Hello to all on the forum. I need some information on an Intertherm heater. It is model # UGC 1000-7. It is 220 volt, and needs a thermostat in the circuit. I would like some feedback on what brand or type of thermostat to get. The units are small, measuring 22" W X 14" D X 3.5" tall. The output grills and control knob is on the 3.5" face, on the 22" width section. It has the water and anti freeze unit inside with blower motor. I have no idea what the BTU's would be. I am going to install these in my motor home, a perfect size. I wonder about a few things. What would the installation clearances be, can they be installed vertically if needed, ( long side)? I intend to travel west, so these two units should be fine, and its my hope to not have to use the propane heater unless I wind up in a really cold location. Any advice greatly welcome. George E