The Worcester Bosch Greenstar 21i LPG 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 Greenstar 21i Has The Potential To Save Money On Annual Heating Bills And Offer Reliability Through Even The Coldest Months. The High Efficiency Of The Greenstar 21i 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 It Won't Need Replacing For Many Years. Easy To Use, The Greenstar 21i Includes Simple Boiler Controls To Ensure The Boiler Is Set At The Correct Temperature For The Customer's Need, While Also Providing Operational Information And Diagnostics To Help With Maintenance.
Larger Condensate Siphon To Prevent Risk Of Freezing Condensate
ErP A Rated For Heating
Fully Compatible With Worcester Plug In Controls
Low Energy Modulating Pump
Expansion Tank Pre Installed In Boiler
7 year guarantee as standard, extended to 8 years* when installed with any Greenstar System Filter. *Terms and conditions apply
Maximum Horizontal Flue 100mm
Maximum Horizontal Flue 125mm
Maximum Vertical Flue 100mm
Maximum Vertical Flue 125mm
SEDBUK SAP 2009 Rating
CH Condensing Max Output
Made To Order
Manufacturer Model No
Greenstar i System
One or more item(s) in your basket aren't available for delivery to
Unfortunately, we were unable to find any substitute items to replace them with. To continue with the order we will have to remove them from your basket.
If you would like to prevent any changes, press cancel.