A true all year, all seasons full time fifth wheel main factor is it has to withstand temps below 0 and above 100 with no issue. Extreme inter rigid construction. Continuous full time living in extreme temps, stand alone house on wheels. These are the very few, most expensive, heaviest, luxurious "try to play with me" monsters that no other trailer nor fifth comes near. By actual specs: 40k+ furnaces, 30+ r values and extensive under carriage blown heating (not only just mere heating pads). The largest fifth wheels sheer size and space accommodate what is needed to hold high level specs needed. They are not trailers nor toy haulers. You get what you pay for. You think not, challenge? Currently, alot of makers make claims here and there but for the most part, in the end they will not stand up by itself to extensive periods of time through all extreme seasons. Go to RV Trader, RVT, etc. and put in the highest priced fivers (non toy hauler). Download from each maker's site the pdf spec sheet. You will be shocked. Why are they so pricey, some more expensive than some homes? Construction, durable long lasting - come rain or shine. Old man Canadian winter or Arizona heatwave summer. And, oh yes, let's not play here: You will be paying for the propane to run the beast, but... no skirting needed. The chosen few are The Stand Alones. These are the fifth wheels - Forest River - Cardinal, RiverStone. Thor - Landmark. DRV - Mobile Suites, Elite Suites. Crossroads - Redwood. Independent lines - Forks RV - Continental Coach (custom made). New Horizons (custom made (post added and confirmed - you are correct Colliehauler). Recent Past Orphaned Lines - Evergreen - Lifestyle Luxury, Bay Hill. Carriage - Carri Lite, Royals. DRV - Tradition, Estates. Newmar - Kountry Aire. Teton - Royal, Experience. Note: Popular notions - Good brands like Cedar Creek, Montana lines are not true 4 seasons fivers. New recent high specs are specialized order, not standard. Nuwa and orphaned Excel lines lack in overall extreme r values. Carriage Cameo line falls into the upper mid fiver level, like Montana or Cedar Creek. Always trusted and respected Arctic Fox's quality line is considered upper mid. Models listed above as best now far exceed AF's specs. Regards, Mark
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