Returned home after another great 7 month trip to NT and FNQ, the Carafan again did an excellent job allowing plenty of dirt road travel without any concerns of dust intrusion. Just turn it on and go, finish the days travel with a relaxing beer while others are cleaning out there vans and airing out doonas etc. Changed air filter after 2 years use travelling on many dirt roads. Highly recommend the Carafan, it keeps caravanning fun even in the dirt.