Switch to low flow or dual flush toilets/urinals or install toilet-tank fill diverters. Also, stay on top of leakage from the toilet flappers (the #1 source of leaks - a leaking or poorly fitting flapper can waste up to 200 gallons of water a day and may cost hundreds of dollars a year). Flappers typically start leaking within 1-2 years so schedule regular checks for leaks. Add a sign to your public bathrooms letting people know how to report leaks.
7. To reduce operational costs, water and energy consider installing an ozone laundry system.
8. Switch to Mercury-Free Flourescent/CFLs (called ESL (electron stimulated luminescence) lamps) or, where appropriate, LED light bulbs in guestrooms, lobbies, and hallways. With flourescent tube lamps, replacing outdated T12 models (with magnetic ballasts) with newer T5 or T8 models (with electronic ballasts) reduces energy use and improves light quality.
9. Use occupancy sensors and/or timers for areas of your hotel that are less frequently used such as hallways, outdoor areas, or public bathrooms. In some cases (i.e., staff storage areas) more energy is saved by training staff to turn off lights when a room is unoccupied.
10. If available, schedule an energy audit through your local energy provider or a local energy auditor (aka energy consultant).
11. Consult outside sources to evaluate the total system when replacing