Besides the Rockwood and Flagstaff, I think the Surveyor models are similar. The Surveyors come with enclosed underbellies, and foam insulation around the pipes that come through it. The furnace ducting runs through that area to keep the tanks somewhat warm. But......I don't see what is to keep the low point drains and a foot or so of the black and gray dump pipes from freezing.
Chap
|