Additional costs realistically estimated

I skimmed through it yesterday: you probably can't avoid having a basement for storage and for the heating and drying area outside. Then you have to transport the wood into the basement, stack it (again) there, fill the heating system.... Reminds me of the penultimate century :( Do you want that? In the end, it becomes more expensive than any savings you calculate, because wood can be purchased at a friend’s price. If your friend, as a wood supplier, has this heating system... Ok... But what is practical and economical for the friend doesn’t have to be so for someone else. At some point it gets annoying, at the latest when you are sick.

I forgot your question: The numbers seem realistic, except for the maintenance of the heating system and chimney. I would estimate 30 euros per month for that. 20 for maintenance, 10 for the chimney.

Yes, to be honest, I had that thought as well. Especially when carrying wood around in old age might no longer be so easy. However, the plan is for a massive double garage next to the house with a small connecting room where the wood gasifier should be located. The garage is then supposed to have a lean-to roof towards the garden. With about 10 cubic meters of wood, you can probably get through the winter. If I stack it 1.50 meters high, six square meters of storage space are enough, and the path from the storage to the gasifier is only a few meters. I don't want to have wood in the basement. My parents did, and it involved an incredible amount of work with a lot of dirt.

The alternative would be a so-called Markus boiler, basically a kind of pellet boiler that is fired with anthracite coal. Hard coal has an extremely high heating value and is very cost-effective to obtain as bagged goods on pallets. However, I would have to read up on this topic more carefully.

The garage is supposed to have a lean-to roof facing the garden. With about 10 cubic meters of wood, one should get through the winter. If I stack 1.50 meters high, six square meters of storage space are enough, and the path from the storage to the carburetor is only a few meters.

Ah, ok. As far as I can remember from yesterday’s quick reading, one probably calculates with 10RM per winter, but there are another 20RM "in drying," stored differently. I want to say again that I am uninformed, but I would like to pass on this skimmed information in case it has not yet been considered.

By the way, our chimney sweep was here just recently (wood stove as an additional heat source)... If our wood quality remains the same, he only needs to come once a year. In our last house, he had to check twice a year because we probably burned wetter wood.

Fortunately, I do not need space for drying. This takes place at my friend's storage yard. By the way, I have also experienced that a modern heating insert in combination with dry wood hardly causes any soot. My parents have a masonry heater and burn about 6 cubic meters of wood each winter. When the chimney sweep comes, he maybe takes out three tablespoons of ash from the chimney and has already said himself that sweeping would actually be sufficient every two years if it were not otherwise required. Also, you do not see any smoke coming from the chimney when the stove is burning properly.