Need a New Boiler? Get a 1/3 of the cost of a boiler and installation plus Free HomeCare 200™ if you call by 31st July 2010.
Call British Gas free on:
0800 524 4878
Combi boiler reviews
AlphaAristonATAGBaxiBiasiBuderusFerroliGlow wormHalsteadHeatlineIdealKestonPottertonRavenheatCSI 120 Low NOxCSI 150 Low NOxCSI 85bCSI85CSI85Little Star LS80RSF 82ERSF84/100RemehaSaunier DuvalVaillantViessmannVokeraWorcester BoschCSI 85b Reviews (Combi Condensing)
Our rating: 3/5![]()
![]()
![]()
![]()
![]()
Efficiency rating: 90.0%*
Average householder rating:
Not yet rated. Use the “comments & reviews” section below to be the first!
Average installer rating: 1/5
Ravenheat CSI 85b
Ravenheat Condensing System Innovation Combi Boiler is a new innovative design of boiler that can save you up to 35% on your heating bill and is 96% efficient. Ravenheat CSI 85b won the Institute of Domestic Heating and Environmental Engineers Award of Excellence because of its design, and the benefits to the consumer and environment.
To achieve the 96% efficiency of the model, Ravenheat CSI 85b boilers are fitted with an additional aluminium heat exchanger, which converts and uses much of the heat that is lost from gases in the outgoing flue, by condensing heat from the fumes. The second heat exchanger is fitted after the exhaust fan, which is currently uncommon in manufacturers and boilers.
- easy installation
- slim compact design to maximise space efficiency
- simple to operate, tamper proof controls with built in diagnostics and one button operation to change timer settings
- designed and manufactured to comply with ISO 9001
- SEDBUK B-rated efficiency for natural gas
- SEDBUK A-rated efficiency for LPG - environmentally friendly
- releases latent heat from flue gases to provide 96% efficiency
- technical helpline and quality after sales support
- immediate service response and commitment from specialised staff and engineers
- low Nitrogen Oxide and Carbon Dioxide emissions - environmentally innovative and environmentally friendly
- each boiler is factory tested fully
- Ravenheat CSI 85b is the winner of the Institute of Domestic Heating and Environmental Engineers Award of Excellence
- significantly lowers household fuel costs and reduces emissions (save up to 35% on heating costs)
- three year warranty
Comments & reviews
Please login or register to post comments and reviews.
* When review applies to a range of boilers, efficiency applies to best model in range. Always check with manufacturer.


By M.W.Lawrence on 13 Sep 09
Installer rating: 1/5
as I understand it the second ally heat exchanger on this boiler is the same as fitted to the CSI primary A boiler (?)we have installed quite afew of these , some of the condensate/flue gas corrosion I have seen on some of these heatexchangers is so excessive they have had to be replaced , in my opinion the ally used cannot cope , also they are not designed to be taken apart !no consideration has been given to what happens if the condensate outlet blocks between the trap inlet and the heatexchanger outlet , could wipe out all the electronics ? I've donated 2 heatexchangers to a training centre!!