Thanks laura. That helps and confirms a suspicion I had. Your low night time temps were chilly on the 18th-20th, but your daytime temps are balmy, almost 60F. You are not getting enough draft and the wood is suspect. With stronger draft you would get more heat at a lower thermostat setting. One year oak is worthless for fuel. It takes a few years to season. Madrona takes at least 2 years. With stronger draft the stove may be more tolerant of oak. I suspect that the dealer's chimney is taller maybe?
Here is what I would try. It's cheap and should be pretty conclusive. Have the dealer remove the barometric damper. It is unnecessary and a potential source of leakage. Then have the dealer remove the cap and cram a 3-4' piece, crimp down, of single wall pipe into chimney. It will look like sin, but this is just for a day or so of testing. Get yourself a load of construction scraps (dry 2x4 and 2x6 cut offs), or some pallets and cut them up into stove sized wood. Start a fire and once the wood is going well and the stove cat is over 500F, close the bypass. As the cat temp rises, close down the thermostat to about 1.5 on the dial. I think you will have good heat. If this works, buy some pine or some known dry wood like this and save the oak for next year.:
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