I would like to know the best way to get the lines to/from the OWB into my basement. I'll be doing a DHW and forced air heat installation, and possibly heating a small detached garage too. The way my house it built, it has a stone foundation from quartz rocks. The house is about 135 years old. I have an addition built onto the back of my house that only has a crawl space. I want to put the OWB behind my house. If I go straight to the house, I have to go under the crawlspace. If I go toward the right side of the house, I'll run into my septic system. If I go left, I'll have to be careful digging until I find my well lines and then cross over/under the well lines, which is no big deal. However, if I go left, the left side of my house is also a crawlspace for about 15' into the house so I'd either have to go through that crawlspace or around to the front of the house.
My thought was what I consider to be the easiest solution but I wasn't sure if it would work well. I could run straight to the house in a trench, and then breech the addition's foundation (block) , dig inside the crawlspace until I get down to the hole in the foundation, and then run the lines to the "surface" inside the crawlspace. The best part about this plan would be that I don't have to breech the basement wall as well, since the addition's crawlspace attaches to a bricked over window in the basement. I was already planning on knocking out that bricked over window so I could add a furnace vent in that room.
Would it be perfectly acceptable to run the OWB water lines underground until I make it into the crawlspace, and then bring them to the surface and into the basement through that window? It was my understanding that the water lines are already insulated so being on the surface inside an unconditioned crawlspace shouldn't matter. Any thoughts?