One thing to keep in mind RE heat pumps is they are designed to run constantly, it doesn't mean it's chewing electricity. They don't do the on/off cycles that furnaces do. Furnaces are injecting much warmer air into the house to average off the temp whereas heat pumps are pulling heat out of the air to maintain a temperature. If you put your hand over a vent it'll feel much cooler from a heat pump vs a furnace.From the top of the stove to the chimney cap is about 18ft. I have Duravent DVL double wall chimney connector going into triple wall class A chimney pipe. I have had to be careful not to over fire it doing hot reloads. My first attempt for and all night burn was a complete fail. I stupidly loaded a really hot stove with way too many splits that were too small. When the temps kept rising and I noticed a faint glow between the cook plate and the flu outlet, I capped the air intake with aluminum foil, and luckily averted a meltdown! Lesson learned.
Your burn times sound really good. That gives me some hope I might could get a little more out of it. I really like the idea of using some rounds and having some shorter pieces on hand for the top. The rounds might be less likely to over fire and the small pieces might help me to be more gentle on that upper baffle too.
I have compared past electric bills and the reduction is very significant with the addition of the wood stove. Now if I could just get the kids not to take 1 hour showers. The biggest complaint with the heat pump, was when it was super cold you never really felt warm and it would run almost 24/7. The wood stove solves that problem. Even if the heat pump kicks on while the wood stove is going it still feels warmer inside. I have also realized that having it kick on occasionally when the when it is very cold probably helps get some more heat to the back bedrooms. The colder it is outside the bigger the temperature difference gets since the stove is on the far end of the house and bedrooms are down a hall on the other. The auxiliary resistance heater in the air handler has turned on zero times this year which is also good. I bought a dehumidifier which helped with perceived warmth. We get a fair amount of rain and high humidity in the winter and the heat pump doesn't dehumidify. Believe it or not, the wood stove doesn't dry the house out enough either. I figured this out with a hygrometer while fighting condensation issues...that could be a whole other thread though.
The good thing, as mentioned before, is we really like the stove, it functions well, and is really user friendly. It honestly does exactly what I bought it for. I somehow got a touch of the "wood heat only syndrome" which I hadn't anticipated. This thread has done a good job of helping me get through that.
Thanks again to all for the helpful advice. I am looking forward to trying several things that were mentioned. I feel like the kind members of hearth.com have saved me from spending some money I may not have needed to.
Heat pumps get expensive when they get below their efficiency rating temp and the backup resistance heat kicks in. THAT is very very pricey. For me that's 37 degrees...newer/special model ones can go lower. So on 45 degree days I happily let the heat pump chug along and save my wood but when it dips below 40 I have the stove going.
I have solar panels, a heat pump, and a wood stove. Since I live in MA and we have 4 distinct seasons I think its the perfect setup.