Geothermal - how to choose a contractor
I desperately need help in choosing a qualified geothermal installer. I initially began this process by looking to install central A/C in my 2,080 sq. ft. home.
There are no ducts and the heat is via electric baseboards so that got me on the path of pursuing a heat pump. Then someone told me to look into geothermal systems so I started getting some estimates on a conventional, water-source geothermal system. Then I was told I needed to get a direct exchange (DX) geothermal system so now I'm looking at those.
As far as geothermal systems are concerned, the people I've talked to definitely push the product they sell (as well they should). I've talked to about 5 water source system installers and 3 of them didn't know what a DX system was. One even tried telling me that the Waterfurnace unit they sell is a DX system.
I've only talked to one DX system installer so far and of course he says a DX system is better. Meanwhile, this guy is going to sell me 2 Nordic systems (one in the attic for the 2nd floor and one in the basement for the first floor) with the drilling, trenching, ductwork, installation of units for $25k. I've only gotten one quote so far from a Climatemaster installer and they were at $36k for all the work with just one system - which would be ductwork would have to go up through drywall and we'd have to do a lot of patching/soffiting.
The 2 systems seem ideal but the $25k price seems almost too low for all the work and this installer has only done 3 installs and started 2 years ago.
1. How do I go about finding someone qualified? (i.e What questions should I be asking?)
2. Which geothermal system is better?
Any help/guidance would be appreciated.