Ours is a 2012 3402RL, and it came with a Dimplex fireplace. I don't know what your rig will need to install one. As far as keeping plumbing from freezing, we have been in single digit temps and the furnace kept the pipes from freezing, of course, we were going through a 7 gallon tank of propane every two days when it got down that low.
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Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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