The problem is potential fumes escaping from a wall mounted propane heater within 10 feet of pressure pumps and elecrtical controls. None of which are explosion proof. My concern is we will blow up the well house if fumes are present and a pump starts up. A pump starts and stops around every two minutes. Tried to tell them they would be better off to use a portable generator and a small electric heater if there is ever a power outage.