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Worcester Greenstar 4000 21 (ErP) System Boiler, Quick-List Pack

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The Worcester Greenstar 4000 21 condensing system boiler is a good choice for a medium to large-sized home when used with a heating system that includes a stored hot water cylinder. Compact and lightweight, it allows simple and versatile installation, while a wide range of optional controls offers added user comfort and economy.

  • Compact, space-saving dimensions
  • Built-in pump and expansion vessel
  • Plug-in optional diverter valve
  • Range of optional controls
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Manufacturer Product Number
WG400021S/QL
Boiler Model
4000
Boiler Type
System Boiler
Fuel Used
Natural Gas
Boiler Height
724mm
Boiler Width
400mm
Boiler Depth
310mm
Boiler CH Output (Kw)
21
Boiler CH Output (BTU)
71000
ErP Heating Rating
A Rated for Heating
Mr CH's Warranty advice
Manufacturers Warranty
7 Years (Subject to Manufacturers T&C's)
Warranty Terms and Conditions
Customer Questions
What are the internal and external sizes of the BoilerBox

Inner - 76.8cm L x 57cm W x 41.5cm H - Outer - 80cm L x 60cm W x 44.5cm H

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Grouped product items
Worcester Greenstar 4000 21 (ErP) System Boiler Only
£1,304.94 £1,087.45
+ -
Worcester Telescopic 350 mm - 570 mm Horizontal Flue Kit
£98.14 £81.78
+ -
Worcester Long Telescopic Horizontal Flue Kit (570mm - 790mm)
£103.78 £86.48
+ -
Worcester Vertical Flue Kit (inc Adaptor)
£130.85 £109.04
+ -
Worcester Vertical Adaptor
£47.38 £39.48
+ -
Worcester 220mm Short Flue Extension
£29.33 £24.44
+ -
Worcester 960 mm Flue Extension
£51.89 £43.24
+ -
Worcester 2 Metre Flue Extension
£119.57 £99.64
+ -
Worcester 90 Degree Flue Bend
£41.74 £34.78
+ -
Worcester 45 Degree Flue Bends (Pair)
£77.83 £64.86
+ -
Worcester Plume Management Kit
£78.96 £65.80
+ -
Worcester 1 Metre Plume Extension
£27.07 £22.56
+ -
Worcester 90 Degree Plume Bend
£32.71 £27.26
+ -
Worcester 45 Degree Plume Bend (Pair)
£28.20 £23.50
+ -
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Current Quick List Price

£0
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