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For many of us who work in multi-story office buildings, we have the option of either taking an elevator or taking the stairs. I was astounded to learn how much energy an elevator consumes. Although many factors need to be considered such as elevator age, elevator drive train, number of passengers, and height of the building, it always turned out that an elevator uses a lot of energy. How much energy is needed to operate an elevator you ask? Let’s assume we are in a 5 story office building. Surprisingly, even as building height increases, elevator energy consumption does not increase proportionally. For example, an elevator in a 30 story office building only uses about 14 kilowatt-hours more (26 percent more energy), even though the building is 6 times higher. If the elevator in a 5 story building is in operation for 8 hours per day and has a 2,500 pound capacity, approximately 53 kilowatt hours of energy are used per day. How much energy is this exactly? A 60 watt light bulb consumes 60 watts of energy per hour. This means the 53 kilowatt hours of energy used by the elevator is equivalent to leaving the 60 watt light bulb on for over 880 hours! Even if the elevator we’re using is 50% more efficient, that is still over 440 hours of light bulb operation. I’ve been on an exercise regiment lately, so I figure why not take the stairs to augment my program. It’s really not much more work to take the stairs, and I don’t even have to take time out of my day unlike when I formally exercise. I work in a two story office building, and I take the stairs every day. It’s a great way to keep my blood flowing, not to mention it’s much faster than the elevator. While walking up and down 10 or 15 flights of stairs at work is probably unreasonable, 2 – 3 flights of stairs shouldn’t be. Walking instead of taking the elevator is a good way to get exercise, something we all need. Taking the stairs is healthy for both your heart and the environment – you may also shave off some travel time (and pounds) if the elevators in your building are slow. I can’t think of a better win-win.