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The manufacture of vacuum cleaners produces the second largest amount of greenhouse gases among electric appliances. A british study revealed that more than half of them are still in good condition when they're disposed of.
Build a Tenok to turn that “waste“ into a resource: With the help of adjustable adaptors it can be equipped with almost any used vacuum cleaner motor and hose. A detailed online construction manual ( https://www.instructables.com/id/Tenok-the-Adaptive-Vacuum-Cleaner/ ) and free files for 3D-printing enable even amateurs to make it in small workshops.
Tenok can be built locally when needed – no need for mass-over-production