Thank you for the comments and questions.
A few things that we would like to reply to, Dry fire chamber burns hotter, not being water cooled, aprox 700 to 800 degrees, this keeps the chamber free from creosote and dry, the moisture from the wood is carried through the system and out the stack. Ash is really not corrosive until it gets wet and the round design handles those temps without warping or cracking.
The pressurized boiler keeps air out of the system, open systems that are not flushed or have the correct amount of treatment in them will produce sludge. Corrosion will occur at the water level line and under sludge that has settled in the tank.
The Catalyst has been used in the auto industry for over 50 years, experience, dependable and a well built product. The Modulating control knows how much heat your using and burns at that rate. We do not burn hard to recover water temp and then shut off, we target the water set point (185 and adjustable) and as we reach that target, the burn slows down to stay within a few degrees of target. The control also watches the temp of the cat to prevent over heating of the cat when damage could occur.
TeamWM