Actually , I dont know if it is an upgrade or just work.
Currently I am on heating oil with heater vents on the bottom of the walls in each room. Last year I installed a pellet stove in the basement. I thought I would be able to transmit heat thru the un-insulated joist and it would heat the house. Well with or withiut pellets I ran the same amount of heating oil??????

I heat my hot water with the same boiler and I never need to get heating oil in the summer months. Is there a way for me to convert a wood burning or coal burning furnace to my system?

I do not want to pay $500.00 a month for heating oil on this small 1200 square foot unit??????????