Worcester Bosch 4000 — fitted from around €3,300
A complete replacement in a standard 2–3 bedroom house, old boiler taken away, fully certified.
About the Bosch 4000
The Bosch 4000 — supplied with a 10 year guarantee
The 4000 is Bosch's modern replacement for the long-running Greenstar i range. It is a premium unit with a clean, simple control dial and a reputation for reliability that is a large part of why people ask for Worcester by name.
- Excellent energy efficiency
- Premium build and a compact cabinet
- Simple, clear control interface
- Quiet in operation
- 10 year manufacturer guarantee
About the 10 year guarantee
The Bosch 4000 comes with a 10 year manufacturer guarantee. We register it for you when we install it, so the cover starts properly from day one.
As with every manufacturer, the guarantee only stays valid if the boiler is serviced every year by a registered gas installer. We complete the service record each time, so the paperwork is there if you ever need to claim.
Which size will you need?
A typical 2–3 bedroom house with one bathroom is usually well served by the 15kW, which is what the guideline price is based on. Larger homes, or houses with more than one bathroom, generally need more output. We size it properly during the free assessment — an oversized boiler costs more to buy and more to run.
Already have a Worcester and just need it serviced? See our Worcester Bosch servicing page.
Guideline price
Worcester Bosch 4000 15kW
- Boiler supplied and fitted
- System filter fitted as standard
- Inhibitor added to protect the system
- Old boiler removed & disposed of
- System tested and commissioned
- Full RGI certification
- Warranty registered for you
Guideline only — see below for what can change it
What is involved in your boiler replacement
We take care of the whole job, including getting rid of the old boiler properly. You do not need to arrange anything yourself.
Free assessment
We come out, look at your existing system, your pipework and where the boiler sits, and confirm what your home actually needs — not just a like-for-like swap if that would be the wrong answer.
A written price
You get a clear price before anything is ordered, with anything unusual about your property already accounted for. No surprises once we start.
Old boiler removed safely
The gas supply is isolated, the system drained down, and the old boiler disconnected and taken out. We protect the area we are working in.
Disposed of responsibly
We take the old unit away with us and dispose of it properly. Old boilers contain metals and components that should not go in a skip.
Worcester Bosch 4000 installed
Fitted by our own RGI registered engineers, with any pipework, valves or flue work needed to do the job correctly.
Protected, tested and certified
The system is refilled with inhibitor added to protect it against corrosion and sludge, then vented, fired and fully tested. You get full RGI certification, and all work is carried out in accordance with Irish Standard I.S. 813.
We also show you how it works
Before we leave, we will run through the controls with you so you are not left guessing — how to set the timer, what the pressure gauge should read, and what to do if it ever drops.
What can change the price
The guideline figure covers a straightforward replacement in a typical 2–3 bedroom house. What moves it up or down is usually the state of what is already there, and what is needed to bring the installation up to standard:
- Moving the boiler to a different position
- Flue routing and length
- Condensate drainage
- Upgrading old or undersized gas pipework
- Ventilation work to meet I.S. 813
- Earth bonding upgrade
- Carbon monoxide alarms
- New heating controls
- A power flush if the system is heavily sludged
- Changing boiler type, for example system to combi
None of that gets sprung on you afterwards. We look at all of it during the free assessment, and it is in the written price before you decide.
Thinking about a Worcester Bosch 4000?
Free assessment and a written price, with no obligation. Give us a call.