. Hoteliers can use technology in a number of ways, from taking guest reservations to saving energy and water in hotel guest rooms. Energy and water saving require environmental technologies. Examples of environmental technologies related to the hotel sector are a key-card system for energy saving, a centralized air conditioning system that can reset a guest-room's temperature to the hotel's established temperature when integrated with a building management system to save energy, and light-emitting diode (LED) lights and heat pumps. In addition, many advanced environmental technologies have entered the market such as solar heat pumps, solar control film, solar batteries, light pipes, energy efficient lighting, light sensors and dimmers (Chan, [17]), different types of food decomposers, and water-saving devices.