what exactly is a RV that is "4 seasons ready"?

There is no standard that applies to "4 season ready". It means that the manufacturer put a sticker on their RV. You need to ask the dealer or manufacturer what they meant by that designation.

There is no standard that applies to "4 season ready". It means that the manufacturer put a sticker on their RV. You need to ask the dealer or manufacturer what they meant by that designation.

A pipe dream mostly.

Have a look at Roughneck trailers: Roughneck trailers

2 x 40,000btu furnaces. That'd give the propane boo hoo's something to squawk about.

donn0128 wrote:
Heck, many houses with 2X4 stud walls are not real four season in some climates.

I'll second that! :E

I think of it as the ability to camp while below 10F and still be able to use the water and sewage tanks without a problem.

Extra insulation is a given. Hopefully the manufacture included heated area around the tanks, and given some thought to how to live in the RV while it is 10F outside. Sufficient furnace size that it will not need to run 40 minutes or more each hour, and such.

Those in the south, they might agree that dual air conditioners and perhaps some fantastic fans should be included in the 4 season package.

50 amp electric service should also be included, so that electric heaters, electric fireplace has some place to power up, without worry about the main circuit breaker tripping on a cold night, or when 2 A/C are running and you want to cook something like coffee and run the 10 amp microwave at the same time. . .


Fred.

MY 5vr MFG. states '4 Season' as:
"Four season" is a term that can be given many definitions.

Their definition
Higher insulation performance
Enclosed & heated underbelly
Attic venting
Capable of performing in temperatures of 20 degrees or lower and 90 degrees or higher.

Having been in -19*F temps and 110*F temps I can say YES it is "4 Season" capable

No such a think except to marketing people. Heck, many houses with 2X4 stud walls are not real four season in some climates.