ozy
the only way to really know is to try it
i put a 25kish btu englander in the basement , never runs on high cause it's just too much heat, everyone told me a pellet stove is a space heater so put it in the room you want to heat , it wonk work in a basement , it has to have an aok , it will not keep the upstairs warm , (i'm in a rancher w/ 3/4 basement) , the basement will suck all the heat from the stove , yada yada yada
the stove is right under the kitchen , which used to be COLD , open the cabinet and grap a plate that was 50 deg cold , now the dog lays in there
the liv room , one br and both baths are way warmer feeling (they are all on top of the 3/4 basement) even if i run the stove at the level needed to keep the tstat at 70 , where i kept it w/ the oil boiler/baseboard , hitting 73-74 on the stat was not a problem , the back 2 br's (over a crawlspace) were still in the high 50's on the coldest of windy nights , an little ceramic cube heater would take that edge right off
ceiling fan in every room except baths , box fan in basement on low moving air around , heat radiates through floor into walls , furniture , dishes, me , ect
used 153 gals of oil since jan 1st this year when i started burning , 100 gals in the 3 weeks before that , was burning 5-700 gals per year , trying for 200 yr w/ the pellet stove , that 153 lasted till july when i filled the tank , boiler does dhw as well
stoves getting a bigger vent and aok this week along w/ uber cleaning/rebuild , maybe i will see an improvement
anyways , if you put a stove in your house , it will "feel" warmer
if you have a zoned system now , you're set for a good savings