[scottz]

Originally Posted by beeje

1- I cant emagine anything but a pad heater stuck to the tanks.
2- Just the holding tanks would have them (I would assume all). Not the fresh water tank
3- Thermostat ? Don't know, but I don't think so.
4- I would think 120 volt for sure.

Concerning the tank heaters on my Montana (can't speak for other models):
1. Yes, they are pad heaters
2. All of my tanks have heaters; switches for black, fresh and gray (one switch for both gray tanks)
3. Yes, the pads have thermostats
4. They are 12V.

These photos show the heater on my fresh water tank and the switches.