Off - board TSE solutions do not typically require any vehicle modifications , as they provide heating and air conditioning services via an overhead unit and hose that connects to the truck 's window .
Typically , on - board TSE solutions require some vehicle modification .
TSE     TSE solutions do not typically require any vehicle modifications , as TSE provide heating and air conditioning services via an overhead unit and hose that connects to the truck 's window .
Typically , on - board TSE solutions require some vehicle modification .