I didn't put mine in, but watched like a hawk while my builder put it in. The chlorinator + flow meter are probably 12 to 14" long with 2" outside fittings, so you will need that much space.

The electricals are quite easy. The system comes with 2 sets of wires that plug in. A white wire set, about the thickness of a toaster plug, runs the chlorinator and is prewired at the chlorinator and plugs into the controller. The flow meter is also pre-wired and has a telephone plug at the other end that goes into the controller.

Our controller is on the same circuit that the pump is on, both controlled by an Intermatic timer. All in all, if you have wired anything in your house, you should be able to do it. The one thing I learned from my PB, clean, then clean, then clean again when you are joining PVC. I would not hesitate to install one myself if I had too (of course, I've seen it done!).