What kind of furnace is best for my home? I have forced hot air now.
I live in Maine, have an 1850s house (reasonably well insulated with cellulose in walls and spray foam in attic ceilings and round the sills in basement. Having trouble getting my chimney lined because of an angle in the masonry. I use wood heat as a secondary source from another chimney. Have to replace old oil furnace because of some rust on heat exchanger. Geothermal, oil, propane are my options. Thanks
I simply recommend you get a proper manual J and D worked up and crunch the numbers.
If it is a well insulated house you may be fine with a heat pump or you may need a propane unit. Oil prices are pretty volatile, you have certain storage issues and it's generally dirtier than the other options.
Very rarely do I see situations where the costs work out on a geo-thermal unit but you won't really know until you see what it will take for your house.
For more information:
Read "Should I get a heat pump with or without a RCC?" a Q&A answered by Rich Franz-Under.