Perhaps an odd question but has anyone taken a regular 3 season TT and added the enclosed heated underbelly? I am not too familiar with what they do at the factory for this option but seems like perhaps it could be a doable thing. Can't see it being that difficult to achieve.And then along the same line as that, what about doing the same for the tanks? I know I can add aftermarket tank heaters, that's not a problem. I like winter camping and plan on doing a lot more of it now, especially after no longer bring FT and now have a S&B again. I miss those minus 30 nights in the TT! Haha!But the old Topaz is a mite chilly and has an ice cold floor in those temperatures.

Out of all the members of RV.Net, you would be the one with the best skills of getting this done!From what I hear, the factory installed a thick plastic under the RV and tanks, with insulation in between the floor and sub-floor plastic.Think of those 'for sale' or Garage sale signs that are about 1/4" thick with ribbed plastic. A sheet of that stuff 102" wide and long as the RV. Of course cut outs for the springs, and such. It is attached to the frame and sidewalls. Just don't apply 2" long #10 screws into the grey and black tanks! LOL. Good luck,Fred.

Factory runs a heat duct from furnace down thru sub-floor and into area of tanks so furnace can blow warm air into that areaThen insulation is installed..........usually thinsulate type laid on the coroplast sheets that are used to enclose the underbelly.Coroplast is like plastic cardboard. Big box hardware/sign shops etc.Lots of self-tapping screwsSeal up any openings/seams and call it done.Heat pads are also used for 'heated underbelly'.......either in addition to furnace duct (best method) or in lieu of the duct Heat pads can be 120V AC or 12V DC and are t-stat controlled.

I added Ultraheat tank pads. Electric throw rugs to heat the floor is probably more efficient than the heated belly.

Golden_HVAC wrote:Out of all the members of RV.Net, you would be the one with the best skills of getting this done!From what I hear, the factory installed a thick plastic under the RV and tanks, with insulation in between the floor and sub-floor plastic.Think of those 'for sale' or Garage sale signs that are about 1/4" thick with ribbed plastic. A sheet of that stuff 102" wide and long as the RV. Of course cut outs for the springs, and such. It is attached to the frame and sidewalls. Just don't apply 2" long #10 screws into the grey and black tanks! LOL. Good luck,Fred.Thanks for the vote of confidence Fred! Yeah I've fixed a thing or two in my day for sure.At minus 30 my floor is like walking barefoot on a skating rink. I am familiar with the stuff you describe. Coroplast, I use it for various construction things. I was thinking of using 3 inch lags into the tanks! That should hold really good! LOL!Maybe I should check it out further and do some learning.Of course I could just buy a 4 season Arctic Fox and get it over with too.....

Old Biscuit, it would be nice to find a plan or something on how the factory runs the heat underneath, and just how they locate the insulation and the airspace. More research needed on my part.SmkettnerI've researched those pads you describe when I was FT in minus 34 temperatures. Great stuff and I could do my black and grey for about 750. I'm ok with that.I like a warm floor though, especially when I wander out to the potty at O-Dark Thirty and have bare feet.Now you're in Ca, what's a cold night for you? A chilly 60 degrees? Lol!:B

Adding enclosed heated underbelly. Can it be done?

Old-Biscuit
Explorer III
Nov 04, 2015
Factory runs a heat duct from furnace down thru sub-floor and into area of tanks so furnace can blow warm air into that area

Then insulation is installed..........usually thinsulate type laid on the coroplast sheets that are used to enclose the underbelly.
Coroplast is like plastic cardboard. Big box hardware/sign shops etc.
Lots of self-tapping screws
Seal up any openings/seams and call it done.

Heat pads are also used for 'heated underbelly'.......either in addition to furnace duct (best method) or in lieu of the duct
Heat pads can be 120V AC or 12V DC and are t-stat controlled.
Golden_HVAC
Explorer
Nov 04, 2015
Out of all the members of RV.Net, you would be the one with the best skills of getting this done!

From what I hear, the factory installed a thick plastic under the RV and tanks, with insulation in between the floor and sub-floor plastic.

Think of those 'for sale' or Garage sale signs that are about 1/4" thick with ribbed plastic. A sheet of that stuff 102" wide and long as the RV. Of course cut outs for the springs, and such. It is attached to the frame and sidewalls. Just don't apply 2" long #10 screws into the grey and black tanks! LOL.

Good luck,

Fred.

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Adding enclosed heated underbelly. Can it be done?

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