Huge open ended question. P.s. some goofy response will follow as it logged me in as a different name.
More effort in the question gets more effort in the answers. Really we have not clue what your requirements are. So I should just answer "maybe". Otherwise you want us to compare/contrast loopfield types under the known range of soil/climate/building variations?
Yes they work well. Sky Heating is useing them in the pacic northwest where there is enough overburden above the bedrock to get it done. He claims less intrusion then conventional digging would produce as loops go out of a common pit in different directions. 1 important note: the correct choice of loop is allways about economics. any loop will work given enough loop length installed. The right choice is about the money. Eric
The last time I read about horizontal boring I thought they were still having problems achieving good soil contact with the pipe. Maybe they got this resolved now by using a modified method? It's probably 2+ years since I read the article.
One should consider grout with horizontal boring depending on soil type. Boring is worth it to some to avoid lawn tear up. We have used it for the loop field and also to bring headers under landscaped lawns. It all works, how much do you want to spend.