Geothermal quotes and insulation options
We plan to break ground by the fall on our new home. We are seriously considering geothermal and have a few quotes to share. It seems natural to include our ideas about insulation in this conversation as well. Our home will be 5200 sq ft one story with walk up attic on a crawl space. We are located outside of Raleigh, NC on a family farm. We are looking at an insulated, sealed crawl with all duct work here. Also, we plan to have 2x6 exterior framing with blown fiberglass insulation in the walls (+/- zip sheathing) and good air sealing. Also, planning on blown fiberglass at the ceiling level in the attic with radiant barrier. We considered foam, but it seems overkill in our area and our roof deck is huge.
3 recommended geothermal contractors were highly recommended by energy raters in our area.
#1... 2x3 ton climate master geo units, 3x375' vertical wells... $49,800 ($26460 after tax credits)
#2... 2x3 ton Bosch ta 035 2 stage geo units, 3x300' vertical wells...$48,900 ($25830after tax credits)
#3... Water furnace series 5, 5 ton dual capacity, 3 zone, horizontal closed loop.... $34,480($15736 after tax credits)
Conventional quotes for comparison.... #1... 2x3 ton 15 seer climate master $20,400
#2... 2 15 seer 3 ton systems (Johnson controls, York private label) $24825
Want do I need to consider? Do these numbers look reasonable to you all? Any feedback regarding vertical or horizontal wells?
Thanks in advance!