SN (Subnormal) from +10°C to +32°C
N (Normal) from + 16° C to + 32° C
ST (Subtropical) from + 18° C to + 38° C
T (Tropical) from + 18° C to + 43° C
I've read that Dometic gets a lot of complaints on SN rated units. Would someone look at your 5.0 plate at the Climate Rating and let us know what it says. Apparently the 5.0 units aren't as much of a problem. THX!
I found some published info that states the 5.0 is Climate Class N.
A good link to read about this topic..
Tropical Rates Fridge - Caravan and Motorhome Books