The New York Times wrote:
BD Hotels installed key card switches in three of its boutique hotels in New York several years ago, including the Ludlow on the Lower East Side.
ROME — At the Palazzo Navona, a boutique hotel named for the famous piazza here, guests must place a room key into a slot on the wall to activate the lights and temperature control system in their rooms.
The Palazzo’s use of the key card device is not unusual in Europe or in other parts of the world, like Asia. Even in countries like Norway where electricity is relatively inexpensive, many hotels use them to reduce energy costs.
American hotels have long resisted key cards or other energy-saving systems. Energy was cheap, and hoteliers feared that guests, who routinely left their rooms with the lights and air-conditioner on, would see any check on their energy use as an inconvenience.
Hotel guests “have a feeling that they paid for the space and they can use it freely, and there’s a natural tendency not to be too conscious of their energy use,” said Brian Carberry, a director of product management for Leviton Manufacturing Company, of Melville, N.Y., which makes key card switches and other energy-saving devices for hotels.
But the aversion of hoteliers in the United States is slowly shifting as Americans have become more energy conscious and more states and municipalities have adopted rigorous building codes for energy use.
In 2014, the latest year for which figures are available, 29 percent of hotels surveyed by the American Hotel and Lodging Association had a sensor system in guest rooms to control the temperature, compared with less than 20 percent in 2004; and more than 75 percent had switched to LED lighting,
In 2014, the latest year for which figures are available, 29 percent of hotels surveyed by the American Hotel and Lodging Association had a sensor system in guest rooms to control the temperature, compared with less than 20 percent in 2004; and more than 75 percent had switched to LED lighting, up from less than 20 percent. Other energy-saving measures had also been more widely adopted.
According to the World Tourism Organization, an arm of the United Nations, tourism has a significant impact on climate change, accounting for about 5 percent of the carbon dioxide released globally into the atmosphere. That is 3 percent from airline travel, but the remaining 2 percent from accommodations and local travel, said Zoritsa Urosevic, the organization’s representative to the United Nations at Geneva, in charge of its liaison office.
Energy costs typically represent 4 to 6 percent of a hotel’s overall operating expenses, with the largest share for heating and air-conditioning.