We are going to build an outdoor shower and I have a water source to tie into (cold water). Of course, I want hot water, so we need to determine how to heat it. We already have the outdoor fixtures we want to use. Now I just need to determine how to heat the water (propane is what i am assuming) and which system to purchase to accomplish this because I want to hook it to fixtures, not just have a box. We are looking at permanent not portable. It will be visible, so I want it to look nice. Any suggestions on what to use and ideas or pictures of how you did it? Thanks!