Designer 35RLTS and Jayco Talk...Thanks Frank!!

About the tank heaters. ive been fulltiming in my RLTS for a year and a half by Edmonton Alberta Canada. We had a few days last winter that hit 45 below and never froze a thing. The tanks only have some double bubble silver insulation between them and the blank plastic outer cover. To prevent them from freezing i simply teed off of one furnace ducts to a 2" line and drilled a hole through the floor by the h2o tank for it to blow down into.