Someone please help me out here. I am reading on other posts where someone is needing to replace his 3 Ton WaterFurnace geo heat pump and is getting estimates of $15K-$22k. I thought that the retrofit installation including all the trench digging and heat exchange loops etc is was caused the price of a geo unit to be so incredibly high but here we're talking about replacement only. I can find 3+ ton geo heat pumps in the $3 - $4k range as a stand alone purchase so how does the replacement get from the low single thousands into the $20,000 range? On the other hand, I see top line traditional airborne heat pump/AC units in the 3 Ton range selling for around $1500 plus installation. I can't help but wonder if we're being taken for a ride here. Someone please help me make sense of this disparity.