I have a two-story home with separate HVAC for each floor and am seeking a geothermal system for the first floor, app. 1000 sqft. Based on my research, St. Louis does not offer a lot of choice on experienced geothermal installers (would be happy for someone here to provide me wrong). I have several bids and have narrowed the field to two providers, which I'll call Experience and Budget: 1) Provider #1 - "Experience": $37.4k - Geocomfort 3 ton GYT036 - April Aire M-13 air cleaner - Aprilaire Bypass Humidifier - Air Scrubbers - Geocomfort desuperheater - 40 gal. Bradford and White Energy Star gas water heater and expansion tank - 50 gal. pre-heat tank - 3 x 200’ grouted wells - Honeywell IAQ thermostat - Flue liner for water heater (exhaust gases from the water heater exit through an adjacent chimney) - Electrical and intake mods, excavation, labor, permits, & inspections - 10 year parts, 1 year labor warranty 2) Provider #2 - "Budget", Proposal #1: $25k - Water Furnace 3 ton LDV036A1114CT - 3 x 150' grouted wells - Labor and connections (not including electrical wiring) - Does not include electrical modifications, no intake mods needed - Permits and inspections - 10 year parts and labor warranty 3) Provider #2 - "Budget", Proposal #2: $34k - Water Furnace 5 ton NDV0646111CT - 5 x 150' grouted wells - Rest same as #2 Provider #2 gave a third option for $48k with a Water Furnace 7 (NVV060111CT) + duct mods to handle increased volume, but I didn't really take this seriously. Some on this forum use a Water Furnace 7 to handle 3k-4k sqft. houses, so I think I was just put on there as a money grab or to create extreme contrast with their other two proposals. A Water Furnace 7 looks like serious overkill for 1,000 sqft., even if its variable compressor means fire-and-forget. The two providers were dramatically different. Provider #1 is a decades-old HVAC provider coming from an engineering background, and so their emphasis is on high quality design and results. For instance, Provider #1 insisted that 200' wells were most appropriate based on climate zone extremes and decades of local install experience. Provider #2 is a green tech. HVAC company less than 20 years old. They proposed several Water Furnace options, without necessarily considering whether they fit well. It's plain this forum tends towards Water Furnace over GeoComfort. There's a $12k difference in price between proposals #1 and #2, but this distance shrinks to ~$3.5k if one considers the #1 includes a water heater, desuperheater + exp. tank ($2-3k), flue liner + install ($2.5k), full-service electrical and carpentry work ($1-1.5k), and air scrubber + humidifier ($1.5k). Bottom line: St. Louis doesn't appear to offer a lot of geothermal competition, so this appears to be a classic Budget vs. Experience choice. Provider #1 is clearly more experienced, but is the extra cost worth it, especially considering that I've seen 3 ton systems with similar accessories in the $28-32k range elsewhere on here? Or should we go with Provider 2's $25k proposal and add accessories, figuring that the generous warranty will cover any provider shortfalls?