Whilst I realise that heat and ventilation are the key to a dry winter Motorhome I've just bought on these from Aldi. £34.99 with three year warranty. It's compact and should remove 400ml per day, with a 1.5 litre tank and auto switch off. It's actually 12v with a mains transformer and it's quite small. See Aldi site for details. Regards Brian in sunny Macclesfield.