"Martin Sykes" wrote in message
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"Alan Holmes" wrote in message
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"Jodie" wrote in message
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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!


But the clock won't be switched on and off by the thermostat if it's built
in to the heater.

It's not impossible to connect to the thermostat.

--
alan

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