Based on recommendations I've read on this forum, I'm looking to add an Intermatic T104 timer to my pool pump this summer. However, from the manufacturers website, it looks like there are numerous T104 models available:
Most local stores seem to carry the T104 and T104R so I'm trying to figure out which one I should be looking at.
Also, do most people here install these indoor or outdoors? If outdoors, do I need any other parts to protect it from the elements?