It is not a fire hazard. The electrical is grounded and works on a timer. There is an element that heats the lava rocks to 170 degrees. You can create steam by pouring water on top of the rocks. As with anything electrical you wouldn't let children or adults touch the stones as they will be extremely hot to touch.

I saved a lot of money since I worked in the Granite field at that time, I went to my boss and asked him to show me which slabs of granite he had trouble selling, or has had in stock for a while. By fabricating and installing it myself (I just so happen to be the CNC guy) I was able to get it for about a car payment. We chose to purchase unfinished cabinets from Lowes and stain/lacquer it ourselves. This was also a big cost savings. I extended the depth on two of the uppers and took out the plywood in the door and replaced it with glass that I tinted (auto tint). Natural travertine tile floor and back splash was fun. I knew I was saving money by doing the work so I decided to buy a nice tile saw with a moving bed from Home Depot. One thing I learned from all of this is if you are going to do your own work and not hire it out, save the headaches and buy some good equipment (or rent). I did, however, hire out the plumbing and electrical.

The funny part is, I designed this when I worked first shift and drank, now that I work nights, I have no desire to drink! I still go down there and think about the memories of building it.