Steve, we really like the heaters, they will provide a great way to keep our engine rooms from sweating down here in north central Florida where we see many nights drop down into the 30s and then warm up in the days to the 80s.Your heaters will keep our engines looking great for years to come because no condensation means no water spots or rust. Best of all no fear of explosion due to fuel vapors igniting with your ignition protected units. Thanks again, Capt. Bryce Jemison No More Winterizing Worries! These heaters are great; they give you piece of mind!