Extended Season Camping

It isn’t a “feature”, it is a marketing term. It simply means that the underbelly is enclosed and the furnace has a 2” heat duct poked into the belly area so that when the furnace is running it keeps the belly area somewhat warm. At most, it becomes a 3-season camper.

This is a sticker that was on my 2019 Passport.
 

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How is the Extended Season Heat feature activated?

Welcome to the forum.
Are you asking about the nomenclature or are you asking about turning on tank heaters? If you create a signature with year and full model name & numbers it will aid in getting more focus, relevant answers.
 
In a previous camper I had (Keystone product), it had a "Winter Barrier" package. All that meant was, the water pipes that ran under the floor of the camper were positioned near the heat ducts that also ran under the floor. In that trailer, there was no open heat duct under the floor.

Now, I have a 4 season fifth wheel, that has a heated underbelly run by the furnace.

Either way, in order for you to have some cold protection the furnace has to be running.
 
How is the Extended Season Heat feature activated?

I’m pretty sure it activates on its own somewhere around Palm Beach County…South of Juno Beach…at least that’s where are feature kicks in…but it isn’t fully activated til we hit the Keys….are unit is a 2020…yours could be different
 
I’m pretty sure it activates on its own somewhere around Palm Beach County…South of Juno Beach…at least that’s where are feature kicks in…but it isn’t fully activated til we hit the Keys….are unit is a 2020…yours could be different
Thanks for the laugh!
 
2019 Keystone Pathfinder ??? Is that your tow vehicle or your trailer ???

The "winter season package" has been called everything under the sun by various RV manufacturers. Names like Polar Package, Arctic Package, Cold Weather Camping Package, Four Seasons Package, and too many others to mention....

One telling aspect of any "package" is that there are usually some association with "grandeur" that come with the name.... Most are "boastful and wishful thinking".... But, in your trailer, with the name "Extended Season Package" Keystone may be somewhat more realistic with the name...

Why is that ??? Any RV with 2" thick sidewalls, single pane windows, minimal insulation in the floor/ceiling, a 50 to 60 percent efficient furnace and a "2 inch heat duct to keep the belly tanks warm" is, at best, hopeful thinking for early spring/late fall camping in many places, but "ain't no winter package" going to keep most Keystone brand trailers warm in Montana, Idaho or Wyoming in January/February" without extensive additional preparation.....

Here's a photo of that "infamous 2 inch heat duct" intended to keep the belly from freezing. Its inability to do what they promise is what led directly to the addition of tank heat pads on the belly tanks in later models.
 

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Here's something that nobody mentioned. If your camper has one of those stickers that says arctic package or something similar and your dump valves and piping are outside the underbelly, thats a freeze break waiting to happen. The dump valves must be up inside the heated underbelly.
 

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