Hi RinconVTR,
My waste tanks and valves are enclosed...I added a 120 volt outlet to them. I use a mechanical thermostat to control the heater.
I agree, it would be useless in an open underbelly.
RinconVTR wrote:
Got it. I know of those tiny little "personal heaters" and I never would have guessed anyone was using those for an anti-freeze device.
We've had a few people try them at work (indoors...heated office) and they were a joke.
Please dont take offense, but I cannot believe you've found them effective within the unsealed underbelly of an RV to prevent freeze ups. The air temp rise math doesn't work at all, and if you add any air movement from the outside, its simply impossible.
There has to be more to this story.
