Delivery address
Collection branch

Worcester Greenstar 4000 21kW System 7733600383

748721
Worcester Greenstar 4000 21kW System 7733600383
Worcester Greenstar 4000 21kW System 7733600383
Hover Over to Zoom In
Worcester Greenstar 4000 21kW System 7733600383
Worcester Greenstar 4000 21kW System 7733600383
Worcester Greenstar 4000 21kW System 7733600383
Worcester Greenstar 4000 21kW System 7733600383
Worcester Greenstar 4000 21kW System 7733600383

Overview

  • Ease of installation SimpleSwitch to previous Worcester i System models with pre-piping jig offering rear piping as standard
  • Flexibility of siting provided by long flue lengths (up to 12m with 60/100mm flues) and a 500ml integrated condensate siphon to reduce the risk of freezing
  • Complete peace of mind for the end user with a 10-year heat exchanger and a 7-year product guarantee available as standard. Wide modulation range designed to optimise efficiency when heating demand is low.
  • High-end design, quiet operation (up to 42dB(A)) with an intuitive, long text, colour boiler display for ease of use

Technical specification

Boiler Type
Combi
Maximum Vertical Flue 125mm
21m
Manufacturer Model No
7733600383
Brand Name
Worcester Bosch

Reviews

Be the first to review this product.
Retail price

£1,609.27

each
£1,341.06 ex. vat
Trade price available
Save with a Trade account
Enter postcode for local availability
Select collection branch for local availability
Please enter your delivery postcode...
Please select your collection branch...

Related products

Extremely reliable and displaying all the in-built quality you?e come to expect from Vaillant, the ecoTEC plus is clearly one of the best open vent solutions available today ? where homes utilise a traditional open-vented system to provide their heating and hot water, the ecoTEC plus open vent boiler is the ideal way to deliver exceptional energy efficient performance. The ecoTEC plus open vent boilers are the most compact boilers ever developed by Vaillant, this kitchen-friendly design, along with excellent siting versatility and low lift weight ensure a quick and straightforward installation. They are compatible with Vaillant's fantastic push-fit flue system, providing further flexibility of installation, and easier fluing options. The Vaillant ecoTEC is also simple to use, with push button programming allowing for the easy control of heat levels within the building, using less fuel ultimately saving money. They are also compatible with all Vaillant controls, including smartphone controls for remote control.
ERP Rating
A
ERP Efficiency
94%
Boiler Type
Heat Only
Depth
320 mm
Height
602 mm
Width
375 mm
Maximum Horizontal Flue 100mm
10 m
Maximum Horizontal Flue 125mm
25 m
Maximum Vertical Flue 100mm
10 m
Maximum Vertical Flue 125mm
25 m
External or Internal
Internal
SEDBUK SAP 2009 Rating
89.30%
SEDBUK SAP 2005 Rating
91%
Heat Output
30 kW
Fuel Type
Natural Gas
Noise Level
55 dB
Nox Class
6
Type
Boiler
Years Guaranteed
5
Manufacturer Model No
10021224
Country Origin
United Kingdom
Brand Name
Vaillant
Range Description
ecoTEC Plus

£1,809.60

each (Inc. VAT)
Loading...
Loading...
5 (1 review)
The Vaillant ecoTEC Pro 28 Combi Boiler uses a natural gas fuel supply and is perfect for 2-3 bedroom properties with a single bathroom and is typically popular for installation in small to medium sized houses, flats and bungalows. Vaillant's ecoTEC Pro range of combi boilers offers some of the best value boilers on the market, offering renowned quality at the best possible price. The Pro 28 combi boiler is also fully compliant with the latest ErP regulations, so you can rest assured that you are getting one of the most efficient and reliable boilers around. The Vaillant Pro 28 combi boiler is able to supply the central heating and hot water by heating the mains water supply, negating the need for a hot water cylinder or cold water feed tank, thus saving space and installation time, and providing hot water on demand.
Boiler Type
Combi
Depth
338 mm
Height
720 mm
Width
440 mm
Maximum Horizontal Flue 100mm
12 m
Maximum Horizontal Flue 125mm
39 m
Maximum Vertical Flue 100mm
12 m
Maximum Vertical Flue 125mm
41 m
External or Internal
Internal
DHW Output
27.2 kW
DHW Response 1m from Tap
5 Secs
DHW Flow Rate at 35 Degree Rise
11.1 L
DHW Output Min and Max
27.2 kW
SEDBUK SAP 2009 Rating
A
SEDBUK SAP 2005 Rating
91.29%
CH Condensing Max Output
19.1 kW
Heat Output
28 kW
Fuel Type
Natural Gas
Includes
Boiler Only
Noise Level
49 dB
Nox Class
5
Solar Compatible
Yes
Type
Boiler
Years Guaranteed
2
Registered with the Energy Savings Trust
Yes
Brand Name
Vaillant

£2,332.94

each (Inc. VAT)
Loading...
Loading...
The Energy Regular is a gas boiler from Glow-worm, which has been designed with a variety of features and benefits in mind to create a highly reliable and long lasting boiler. The Regular will heat the central heating system directly, as well as provide hot water for a seperate cylinder, meaning a hot water storage cylinder will be needed, which is fed by a cold water storage cistern located in the loft. This may not be the choice for small homes but it is ideal for a like for like replacement of a regular boiler. This unit is a highly efficient A rated boiler with a rating of 89.3%. This boiler has an output of 25kW making it perfect for homes that do not have a high demand for hot water. This boiler is compact in size helping to save space in the home. The bright, modern LCD display provides clear and obvious status updates for both customer and installer. The Energy comes with the choice of a top or rear mounted flue giving it ultimate flexibility when you're choosing an installation site. Utilising an industry standard DIN layout makes boiler swaps quick and painless. The large waterways on the aluminium heat exchanger also makes it the perfect retrofit solution.
ERP Efficiency
93%
ERP Rating
A
Boiler Type
Heat Only
Depth
280 mm
Height
700 mm
Width
375 mm
Maximum Horizontal Flue 100mm
10 m
Maximum Horizontal Flue 125mm
25 m
Maximum Vertical Flue 100mm
10 m
Maximum Vertical Flue 125mm
25 m
DHW Flow Rate at 35 Degree Rise
10.4
SEDBUK SAP 2009 Rating
A
SEDBUK SAP 2005 Rating
90.90%
CH Condensing Max Output
26.5 kW
Heat Output
25 kW
Includes
Boiler Only
Noise Level
51 dB
Nox Class
5
Solar Compatible
No
Years Guaranteed
7
Registered with the Energy Savings Trust
Yes
Made To Order
N
Manufacturer Model No
10015663
Brand Name
Glow-Worm
Range Description
Energy Range

£1,328.98

each (Inc. VAT)
Loading...
Loading...
If space is at a premium, the cupboard-size ecoFIT Pure combination boiler from Vaillant is an easy choice. The compact size and optional rear flue fitting means this boiler is ideal for even the snuggest of installations including kitchen cupboards and small cloakroom spaces. The ecoFIT pure? powerful aluminium heat exchanger offers outstanding performance and low energy consumption for any home. When you don't need as much heat, it will reduce itself to just 20% of its maximum output, meaning greater energy efficiency and lower bills. the ecoFIT is also compatible with vSMART technology, providing the ability to control the heating and hot water over the internet.
ERP Rating
A
Boiler Type
Combi
ERP Efficiency
94%
Maximum Horizontal Flue 100mm
10 m
Maximum Horizontal Flue 125mm
25 m
Maximum Vertical Flue 100mm
10 m
Maximum Vertical Flue 125mm
25 m
External or Internal
Internal
DHW Output
25.2
DHW Flow Rate at 35 Degree Rise
10.4
SEDBUK SAP 2009 Rating
89.30%
SEDBUK SAP 2005 Rating
91%
Fuel Type
Natural Gas
Includes
Boiler Only
Noise Level
49 dB
Nox Class
5
Type
Boiler
Years Guaranteed
2
Brand Name
Vaillant
Country Origin
UK
Manufacturer Model No
10020389
Made To Order
N

£1,609.19

each (Inc. VAT)
Loading...
Loading...
Valliant ecoTech Plus 430 Heat Only Gas Boiler 0010021224
Valliant ecoTech Plus 430 Heat Only Gas Boiler 0010021224
Extremely reliable and displaying all the in-built quality you?e come to expect from Vaillant, the ecoTEC plus is clearly one of the best open vent solutions available today ? where homes utilise a traditional open-vented system to provide their heating and hot water, the ecoTEC plus open vent boiler is the ideal way to deliver exceptional energy efficient performance. The ecoTEC plus open vent boilers are the most compact boilers ever developed by Vaillant, this kitchen-friendly design, along with excellent siting versatility and low lift weight ensure a quick and straightforward installation. They are compatible with Vaillant's fantastic push-fit flue system, providing further flexibility of installation, and easier fluing options. The Vaillant ecoTEC is also simple to use, with push button programming allowing for the easy control of heat levels within the building, using less fuel ultimately saving money. They are also compatible with all Vaillant controls, including smartphone controls for remote control.
£1,809.60 each (Inc. VAT)
Vaillant ecoTEC Pro Combi 28kW Gas Boiler ErP 10021837
Vaillant ecoTEC Pro Combi 28kW Gas Boiler ErP 10021837
The Vaillant ecoTEC Pro 28 Combi Boiler uses a natural gas fuel supply and is perfect for 2-3 bedroom properties with a single bathroom and is typically popular for installation in small to medium sized houses, flats and bungalows. Vaillant's ecoTEC Pro range of combi boilers offers some of the best value boilers on the market, offering renowned quality at the best possible price. The Pro 28 combi boiler is also fully compliant with the latest ErP regulations, so you can rest assured that you are getting one of the most efficient and reliable boilers around. The Vaillant Pro 28 combi boiler is able to supply the central heating and hot water by heating the mains water supply, negating the need for a hot water cylinder or cold water feed tank, thus saving space and installation time, and providing hot water on demand.
£2,332.94 each (Inc. VAT)
Glow-worm Energy 25kW Heat Only Gas Boiler ErP
Glow-worm Energy 25kW Heat Only Gas Boiler ErP
The Energy Regular is a gas boiler from Glow-worm, which has been designed with a variety of features and benefits in mind to create a highly reliable and long lasting boiler. The Regular will heat the central heating system directly, as well as provide hot water for a seperate cylinder, meaning a hot water storage cylinder will be needed, which is fed by a cold water storage cistern located in the loft. This may not be the choice for small homes but it is ideal for a like for like replacement of a regular boiler. This unit is a highly efficient A rated boiler with a rating of 89.3%. This boiler has an output of 25kW making it perfect for homes that do not have a high demand for hot water. This boiler is compact in size helping to save space in the home. The bright, modern LCD display provides clear and obvious status updates for both customer and installer. The Energy comes with the choice of a top or rear mounted flue giving it ultimate flexibility when you're choosing an installation site. Utilising an industry standard DIN layout makes boiler swaps quick and painless. The large waterways on the aluminium heat exchanger also makes it the perfect retrofit solution.
£1,328.98 each (Inc. VAT)
Valliant ecoFit Pure 825 25kW Combi Gas Boiler ErP 0010020389
Valliant ecoFit Pure 825 25kW Combi Gas Boiler ErP 0010020389
If space is at a premium, the cupboard-size ecoFIT Pure combination boiler from Vaillant is an easy choice. The compact size and optional rear flue fitting means this boiler is ideal for even the snuggest of installations including kitchen cupboards and small cloakroom spaces. The ecoFIT pure? powerful aluminium heat exchanger offers outstanding performance and low energy consumption for any home. When you don't need as much heat, it will reduce itself to just 20% of its maximum output, meaning greater energy efficiency and lower bills. the ecoFIT is also compatible with vSMART technology, providing the ability to control the heating and hot water over the internet.
£1,609.19 each (Inc. VAT)