96% efficient with advanced features
The new super high 96% efficient CSI is supplied with a whole range of advanced features including slim design, tamper proof controls, built-in diagnostics, built-in 'S' trap with simple pipe connection (3/4" overflow pipe), easy installation and is simple to operate.

Low cost hot water
Low cost hot water, fuel efficiency and reduced green house emissions are just some of the benefits of installing a Ravenheat condensing combi boiler.

SEDBUK RATING FOR THE CSI 85b (T)
Boiler Efficiency - SEDBUK
CSI - 85b (T) Nat Gas 88.0% BAND B
CSI 85b (T) LPG 90.0% BAND A
What is SEDBUK
SEDBUK stands for Seasonal Efficiency of Domestic Boilers in the UK, and it is the governments initiative for measuring equally all boiler manufacturers efficiency.
All Ravenheat SEDBUK BAND A Boilers come with a 3 year guarantee.
Available For Natural Gas & LPG.