I live in a 9000 sq foot house... I worked out; In the summer; I spent an extra $4000 to cool my house In the winter, I spend an extra $1500 to heat it. I have RUUD HVAC's. 90% efficiency. 12 years old. 2 x 4 ton, 2 x 2 ton. One of the 4 -tons in the Attic has finally given up so I started looking for ways to impact my cooling bill (mainly). I was unimpressed at not being able to find ANYONE here in ATLANTA to help me? I get a constant 45-50 degrees from the RIver (150 ft away) that I use to water my yard. Surely, an open loop, pump from the river and let soak back through the ground back to the River. I could even use the same pump (with MAS-Control demand system) that I use today to pump the water on demand for my irrigation. My summer cooling bill could be zero Seriously, any places I could start and find someone that knows how to do it and WANTS to do it?