I have read many posts regarding old vs new and alot of discussion about "learning to operate" these new stoves I have a fisher insert now and it is pretty straight forward about operation open=hot close=cold. Then I tried a VC Vigilant for a while it had a thermostatic air control and kinda small firebox so when the fire died down a bit tie air opened and burned up all the coals before morning so I put the insert back in. i found a hearthstone mansfield nearby for sale does this stove have thermostaticaly controlled air intake or is it more manual and how do some of the stoves with heat settings operate I guess im asking for a comparison of operational charictaristics of a few of the more popular stoves such as Englander, Pacific Energy, Hearthstone and some others. maybe even some real live burn times.