enough. Medium-sized homes usually suit the Greenstar 4000, and the 8000+ suits buyers who want the top model and the longest guarantee. With two or more bathrooms in use at once, a Greenstar system boiler with a cylinder is usually better. We confirm it on the survey.
How long is the Worcester Bosch guarantee?
It depends on the model and the installer. Worcester Bosch offers up to 12 years on the Greenstar 8000+ when fitted by a Worcester Bosch Accredited Installer with a Greenstar system filter. We confirm the exact guarantee for your boiler on your quote.
Can you replace my old Worcester Bosch boiler like for like?
Usually, yes. If the flue position and pipework still meet current rules, a like-for-like Greenstar swap is often a one-day job. If you are moving off loft tanks, see combi conversions.
Do you service and repair Worcester Bosch boilers too?
Yes. Our Gas Safe engineers service and repair Worcester Bosch boilers. See boiler service and boiler repair.
Worcester Bosch or Vaillant?
Both are reliable, well-supported brands and we fit both. Our guide to Worcester Bosch vs Vaillant compares the ranges, or see Vaillant boiler installation.

Get a fixed price for your home
Tell us about the job and we will arrange a free survey.