Don't know if there is an actual specifiction for maxium IR wire run. I can tell you from experience what I have done. I extended a IR flasher from my basement (rack location) to a desktop USB ir receiver in my office on the second floor. I would guess the distance to be around 100 feet. I spliced the flasher to 22 gauge 2 conductor alarm type wire. Easy to fish. Never had an issue. Just make sure the IR sensitivity switch for whichever IR port you are using on the back of the RFX9600 is set to high not low. And when you splice the IR flasher you get the polarity correct.