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Originally Posted by semperParatus
2:masonry woodstove vs outdoor wood boiler? why?
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As far as the CO2 issue goes burning wood is considered neutral but there is some caveats. You can harvest the amount of wood you need each year which releases CO2. New growth on your lot captures that CO2. As long as the lot is big enough that the new growth is equal to the amount of wood you harvest it's an infinite neutral cycle. That is sustainable as long as a small percentage of the population is doing it, we don't have enough forest on this planet to sustain that cycle for the worlds population.
As far as other emissions go, all things being equal such as efficiency of the unit and the wood you are using an indoor woodstove is always going to be better for the environment. With a OWB you have the additional step of moving that heat from the outdoor boiler into your home and that is typically done through underground pex making them less efficient because of heat loss.
In the real world the outdoor wood boiler has abysmal performance as far as efficiency goes. They don't utilize the fuel as efficiently and the typical user is not using seasoned wood driving the efficiency down even further.
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