I've checked the instruction manual as well as the brochure and see only 1 inlet and 1 outlet.
See page 24 and page 25 here:
It would be against all EU rules and the WHO guidelines as well to use the same circuit for DHW and space heating circuit.
As far as I can see this saturn machine is a plain oil fired CH boiler. Where one can switch between two pre-programmed outlet temperatures. It has only 1 inlet and 1 outlet. Therefore it is not a combi-boiler.
Nowhere the manufacturer/seller claims that this boiler is a combi boiler. As far as I can see....
The technical specification on page 33 tells the same story:
" heat efficiency of 95% normal" and "hot water efficienzy of 95%"
With a combi-boiler feeding fresh cold water condensation would be achieved since the cold heat exchanger would cause it. The efficiency of the DHW would be higher than the efficiecy of the space heating circuit, plain logic.
B.t.w.: I have never heard of any boiler operating in a non-condensing modus delivering a 95% fuel efficiency.
To what standards have these efficiency tests been done ?
From the brochure:
|Condensing efficiency of 101%.|
Usually the manufacturer would tell this (EN or BS or similar), it's a legal issue. Not with this one, as far as I can see.....
Would you mind to clarify, gdavis? Maybe a link to a more detailed explosion drawing, pictures showing the exact build-up? Thanks
@ the OP: there is nothing like an oil fired combi boiler in domestic sizes available. Contact a professional heating engineer.
And @ those who have seen this thing operating: what efficiency is meassured in-situ?