Hi Steve, I agree, if there is a problem with the Eberspächer Hydronic 5/10, be it the fuel used and/or the installation designs employed by the boat builder, then it would be in Eberspächer's interests to get to the bottom of it one way or another. If this means collaborating with other manufacturers of this kind of kit in order to square up the fuel suppliers if they are at fault, then they should adopt a pro-active approach and get on with it. If it means developing their unit some more, then they should get on with that too. The Eberspächer bloke I talked to would not say if they were waiting for the dust to settle on the red diesel derogation issue, before committing to some more development.
I feel I should point out that our original thoughts behind the 'two tanks' idea was in response to the threat to the tax derogation on red diesel. So we were heading this way anyway - an added benefit is the option to use different fuels to help with this boiler sooting or gumming problem with Eberspächer (and possibly other units).
I agree with you, there is no such thing as 100% reliability, but I propose that, these days, you can get quite close to it. We have decided that we will not change from the Eberspächer Hydronic 5 just yet, because with us requiring a diesel fired system, we have not yet seen any objective evidence to prove this is not an endemic problem. It would be very interesting to structure a poll or on-line questionnaire on CWDF in such a way that this would drive out data that could then be used to indicate the reliability of all diesel fired boilers in use on inland waterway boats. This information could then be used alongside the first cost and service frequency/cost data from the manufacturers to calculate the approximate LCC (Life Cycle Cost) for each unit. Then we would see who has the best package around at the moment.
It would be interesting to learn if NBC descision was purely based on in-service reliability, or whether there were other influential factors (e.g. availability in Poland, or warranty coverage, avalability of field personnel, etc.).
Not looking forward to beating up Eberspächer during the warrantly period, but if needs must, then I will be!
Cheers, Chris.