Looks like you're looping your geo coils in the lake? How far down did they bury them INTO the lake?
How many ton system did they slap in? Any zones?
I found out it was a six ton system...which is a little more than our house requires...I was told that our system will be a little more effecient than it would normally be because of this...so that's cool. And like I said, no zones, however, I was told they set the system up to easily convert to zones if we felt that down the road it was necessary.
And our thermostat is pretty kick ass. It's the most high tech thermostat I have ever seen. It's large and all touch screen. Pretty cool stuff.
We probably have the same thermostat... we went for 2 zones (upstairs and main floor), and when I asked about adding a 3rd zone for the basement (the circuitboard is capable of 4 zones) the guy said it wasn't as easy as it sounded because all of the ductwork would have to be re-ran. I guess separate zones require separate ductwork?
I was kind of underwhelmed by my apparent "savings" in the winter time. Mainly because I thought wow... if I'm saving 40% on this energy bill you're telling me it would be $400+ instead of $300???
Summer bills are definitely lower. Way lower than even my 1200 square foot house was with a higher thermostat setting. Maybe that's where the big savings come in and it just averages out over a year.
I'm not up on the specifics of zones...but from what I was briefly told on Friday, dampers are involved...or they can be involved. Not sure about the separate duct lines. But he did say that you could cool one floor and heat another at the same time...so I guess you'd have to have separate lines...but I don't think we do. The next time I talk to him, I'll ask him about it.
All in all, the process was pretty cool. They connected the coils to the end of the buried lines that run from the water furnace, out the foundation wall six feet underground, down the hill and run and emerge out into the lake in about eight foot of water. They float the coils out to the proper depth, tie some cinder blocks to the coil frame, fill it with an anti-freeze & water solution...and it sinks to the bottom.
They ended up sinking the coils at a depth of about 11'-12'. They should be no shallower than 8' deep year round, even during the dry season for optimal performance.