[mgba_78]

We have a 4ft green house heater. IP65 rated I think, low wattage so cheap to run 20-30p a night!
Better than and safer than fan heater. Keeps van perfect,  didn't even gave to scrape any ice off windscreen as all toasty! £20 we'll spent.

Have you got a link to it? I've a greenhouse heater but i'm always worried about condensation drips...

http://www.ebay.co.uk/itm/380516555123

Heats up nice and quick and just checked on van and its all nice and warm inside. Doent over heat the van just right inside.

[PurefectWindowCleaning]

What do you then, leave a window slightly open to allow access for the cable?

[mgba_78]

What do you then, leave a window slightly open to allow access for the cable?

Nah rear doors on vivaro have rubber seal in middle at back so Doors shut van locked, easy 

[Steve Sed]

Thanks for all the above advice. The two key bits I reckon were keeping water flowing and draining hose between jobs. I worked from 8-4 and earned as much as Richywilts team of two did the other day with 1/2 hour for lunch. 

I was a bit slower than usual and used a bit more water, but feeling dead pleased with myself.

[DeLuce]

Good on yer Steve, well done m8

[Dora Jarr]

Sorry, but there is no God.  Haven't you learnt that yet?