First off, the TDG (Transport of Dangerous Goods) Regulations have a bunch of exemptions.
First and foremost to the RV crowd is 1.27 of the TDG;
"(1) These Regulations do not apply to dangerous goods on a means of transport that are required for;
.........
(d) ventilation, refrigeration or heating units that are necessary to maintain environmental conditions within a means of containment in transport on the means of transport and are intended to remain with the units or on the means of transport until used."
So there you go, the sky is NOT falling. Go on about your business...........
