I am in the process of upgrading my heating system. I currently have an oil fired hot air system...with central air. I looked into upgrading to a boiler with two exchangers to zone my house along with two heat pumps in a hybrid system.
I am also getting prices on a propane hybrid system as well though the bids are slow coming back.
So... after all of this I come back to Hallowell again... it does seem too good to be true.. so I really would appreciate it if someone out there has their system if they would give me some input.