I live in a thermodynamically-complicated, super insulated (generally R-28 walls and R-56 ceilings), South-facing, tri-level house (cellar @ 1500 sf; 1st floor @ 1500 sf, and loft @ 1000 sf). In 2015, 4 contractors came to provide a quote; only one took any measurements. Three never responded, the fourth declined to bid since I wanted a performance guarantee. In January 2019, I decided to try again without the performance guarantee. It took five weeks, but I managed to acquire three very non-descript proposals. What I have provided below is pretty much the entirety of the technical details (note the absence of wellfield info). Proposal 1: 3-ton ClimateMaster Tranquility 30 for $31K w/ 3 zones & hot water generation; 2 wells @ 225' Proposal 2: 4-ton ClimateMaster TZV-048 for $26K w/ no zoning or hot water generation Proposal 3: 5-ton Bosch SM060 for $27K w/ hot water generation, but no zoning; 750' bore Each contractor was told to do the ACCA design with Manuals J, T, S, D, Zr, yet I get three disparate proposals. Contractor 2 refused to provide block heating/cooling loads without a signed contract and would only provide the wellfield details AFTER installation. Contractor 3 never took a single measurement or asked about any insulation values... and they claim to be IGSHPA certified installers. Contractor 4 (ClimateMaster or Water Furnace) arrived and told me a proposal would be available in a week. After 6 weeks of not responding, they have decided to return next week to presumably start the process over. I'm not surprised because although the 40-year HVAC veteran was onsite for 4 hours, he only measured the outer perimeter. Any advice? Some have suggested that geothermal is not ready for prime time and that I should go with an air source heat pump, but that doesn't resolve the problem with properly calculating the block heating/cooling loads, which are required for any HVAC system.