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Worcester Greenstar 4000 18 (ErP) System Boiler, Quick-List Pack

Current Quick List Price

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The Worcester Greenstar 4000 18 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
Manufacturer Product Number
Boiler Model
Boiler Type
System Boiler
Fuel Used
Natural Gas
Boiler Height
Boiler Width
Boiler Depth
Boiler CH Output (Kw)
Boiler CH Output (BTU)
Energy Efficiency
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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Enter product quantities below, then add Quick List to Basket

Grouped product items
Worcester Greenstar 4000 18 (ErP) System Boiler Only
£1,261.26 £1,051.05
+ -
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 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

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