I received a quote for Trane vertical ground loop system as follows: Trane T2GX 5 ton system 5 Ton Vertical loop per IGSHPA standards (fully grouted) 2 pump flow center Nexia 850 2 Stage compressor ECM blower ProCool Geo thermal fill All necessary labor and material to connect to an adequate electric panel, sub panel and wiring included in the cost (panel is currently full and have Natural Gas Furnace) High Efficiency 2” Merv 11 filter Insulated plenum and return air drop. Base pad and foam sound pad under geothermal unit Canvas isolation connectors. Vendor didn't yet provide design specs for his Manual J, this was the quote he sent prior to our discussion. Manual J from another vendor arrived at 39,500 Cooling BTU and 72,400 Heating BTU which seems low on the cooling. Have a 100kBTU 78% trane gas furnace that provides more than enough heat, so the Heating BTU seemed correct. Current 22 year old 4 ton Trane runs the better part of all day during 90+ degree days. My house is probably around 4200 Sqft finished living space including basement. Have over 22 windows and 3 patio doors, but all are high efficiency Low-E High SHGC windows. This was around 27K pre tax incentive. Hot water option was around $1400 and installing 50gal buffer tank was around $1000 I haven't talked to them about this yet, but they offered an option for one additional ground loop - what would be the pros/cons of this? Is this an "in case you spring a leak" thing? Live in Northern Kentucky / Greater Cincinnati area. Awaiting a quote from 2 other vendors that sell Waterfurnace as well. Thoughts? Warning signs? Thanks!