Description
The Worcester Greenstar 4000 21kW 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
Worcester Greenstar 4000 21 System Boiler
