Remember the Wattson we bought last April to measure our energy consumption? It just paid for itself six times over.
Ralf was getting tense. He'd checked and double-checked every single appliance in our home and couldn't figure out why we were consuming about 30% more energy than we should have been, according to Wattson. Which adds up to about 600 euro a year.
But why? Was there a problem with the meter? Vanishingly unlikely and expensive to verify. Was it our expensive new heating system that has not been without difficulties? Everyone had assured us this was not possible.
Finally, Ralf took Wattson down to the fuse box in the basement and turned everything off, one by one, as the Wattson readings dropped modestly. The very last fuse was the magic fuse that explained the delta between what we should have been using and what we were actually using.
It was labeled: Dachrinnenheizung.
You will never believe what that is. It is an electric heater installed in the rain gutters on the roof to keep them from freezing. It's on all winter. It's like having a space heater on all the time.
We turned it off.