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 | 25kw |
| 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 24kW 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 24kw System Boiler is a perfect fit for medium to larger sized homes with a hot water tank. It offers that little bit more power compared to the 15kw and 18kw options.
As a Worcester Bosch Accredited Installer, Celsius are the ideal choice for installing your new Worcester Bosch system boiler.
It’s easy to fit into small spaces and simple to install, 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 provide a 10-year warranty when this boiler is fitted by a Worcester accredoted installer. This extended warranty offers homeowners added reassurance in the boiler’s reliability for years to come.
This boiler takes the place of the previous Worcester Greenstar 24i system boiler, which was well-loved by Celsius customers for many years.
“The Worcester Bosch Greenstar 4000 24kw system boiler is a fantastic boiler that can power up to 14 radiators and a mid sized hot water tank.
We are installing these boilers regularly in homes around Edinburgh. If you have a larger sized home with more radiators and you’re looking for a new system boiler with a bit more ‘oomph’, the 4000 24kw system boiler from Worcester is well worth a look.”
Michael – Founder and 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 20 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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