Last night I picked up the next thing I need for the controller, wire! It seems simple enough. I needed something with 3 conductors (wires) for the temperature sensor at least 25 ft long to make the run from the attic to the kitchen, and I wasn't exactly sure what I was going to use when a friend suggested network cable. That had way more wires than needed, so I found myself a 50ft length of telephone wire with 4 conductors. I even found it in a color that'll somewhat match the color of the chimney brick.