I hope I can get some good advice here.
I recently purchased a dream house on a deep pond in Massachusetts. It is a ranch-style house surrounded by a state forest - only 8 other houses on the pond.
We have an oil boiler that is from the mid-1970's, and it needs to be replaced.
Simplest thing to do would be to replace the boiler - one suggestion is a Burnham v84, Beckett burner, and an indirect water heater.
I'd love to go geothermal, but it would be prohibitively expensive unless if I were able to use the pond - either a closed pond loop or open loop. The waterfurnace brand name has been tossed around. I am guessing this would cost 4-5x the cost of the replacement oil boiler. Digging a new well for a heat pump would add another 20k - not possible.
The other option is putting in a Propane boiler and a tankless water heater. I'd be able to shut the boiler down 6-7 months a year and save quite a bit of money.
I'd appreciate your thoughts. I'll never leave this house, so I can think long term.
I also wonder if anyone out there has had difficulty with municipalities over putting a closed or open loop in a pond that borders a state park. Impossible?
Does geothermal always require a backup?
Thanks for any advice.