I've been building fireplaces my whole life, but I've never thought of incorporating a water heating system to it until now. I've always "showered" with cold water, I'm a tough girl. Thing is, I'm 26 now, I'm getting old... The cold that didn't affect me before, it does so now. So basically you need to make water circulate through your fire, for that you need metal for starters. I've seen coils put through fireplaces and stuff.. Thing is, I've never pay much attention to this technology since it requires heavy tools and materials.. and all my off gird settlements are a few days-hiking distance. So my question is, what is the simplest way possible you've heard or know of how to implement this? PS- I hope I'm not threatening the manly status-quo of this site by asking how to install a hot shower in the wild. I'm asking respectufully. Kiki.