"Peter Parry" wrote in message
...
On Mon, 6 Mar 2006 14:29:58 -0000, "Doctor Drivel"
wrote:


How Mr Parry can say that solar DHW heater don't pay for themselves over
20
years is mystifying.

I have no doubt you find it so. It involves measurement and
recording of information - techniques you do not appear to have any
familiarity with.

You are the "only" one who comes out with such allegations. Everyone else
seem to make them work properly and make back the cost in fraction of that
time.