[paul ette]

so last winter i had a little ro that i kept in the house, but i now have a bigger ro that has 2 20 inch membranes that is in my van, last winter i just used to put a heater on in the morning to unthaw things before i went work, now im worried because i have the membranes in van and cant do it.
so do the jackets you buy to put over them keep them from freezing?? or do you need to also put a heater on in there through the night?
really dont like the idea of having a heater on in the van through night in case it catches fire

[Spruce]

Unfortunately, if you feel this way about a heater in the van, thenyou can't leave the r/o in the van, period.

We use an electric heater with a frost thermostat and haven't ever had a frozen van - neither have I ever had the r/o in the van either.

I built a seperate box for my r/o last winter with a tube heater inside - its in my garage, but it could also be in an outside shed, provided it had water and electricity.

See http://www.cleanitup.co.uk/smf/index.php?topic=177074.0

[paul ette]

ok so if i was too put a heater in van, what should i do put it on a timer? and how long on/off

[Nathanael Jones]

I use two aquarium heaters, 500W ones cheap off ebay. Turn the thermostat down to minimum (16c I think) and leave em on all night - 16C isn't much but it keeps the whole van frost free and makes the hoses a bit easier to handle the next morning.

[ian1965]

Keep heater on during the night - I used a oil filled heater from B and Q everything fine during last winter - Only lost 1 day due to snow. Keep your electric bills and show them to your accountant to show the increase in usage pretty sure you can claim part of it back.