Originally Posted by Oregon RR
Do you have to worry about getting warm air to your water, gray and brown water tanks?
I'd love to use my little propane heater all day and evening, but if below zero, I need to be getting warm air to the tanks via the furnace to avoid freeze up.
My fresh water tank has a tank heater.
All pipes outside the living area have pipe heaters on them (there's not much), including all low point drains.
The black and gray tank drains have pipe heaters on them, right near the blade valves.
During cold months the first liquid going into the black and gray tanks is anti-freeze. Those tanks are not heated, but a combination of the anti-freeze and that, if it does freeze, it has room to expand without breaking anything has been working for us.
BUT, we have not been to zero or below, and I don't intend on it either. IF we were in a situation where we were likely to see temps that low, I would put tank heaters on the black and the gray tanks also.
Tank heaters and pipe heaters are 12v dc, and draw very little amperage.