Each line is one continous 250' loop that can be shut down individually. I have it hooked up to a water heater, last year there was no insulation in the ceiling so it do not work properly. This weekend I putting in R40 in the ceiling and turing on the heat to start warming up the slap. Hardest part is getting it up to temp, once it's at temp I'll know if the water heater was a good idea.
heres a couple of pics of how things look now.
