House is 1800 living space and 1200 basement forced air system. Northwest Pennsylvania. Loaded once a day. Reason this size is due to adding on a 28x32 two story garage. Once weather breaks.
Yep, overloading the stove. .. first let's make it clear I am not saying this is your fault or that you should have had this issue
but here is the deal with how most gasification operates. If you buy a gasification unit it must be sized very close to what it's actually going to be doing. If your heating 1/3 the space the stove is rated for and then enjoy the benefits of the potential 24 hour or longer burn times issues could arise.
With such a low heat draw on such a large stove, I would advise you to get on a 12-15 hour burn schedule and only use enough wood for that amount of time. What's happening is that the stove being full of wood is producing a lot of syngas which is just wondering around in there because there is such low demand on the furnace
In conventional boilers, this isn't nearly as important but in sizing gasifiers, proper sizing is most crucial