[joey]

Lateral lines are the best way to go unless you are limited on space or in a severe climate condition , it uses more electricity to pump 300 ft vertical than 1000 ft horizontal , Here in Ga and at my home we had a large lake , pond or what ever you want to call it dug for our hvac system ,so we get excellent cooling plus fishing, and it looks great too, Id say in the 30s is just about right king for a good system, don't forget if your just building to get lines laid under your garage floor for free heat and cooling there too.