franco b wrote:We also have to consider firing rate. At a modest firing rate the Oak stove will not have a stack temperature that is excessive, but as firing rate is increased, stack temperature will rise. The extra heat absorbing surface of the extended flue path of the base heater will modify this and efficiency will remain high over a wider range. It will have a higher output with modest stack temperature in a stove very little bigger than the plain Oak.
The design with the fully enclosed fire pot will also benefit from the higher temperatures in that combustion chamber which in turn will require less air, which in turn will lower stack temperature.
I agree. A good quality Oak stove will do just fine at a moderate firing rate. If you read about my little test with the Glenwood No 9, I ran it at a high firing rate to see what would happen. Needless to say it passed with flying colors. For Bituminous a Hotblast Oak such as a Germer, Florence or other similar model would be very hard to beat.