@maple1 beat me to the point, in that short of taking up a collection to send
@sloeffle over to Denmark, I don't think we're going to solve this problem quickly enough to save you from some cold nights in the next few days. You had mentioned using the same service tech as the prior owner, so if prior owner isn't available, maybe have them come evaluate how you're operating the thing?
The smaller wood all sounds good. Heck, everything but those 25% logs sounds pretty good. Even mixed 19% ± 3% splits are plenty good, assuming your measurements aren't all off.
My partner is even insisting that these values are artificially high as he thinks the meter isn't calibrated properly (based on comparisons with wooden furniture and values we got from a previous meter that broke). I can't believe in that though!
Furniture or lumber in an unheated garage should be measuring teens %, look up Equilibrium Moisture Content for your locale and month, the data is out there. Furniture in a heated space will be much lower, depending on heating, but likely (and unpredictably) under 10%.
... so much tar/creosote/soot and condensate was being produced. As in when I opened the lower section to clean behind the furnace every 2 to 3 days, liquid came gushing out each time...
Just to be clear, liquid from
combustion, not a boiling-over hydronic heating system?
@Ashful thanks for the tips for making a manometer. It would be great to have these pieces of kit and thermometer etc
Do you have a target value for draft? Depending on the number a tube full of water might be accurate enough, such that you don't have to worry about finding a low-weight liquid.
I reckon... we certainly ain't...
You say you're from Denmark?!? Sounds like Pennsylvanian, to me.