Great choice for larger family homes with 3-4 bedrooms, 1 bathroom and 1 ensuite
All prices are fully fitted and include VAT
*Please note that all prices are subject to survey
| Warranty | 10 year manufacturers warranty |
|---|---|
| Boiler Type | System |
| Efficiency | 94%/A |
| Max Output | 18kw |
| Flow Rate | N/A |
| Dimensions | W 400mm, D 310mm, H 724mm |
| Horizontal Maximum Flue Length | 12m |
| Vertical Maximum Flue Length | 12m |
The Worcester Greenstar 4000 18kW system boiler is ideal for medium to larger sized homes, especially when paired with a heating system that has a hot water tank.
Part of the the Worcester Greenstar range, this boiler has a compact and lightweight design which makes installation easy and flexible. With features like built-in pump and expansion vessel, and an optional plug-in diverter valve, it's designed to save space. Plus, a variety of optional controls enhance user comfort and efficiency
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.
Book a SurveyWith 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 Keston installer include:
The Worcester Bosch Greenstar 4000 18kw System Boiler is perfect for medium to larger sized homes with a hot water tank. It provides 3kw more heating out put than the 15kw option, but perfect for when the 24kw option is just too powerful for what your home needs.
As a Worcester Bosch Accredited Installer, Celsius are your ideal choice for installing your new Worcester system boiler.
This boiler fits into small spaces and is fairly simple for our accredited installers to fit in your home, making it a hassle-free choice. It comes with all the smart bits inside, like a pump and an expansion vessel, and even lets you add on a diverter valve or other cool controls to dial in that perfect comfort level.
Worcester Bosch offers an extended 10-year warranty with this model when fitted by an accredited installer.
“The Worcester Bosch Greenstar 4000 18kw system boiler is a really nice boiler to have, especially for mid-sized to larger sized homes.
It’s the latest model from Worcester Bosch and it replaces the previous Greenstar 18i system boiler, which was a popular choice amongst our customers.
If you’re thinking about upgrading from your current Worcester system boiler, or if you’re planning to switch from another boiler brand, the Worcester 4000 18kw system boiler is definitely one to consider”
Conan – Gas Safe Certified Engineer @ Celsius.
100mm Flue Pipe Diameter = 12 metres minus any bends
125mm Flue Pipe Diameter = 21 metres minus any bends
100mm Flue Pipe Diameter = 12 metres minus any bends
125mm Flue Pipe Diameter = 21 metres minus any bends
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.
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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