0% finance available 
Up to 12 years aftercare 
Edinburgh Trusted Trader With every new combi boiler installation, you will get a free Celsius wireless control.
All prices are fully fitted and include VAT
*Please note that all prices are subject to survey
£2700
inc vat| Warranty | 10 year manufacturer's warranty |
|---|---|
| Boiler Type | Combi |
| Efficiency | 94%/A |
| Max Output | 30kw |
| Flow Rate | 12.3 l/m |
| Dimensions | W 400mm, D 310mm, H 724mm |
| Horizontal Maximum Flue Length | 12m |
| Vertical Maximum Flue Length | 12m |
Part of the Greenstar range, the Worcester 4000 30kw combi boiler is suitable for medium-sized homes with 2 bathrooms.
This boiler fits neatly in cupboards, saves energy, and is easy on your bills. It's reliable, makes your home cozy, and is easy to operate. It is a smart choice if you're in the market for a new Worcester Bosch combi boiler.
Next Day Installation
Subject to availability.
Free Wireless Programmable programmer
With every new combi boiler installation
In your package is everything you need to make your installation go as smoothly as possible.
Choose Survey DayWith every new combi boiler installation, you will get a free Celsius wireless control.
With our aftercare service we promise to keep your boiler in tip top shape. We will register the boiler warranty for you, deal with any boring paperwork and ensure you receive fast track priority for any warranty repairs. Our aftercare service also comes with discounted in-warranty boiler servicing and we will even remind you when your annual service is coming up! To see a full breakdown as well as terms and conditions please click here.
Some of the amazing benefits of working with an accredited installer include:
Part of the Worcester Bosch Greenstar range – meet the Worcester 4000 30kw Combi Boiler. It will become your home’s new best friend for heating and hot water.
It’s great for medium-sized homes, offering that cozy feeling without the high bills or environmental guilt.
This boiler is all about giving you the best of both worlds: instant hot water and efficient heating. Plus, it’s super quiet, ‘Quiet Mark Certified’ in fact and it won’t take up much space, so you can enjoy peace and comfort without even knowing it’s there.
With its easy-to-use controls, the Greenstar 4000 is a no-brainer for anyone looking to make their home more energy-efficient and comfortable.
It’s compact size and modern design makes this boiler versatile, while Worcester Bosch’s reputation and 10-year warranty gives you peace of mind.
“I’ve worked on a lot of boilers over the years, but the Worcester Bosch Greenstar 4000 30kw combi boiler really stands out.
Installation is straightforward, and homeowners appreciate it’s simplicity when using the boiler. The best part – it is really good at saving energy, which means lower bills for you.
The internal parts are great quality and it’s designed to last a long time without needing much fixing, which is exactly what you’d want. It’s also quiet, a really quiet boiler. In fact it hardly makes a peep!
If you’re thinking about getting a new combi boiler, the Worcester 4000 30kw is a smart pick.”
Jamie – Gas Safe Certified Engineer @ Celsius.
What is the total maximum horizontal flue length?
100mm Flue Pipe Diameter = 12 metres minus any bends
125mm Flue Pipe Diameter = 21 metres minus any bends
What is the total maximum vertical flue length?
100mm Flue Pipe Diameter = 12 metres minus any bends
125mm Flue Pipe Diameter = 21 metres minus any bends
What should be deducted off the total flue length for each 90 degree flue bend on a 100mm flue pipe diameter installation?
Answer: 1.5 metres needs to be deducted for every 90 degree flue bend.
Example Horizontal Flue: If there is 2 x 90 degree flue bends needed for the installation, the maximum horizontal flue length would be reduced to 9 metres.
Example Vertical Flue: If there are 4 x 90 degree flue bends needed for the installation, the maximum horizontal flue length would be reduced to 6 metres.
Top Tip! For longer flue runs, increase the flue pipe size diameter from the standard 100mm to 125mm.
What should be deducted off the total flue length for each 45 degree flue bend on a 100mm flue pipe diameter installation?
Answer: 0.5 metres needs to be deducted for every 45 degree flue bend.
Example Horizontal Flue: If there is 1 x 45 degree flue bend needed for the installation, the maximum horizontal flue length would be reduced to 11.5 metres.
Example Vertical Flue: If there are 2 x 45 degree flue bends needed for the installation, the maximum vertical flue length would be reduced to 11 metres.
Top Tip! For longer flue runs, increase the flue pipe size diameter from the standard 100mm to 125mm.
Download the Installation and Servicing instructions here
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