Durango said:The smallest Garn has twice the output of the largest US sold Froling so it is a bit difficult doing a direct comparison.
1500 gallons of storage is a going to cost a lot, I do not have my figures to hand but I think the 1500 is about $14k
Installation is cheaper because it is one box, for me a major saving is the ability to vent horizontally and avoid a few thousand on a suitable chimney.
The Garn Barn is a wash, I need to put whatever I have somewhere, the separation of boiler and storage may make it more practical for others not to need a separate building.
The Froling is more high tech, more efficient, has an auto feed model, pellets, but that one is seriously expensive.
Chalk and cheese.
Basement boiler vs outdoor boiler is apples and oranges (or chalk and cheese).
I grew up and live on a farm in New England and have done my share of working outside year round.
However, I would have a hard sell getting my, imported from out of state professional type, wife to go outside and feed a garn.
A basement install of a smoke free Froling or Tarm is VERY civilized.