On the T.V. program, Richard installed tankless hot water heater, which I have just installed for my house and new 2nd floor addition. At the end of the install, he suggested a motion sensor switch to activate recirculating pump. I would like any information on the type shown. It was more attractive than your standard (lighting sensor switch). I also want to rough in the wiring and need to know if it is low voltage(like a thermostat for pump) or regular romex 14 gauge. Thank you for any help.