On Mar 28, 11:04 am, Paul Waites wrote:
Hi all,

Last year there was a BBC2 programme called "Its not easy being green".

In one of the episodes the presenter Dick Strawbridge built a greenhouse
heater out of a computer cpu fan, solar panels and a bit of piping....

Now that I've erected a nice shiny a wanted to try out his idea (It
involved circulating the air from the top of the house back into the
gravel bed on the floor.

I can't find any link on the internet or the BBC's website..... Has
anyone tried this idea or knows where there are plans for such a scheme.

Thanks,

Paul.

The show appears to be back on.

I would suspect, solar panels power the fan which blows air down a
tube/pipe into the gravel. whether it really works or not I
wouldn't like to say.