Well the plastic bottle idea is down to a previous beeb board poster. Half of this yrs bottles are unpainted- oops, but better than none. No idea where I got the pot/tealight one though.J.
On looking for solar heating for greenhouses, I came across a suggestion for painting a lot of cans black and sticking them together as a heat harvester
Posts
Well the plastic bottle idea is down to a previous beeb board poster. Half of this yrs bottles are unpainted- oops, but better than none. No idea where I got the pot/tealight one though.J.
On looking for solar heating for greenhouses, I came across a suggestion for painting a lot of cans black and sticking them together as a heat harvester