I was doing some work to my plumbing in the underbelly and I did not notice any duct vents to heat my underbelly? I'm wondering if I should be cutting some of the flexible ducting and putting some sort of vent in to keep my tanks and underbelly heated. We do a lot of cold weather camping so I want to make sure nothing freezes.
Might help some if you posted make and model of RV you have, since it's not listed in your profile.
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Dan-Retired California Firefighter/EMT
Shawn-Musician/Entrepreneur/Wine Expert
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
4pt Equal-i-zer WDH and 1828lbs of payload capacity
Do you have " 12V Heat Pads" on your tanks and valves? Are any of your Water lines in the Belly? If heat is needed in the Belly they "Normally" supply a Outlet in the needed area "Water Pump/Filter/Control Center". If you are going to "Cut a heat duct run in the belly" make sure you have a BIG Propane supply! Youroo!!
It may be that duct work is left uncovered so that when the duct get hot that heats the underbelly, radiant heat. I would not cut a hole in the duct unless I was going to install a larger furnace
I was wondering if it was heating it by radiant heat. My friends trailer, different brand, one of the floor vents in the living area has one end open to heat the underbelly or they forgot to close it up during construction?
We don't have heating pads on our tanks. The main reason we got the wildcat is because all of the pipes are in the underbelly with only the smallest portion sticking out. I cover the 3 waterlines with foam insulation when we camp and I put about a 1/2- 1 gallon of antifreeze in each empty tank to fill the drain lines and try to protect the valves. Last year it got below 20 for a couple of nights in a row and we had no issues except went through some extra propane.
Youroo!! 
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