Hi AC, folks,
I am a new-ish lurker, and have devoured the entire thread, and a large chunk of the rest of ecorenovator over the last few weeks, in search of projects and priorities for upgrading my own home. Looking into ground source heat pumps, I found a very good (it seems) sizing manual from Bard HVAC.
Since I cannot post a link yet, just google the following string (without the quotes): "bard hvac pdf 2100-099(N)"
http://www.bardhvac.com/digcat/volum...100-099(N).pdf
It will be the first PDF you see on the results.
Separate question: does anyone know of a ready source for ground temperatures in the southern Maine/NH area?