Howdy fellas. Got a couple of noob questions. I have just finished the rough framing on a 50'x50' shop. I am looking for any recommendations on a high efficency water heater. I don't really need a lot of capacity really. I just have a toilet, a hand sink and a shower(that will rarely be used I imagine) I am running lp gas to the shop if that helps. I am also at about 5500' of elevation. Thanks in advance.