Hurrican and Aqua Hot, both held instruction classes for the manfacturers, with recommended parts, layouts, and specific information so the design & installation was approved by the manfacturer. Now with that said, it's known Alpine Coach did not in all cases follow those recommendations or suggestions. I cannot speak for CC, but since they and WRV are gone, it's likely it is poor vehicle quality along side of an economy which is in the tank, and most likely to stay there with high fuel costs, and the ripple effect therein. See if Hurrican knows what that is, since they assisted CC with the design and final installation.
Monty & Janet - 2007 Alpine APEX 40 MDTS
S/N - 75715 - Retired - Master Certified RV Tech