The original idea for the side pipes on the limousine was fan-forced chimneys... then I remembered the smokeless heat source! So now they are used to return spent, low pressure steam from the engine back to the boiler, the external pipes helping to cool and condense some of it back into water for improved efficiency and distance per tank of water. Or something...! The chimney on the factory could be a similar device, like a primitive version of a cooling tower on a nuclear power station.
Re the meteor/meteorite argument, actually it should be called a meteoroid. Meteorite is the substance a meteoroid is made out of (no matter what the actual elements and compounds are), and a Meteor is the bright phenomenon caused when a meteoroid burns on passing through the atmosphere. Not that this matters, just being pedantic!