What you have to do is back the car up to your front door, seal up around all but the exhaust pipe, and leave the engine running. After a while you'll no longer care whether the house is damp or not :lol: :lol: :lol: :lol: :lol:
Seriously, its a house ventilation system and if you read back through this thread you'll find out heaps about it
Cheers
Jude