maple1
Minister of Fire
I have been assuming that the LP HVAC mentioned above was capable of heating the whole house - which also seems the implication of the stated desire to only supplement the LP.
If money is put into proper insulation & air sealing, that will pay future dividends forever no matter the heat source. Example - if the rim joist area wasn't done correctly, just insulating & sealing that up would make a huge difference. We don't really know much about the HVAC system, but you should also be able to direct the heat from that to areas where it's needed the most by opening & closing the related registers or the like. Or if worst comes to worst, run a short duct to the office space if the ductwork doesn't reach all rooms or areas.
Part of making a big $ decision like this is knowing fully where you're at now - which I don't think is quite the case here yet without spending a winter with it & seeing how the fuel usage is & where attention might really be needed the most. It might be possible that even if you do put a pellet stove in, you'll might still not get the warmth you want or may send a lot of your pellet heat out thru the basement walls.
If money is put into proper insulation & air sealing, that will pay future dividends forever no matter the heat source. Example - if the rim joist area wasn't done correctly, just insulating & sealing that up would make a huge difference. We don't really know much about the HVAC system, but you should also be able to direct the heat from that to areas where it's needed the most by opening & closing the related registers or the like. Or if worst comes to worst, run a short duct to the office space if the ductwork doesn't reach all rooms or areas.
Part of making a big $ decision like this is knowing fully where you're at now - which I don't think is quite the case here yet without spending a winter with it & seeing how the fuel usage is & where attention might really be needed the most. It might be possible that even if you do put a pellet stove in, you'll might still not get the warmth you want or may send a lot of your pellet heat out thru the basement walls.