Windows that block heat/cold (i.e. triple-glazed windows)
LED lighting throughout the premises
Electric car charging station(s) available
Toilets flush up to 6 litres per flush
Waste is separated into at least 3 categories
Automatic system or key card that turns off the light and electrical appliances when guests leave their room
Air-conditioning and heating automatically switches off when windows are open
Most of the ingredients used to prepare meals are locally produced