ISO 14001 is a set of environmentally friendly and cost-efficient practices that include installing energy-saving light bulbs and using biodegradable cleaning materials, water restrictors, and sewage treatment facilities to prevent water pollution. Certification is only awarded to organizations which are able to show ISO 14001 compliance throughout all operations.

All properties follow an Environmental Management System (EMS) Manual, which helps to identify and address the immediate and long-term impact of the hotel's operations on its local environment. Every six months, the Lloyd's Register of Quality Assurance sends a representative to inspect ISO 14001-certified hotels to ensure not only that the system is being maintained, but that continual environmental improvement is achieved by setting new environmental objectives and targets.