I bought one for My Caddy van, it has two small fans (www.amazon.co.uk/BestFire-Adjustment-Rotatable-Ven...4) and i use it in conjunction with the ventilation. It does make a difference, eventually!. If the interior of the van is very hot, using them is just blowing hot air on yourself!, but once you are on the move, along with the ventilation, it does help. I actually have mine mounted on the bulkhead to blow down on the top of my head and down my neck but you probably couldn't do that in a car. I did originally have them on the dashboard but figured i'd be better having them where they are now. Not sure i could recommend it though, they worked fine for a while, but there seems to be issues with the connection in the 12v plug as i have to wiggle it about for ages trying different positions to get them to start working. Unless someone else has had a more positive experience, i think you'll just have to take a punt!

Plug in fans will be a waste of time - been there done that. If the aircon is working but just weak then I'd really suggest getting it regassed by a specialist who could also put a dye in it so a leak could be spotted if there is one. Almost all aircon systems eventually need regassing. I don't know what car you have but later implementations have solenoid diverter valves that can become sticky/seized. Usually easy to replace whilst the system is being re-gassed.

Edited by Big John on 30/07/2020 at 22:16