A comment
Thermofor boiler "Professor Butakov Student Hydraulic" is the very first solid fuel boiler I bought. I had no business with them before, but decided to try it. Honestly, I expected more. The manufacturer promised that the boiler capacity of 16 kW should be enough for rooms up to 400 m3, my house is 115 sq. M, the volume is about 300 m3. According to the idea, even a decent margin is obtained here, but there is not enough power. Although the house is insulated, there is forced circulation with a closed circulation system, and then the volume of coolant is not so big. But, nevertheless, all this did not help in any way.
The biggest thing that I managed to squeeze out of the coolant is a temperature of 65 ° C, and so it rises no more than 50 ° C, and it lasts only 2-3 hours. In general, the boiler will have to be changed, it did not live up to all my expectations. Only tormented with him, the quality is not the best.
pros
High-quality welding, cast iron grate, it is convenient to remove the ash
Minuses
Bad design. It does not give the declared power, an inefficient heat exchanger, huge heat loss, it is impossible to install a draft regulator, it is impossible to clean.