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Whakatane teacher saves school $206,000 in power bills

Dave Dobbin - the technology teacher, mind you, not the musician - has earned a reputation among his students as a bit of an inventor.

Seven years ago he walked into his classroom and switched off all the lights, which were mostly on - as was the heater.

It was on for 24 hours a day, by accident.

Dave took a look at his school's power bill and found it was rather large - 450,000 kilowatt hours and $120,000 per annum.

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