This may sound a stupid question as its the first caravan I've owed with the alde system. I've a 2021 Bailey Alicanto Grande Faro which i upgraded from a 2009 swift conquerer with the blown air and separate water heating system. I like to keep the heating on low during the cold winter period but is it safe when drained down or can this damage the hot water heater as obviously no water in the tank? Hope this makes sense and thanks in advance