In the European Union the most inefficient devices are simply banned. (In some cases, I don't keep up-to-date with consumer appliances.)

For tumble driers, scroll to the annex of https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A...

"From 1 November 2015:

— for condenser household tumble driers the energy efficiency index (EEI) shall be less than 76,

— for condenser household tumble driers, the weighted condensation efficiency shall be not lower than 70 %."

(And then a definition of what that means.)