"Jodie" wrote in message
...
Have a nice new electrical greenhouse heater. Its set to automatically
start and stop with temperature.
So as to calculate power use and hence cost of greenhouse heating anyone
know of a good inexpensive system of recording the duration the heater was
actually on?

Connect a cheap electric clock in paralell with the heater, then all
you have to do is read the time!

--
alan

reply to alan(dot)holmes27(at)virgin(dot)net

Thanks