Biomass boiler. Advice sought

[Lightspeed]

Update:

We eventually elected for a similar but different brand boiler. Slightly less powerful at max 20Kw but that will meet our needs fine.
Change of choice is in order to get a better engineered auto-feed, thicker boiler wall material, greater efficiency and easier cleaning. The latter being the most important consideration as we'll primarily be burning coal, which creates more soot and ash than wood.


The boiler itself is now delivered, next step is construction of a new chimney for it. Unfortunately turned out that our existing chimney is not ideal, especially as we want the existing multi-fuel stove and thermal store arrangement to continue to function in its current way (This is our deep level fall back solution that is fundamental to 100% off grid living). On the up side chimney cleaning will be easier, and the neat convection extraction system of the existing chimney will be retained (it would for sure have been lost if the new boiler flue was fed into that main chimney)

We just need to agree the budget for new chimney construction, then installation can begin next month. This will be interesting!