The Worcester 21i System Boiler is the perfect choice for small properties such as flats and bungalows. Offering compact dimensions, a low lift weight and A-Rated efficiency, the 21i has the potential to save money on annual heating bills and offer reliability through even the coldest months. The 21i System Boiler will require a hot water cylinder in order to deliver hot water to the property. The high efficiency of the 21i boiler can cut heating and hot water bills by 15-20% annually (When replacing an older, G-Rated boiler) and is up to 30% cheaper to run. These savings mean that over the years the boiler will essentially pay for itself, as the quality of Worcester boilers means that you won't need to replace it for many years. Easy to use, the Worcester 21i includes simple boiler controls to ensure your boiler is set at the correct temperature for the customer's need, while also providing operational information and diagnostics to help with maintenance.
Compact and lightweight
Wall mounting jig
Single sided front case
Pre-wired mains cable
Simple boiler controls
On-board operational information and diagnostics
CondenseSure style syphon inside
7 year guarantee as standard, extended to 8 years* when installed with any Greenstar System Filter. *Terms and conditions apply
DHW Output Min and Max
SEDBUK SAP 2009 Rating
CH Condensing Max Output
Made To Order
Manufacturer Model No
Next Day Delivery
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