Explain Jayco's "Thermal Package" to me

[Blue Grouse]

From Jayco's website: "THERMAL PACKAGE"
Insulated, heated and enclosed underbelly and 2-sided reflective foil insulation in main roof and slideout roof
We're looking at the Jay Flight series of TT's, especially the 22FB. Since we plan to use it in cold weather on occasion, the Thermal Package option seems like the way to go.

My main question, is the underbelly with all of the piping really "heated"? Since we will do some boondocking, I'm concerned about how the pipes are protected from freezing.

Thanks!

[cekkk]

I hope you can get a four seasons package. That was a must have that we had to do without. We were told we could get thermal windows, but that Jayco had discontinued the Polar Package on TTs when we got our 2011. I'll be following this thread to see what's available. I've read it gives you about ten degrees of protection below regular insulation. Have no idea if that's accurate.

[edatlanta]

The specifications on the Polar Package on my 5'er claim protection down to zero degrees. I hope I never experience that temperature, but I have seen 13 degrees several times in two winters of full timing. The big thing that I love is the dual pane windows and no condensation on the windows during the winter. I just don't have that problem regardless of what I am doing inside.

[norty1]

When the furnace is running, there are hot air ducts that feed heated air into the (semi) sealed underbelly. This warmer air is intended to keep the pipes and tanks above freezing.

If you do not use the furnace in winter and use the fireplace or electric heater, all bets are off.

[dalenoel]

If you are driving and the furnace is off there is no heat and the pipes and tanks will freeze.

[Rob_Fla]

Originally Posted by dalenoel

If you are driving and the furnace is off there is no heat and the pipes and tanks will freeze.

Guess we will have to wait until the temp gets above freezing before moving the 5er !!!!!

[Wyotraveler]

Originally Posted by Blue Grouse

From Jayco's website: "THERMAL PACKAGE"
Insulated, heated and enclosed underbelly and 2-sided reflective foil insulation in main roof and slideout roof
We're looking at the Jay Flight series of TT's, especially the 22FB. Since we plan to use it in cold weather on occasion, the Thermal Package option seems like the way to go.

My main question, is the underbelly with all of the piping really "heated"? Since we will do some boondocking, I'm concerned about how the pipes are protected from freezing.
Thanks!

On my 19RD Jay Flight and I also suspect with the 22FB the tanks are heated. The black water valve is also inside the heated area. The grey water valve is not. When I picked up my 19RD from the dealer (new) last December it went down to 10 degrees at night. Everything was OK except for the grey water valve. Ice formed at the valve and could not be drained. The dealer warmed it up and there wasn't any damage but still it is not truely a 4 season TT and I'm not sure I would trust it down to zero degrees with the grey water pipe and valve being outside of the heated area. I wrapped my grey water pipe with insulation and duck tape but not sure that is the perfect solution. If I ever have to get into the heated area I am change the way the grey water pipe is mounted.

[Dieselknudt]

We have a Designer 3310 with the "Thermal Package".
Our trip outwest is planned for just over 3 weeks and I see that temps are supposed to be mid 20's at night and 40's during the day.
Should I be worried about making sure that I run the furnace at night? I kind of like it cold and was just planning on running morning and evening to take the chill off.

[o2silverado]

We just purchased a 2018 jayflight with thermal package . So far I have not noticed any major difference opposed to not having a thermal pkg. The trailer still gets hot when the the sun beats on it & the furnace runs quite often when cold . My dump valves are located below the enclosed underbelly so I'm sure they would freeze . I personally would not chance anything below 32° without taking further precautions.

[wags999]

Originally Posted by Dieselknudt

We have a Designer 3310 with the "Thermal Package".
Our trip outwest is planned for just over 3 weeks and I see that temps are supposed to be mid 20's at night and 40's during the day.
Should I be worried about making sure that I run the furnace at night? I kind of like it cold and was just planning on running morning and evening to take the chill off.

The only heat you will get in your underbelly is from the furnace. At those temps I bet you will run your furnace more than you think you will. Even with an electric space heater you need to run the furnace to heat your underbelly.

Happy Camping

[Atlee]

If your proposed 22FB actually has floor heat ducts, it probably does have ducted heat going to the holding tanks.

The model the 22FB morphed into, 23RB, did not have floor heating ducts, and therefore does not have heated tanks. The 23RB has all the other stuff that goes with the thermal package, except heated tanks.

Originally Posted by Blue Grouse

From Jayco's website: "THERMAL PACKAGE"
Insulated, heated and enclosed underbelly and 2-sided reflective foil insulation in main roof and slideout roof
We're looking at the Jay Flight series of TT's, especially the 22FB. Since we plan to use it in cold weather on occasion, the Thermal Package option seems like the way to go.

My main question, is the underbelly with all of the piping really "heated"? Since we will do some boondocking, I'm concerned about how the pipes are protected from freezing.

Thanks!

[Roadtramp99]

I just went thru winter in Northeast Ohio. Temps down to 10 to -4 for a few days at a time. Mostly teens or single digits for January/February. My jayflight with the thermal package did amazing. I had heattraced water line , I heat taped, insulated and wrapped sewer line with a tarp. No skirting. Nothing froze. A 30# propane tank lasted 5-6 days and could of gone more ( had some left when I filled them ) But didn't want to cut it close and run out. Simply proud of my 2013 26BH . I travel for work and have used in Tennessee, Kentucky Virginia winters but this is furthest north I've been in it. Super happy w my Jayco. Neighbor at KOA has a large Montana 5th and they had frozen pipes, with skirting and supposed 4 season package . Way to go Jayco 💪