Originally Posted by TheLonePine
We decided not to add the pads as we rarely use hookups and we thought we would be safer draining the system by October and managing without fresh water in the tank. We have done this with our current trailer up until now.
I skipped the heat pads due to their rather high power requirements (100W per pad was my understanding). Too much for an ordinary battery supply when boondocking.
However, I worried about the various pipes that are below the floor, as they would have very little thermal mass. On the E-21, I noted about 4 to 5 feet of exposed (before spray insulation) hot and cold pipes running from the bed to the kitchen. ETI has agreed to install some low voltage heat tape if I supply. Here is a link that may prove useful.
I currently have placed a request for a price quote.
The grey and black tanks can be treated to a little RV antifreeze easily enough if freezing conditions are expected. The fresh water tank should be fine if a portion of the day is above freezing and if the trailer is heated. In an extreme case, you can add your favorite fresh water antifreeze - Jim Beam
or even Aberfeldy 21yr Single Malt Scotch, Speyside
, if you're particular.