Anyone run their heater when caravan not in use?

Sam Vimes

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Sep 7, 2020
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I thought that as we're not using the van in the winter months and it's parked up at home I'd run the heater for a few hours every month or so during the damp winter season. Might just keep damp and mould at bay.
 
Nov 6, 2005
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My brother-in-law keeps the heating on while his caravan is parked at home, on a low thermostat setting - but I don't!

Any leaks need dealing with obviously and the caravan takes longer to warm up on the first trip of the year - never had an issue with mould.
 
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Nov 11, 2009
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Never heated the caravan over winter as it was in store or being used. Just ensured good ventilation and opened everything up, and put furnishings on their sides. Prior to winter all surfaces had a wash down but never used spray polish or the like. Was never affected by mould. But western Scotland could be different given its propensity for wet stuff.
 
Mar 14, 2005
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As you may remember condensation usually occurs when warm air takes up moisture then as it cools it cant hold as much moisture so it deposits it as rain or as condensation on cooler surfaces the air touches. Exactly the same applies to the wooden structure of the caravan, as you warm wood it can absorb more moisture than which it has to try and get rid of when it cools down again. That moisture in the wooden and other absorbent materials is held on the surface which is one of the causes for mould to grow.

Basically adding heat can cause the caravan to absorb even more moisture which means when you turn the heater off it provides even more surface moisture which mould loves.

Incidentally the same thing can happen if a caravan is stored where sunshine can heat parts, whilst other parts in the shadows are still cool and that is another mechanism that can promote mould growth.

Ventilation is the simplest and cheapest method of helping to prevent condensation, and mould. A good wie round with an anti mould solution is also helpful to remove as many dormant spoor's as possible.
 

JTQ

May 7, 2005
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Yes we did back when we caravanned all through the year, saved having to drain down completely to avoid frost damage.

Most times I used a thermostat switched electric fan heater as the Alde's minimum of 5 degrees is a bit higher than needed, but have used that on those occasions when it was the more expedient method.
When van properly drained there is little point, other than I tend to like to periodically use systems like this, rather than leave unused for months.
The higher cost of energy today might make a difference, if we were continuing with our all season caravanning. But in reality a stat set to just above freezing would see little running time here in the southern area.
 

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