Can someone check my calculations below: Proposed 2 ton system I read for an open system that the Average water use is 2.5gpm per ton x 2tons =5gpm Lets say I run the system for 10 hours a day 10hrsx60min/hr x 5gpm = 3,000 gallons per day Im trying to figgure out whether a ground closed loop system or an open based system would be more economical. Obviously open loop requires a LOT less labor, but where to put the water becomes an issue, dumping 3000 gallons a day anywhere on my property will cause lots of errosion unless I use some kind of drip system I have not though of. I could dig a pond, but there goes the costs savings of not having to excavate. I live right outside of charlotte, nc, anybody care to tell me which system is going to be more economical short term and long term? thanks!