Our cabin has two temperature controls plus two heating systems, although I wouldn’t exactly call it zone heating, but part of our cabin is actually aged – the original space of the cabin was built way back in the early space of last century. Then the newer space of the cabin was only built about many years ago, you can imagine the difference in how well the walls are insulated in the two different sections. Every one of us find that even if we set the temperature control at the same temperature on the different sides of the house, 1 of the heating systems has to run much longer plus job much harder than the 1 on the other side of the house. You can absolutely assume which heating system gets stuck with all of the work. It’s actually the 1 that has to heat the older side of the house. We’ve had many Heating plus Air Conditioning professionals out to look at the issues we have here however they all say it’s a concern with the insulation, or lack thereof. There isn’t much we can do to help with the heating system running constantly on that side of the house, unless we decide to install some of that blow in insulation that you can get these afternoons. It seems appreciate the aged insulation in the walls of our aged cabin was nothing more than newspapers! Hopefully with modern insulation we will get the heating system issue resolved because it’s absolutely drafty here plus we don’t want to have to update 1 of the heating units every 5 years or so because it’s not running efficiently enough.