I know the alde is the bees knees and if we go for the astella that's what's fitted as standard, but I can't quite work out what a Truma 3004 is. This is what's fitted to the Adora range but is it just a 'fire' that relies on radiant heat from a central point? or is there some pipework system that distributes the heat round the caravan. I think there must be ducts for the warm air to blow to various parts of the Adora, but I have seen some posts suggesting that there are convectors at certain points too.
If the Truma has noisy air blown round the caravan I think it would keep my wife awake. I'm Ok because I would be wearing my earplugs :-)