I've been taking mine through one (3 times now, today included), its a high pressure hand wash, no brushes or moving parts. So far no leaks or problems, it has plenty of clearance, and believe me I checked first! However, I do not have a furnace/fridge so no vents or anything to be concerned with. No water enters through my propane door either. So far so good. Guess I'll continue to do so unless the experts really suggest not doing it under my circumstances.