Ideal choice for small to medium homes with
2 bedrooms and 1 bathroom
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 | 15kw |
| Flow Rate | N/A |
| Dimensions | W 400mm, D 310mm, H 724mm |
| Horizontal Maximum Flue Length | 16m |
| Vertical Maximum Flue Length | 16m |
The Worcester 4000 15kw system boiler is great for smaller homes, especially when paired with a heating system that has a hot water tank.
Part of the Worcester Bosch Greenstar range, its compact and lightweight design makes installation easy and flexible. With features like built-in pump and expansion vessel, and an optional plug-in diverter valve, it is 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 15kw System Boiler is for small to medium sized homes with a hot water tank. It is a great entry size of system boiler, when the 18kw and 24kw boiler options are not needed for your property size.
As a Worcester Bosch Accredited Installer, Celsius are fully qualified to install new Worcester Bosch system boilers.
This boiler is easy to fit into small spaces and fairly simple to install, making it a hassle-free choice. The Worcester 4000 15kw 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 stands behind this model with a 10-year warranty, which offers homeowners added reassurance for years to come.
“I have just installed the Worcester 4000 15kw system boiler into an Edinburgh home. It is a standout boiler, especially for small to medium sized homes.
It’s the latest model, succeeding the Worcester Greenstar 15i system boiler, and it slots easily into tight spaces.
If you’re looking to upgrade your current Worcester Greenstar 15i system boiler, or if you have a system boiler from a different manufacturer that you are looking to replace, the 4000 system boiler is a good option to consider.”
Blair – Gas Safe Certified Engineer @ Celsius.
100mm Flue Pipe Diameter = 16 metres minus any bends.
125mm Flue Pipe Diameter = 20 metres minus any bends.
100mm Flue Pipe Diameter = 16 metres minus any bends.
125mm Flue Pipe Diameter = 20 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 13 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 10 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 15.5 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 15 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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