Ever Since we've bought our new house, we've been remodeling and have only been using one zone out of the 4 to heat our house. Now that we're getting closer to finishing the house, I've been thinking about how I'm going to control my zones. I've read that a constant circulation (variable speeds) in the zones is a great way to keep your temperatures constant, but a lot of set ups I've seen are zoned and only circulate when called. What is the ideal set-up for geothermal zones? Multiple variable circulators which means a constant draw on electricity, or one circulator with multiple zone valves which only cycles when called?