if people who have fitted these systems to vans and not informed insurer then your insurance will be void. It will be classed as a modification like any other. Everything you do toa vehicle from changing wheels and styling , engine etc insurers must be informed at all times
100% correct. This also applies to diesel heaters & even pro fitted Ionic systems. It also applies to cold systems where the tank is bolted in as this is still classed as a permanent modification.
GET IT IN WRITING from the insurer that it is covered,.. brokers will tell you anything to sell a policy, but its when you have to claim you discover they were talking rubbish.