Our train yard sits between the Elyssian Park cliff and the Los Angeles river, and on cold nights the icy wind off that canyon finds its way right to the platform where my crew is faithfully cleaning the Gold Line trains as they come in from service.  These heaters really take the edge off the cold, and the little table gives them a place to put their steaming coffee mugs while they wait for the next train to arrive.  The heaters were easy to assemble, easy to operate and to maintain.  You definitely want to fill up the bottom with sand so that the wind doesn't blow it over.