Car batteries and Water

[AndyF]

You just run a second pipe in open at both ends, the air pulled out of one pipe will be displaced by air coming in on the other pipe.

 

[Stupot]

Had a chat with a work colleague today who is right techie, he to seems to think that with a motorcycle battery and a couple
of PC fans we could get around 28 hours usage, he had a few of the batteries there as he uses them in intruder alarm bell boxes
and they seem much more suited.

Only down side is that they around £40 a piece  :doubt:

Certainly going to try the convection chimney first.

Thanks for the advice and comments so far, much appreciated.

Stu.

 

[SamT]

Good luck - let us know how it goes.