[Denny and Angie Miller]

I have a 2017 353RL Montana High Country. On the interior electrical control panel I have a switch labeled "Tank Heater". I checked the owners manual, and as suspected, no mention of it. My questions are:
1. Is this a pad heater?
2. Which tanks have heaters?
3. Is there a thermostat involved, or is the heater always on if the switch is on? If a thermostat is involved, what is the setpoint, and is it adjustable?
4. Is the heater 12v or 110v?


Thanks for any help