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AmerCable Incorporated


energy - conservation - hotels

(intro) (initiative) (lighting)  (HVAC) (boilers) (controls) (laundry) (windows) (water) 

Water Efficiency

 
Reducing water demand in hotels through efficient technologies lowers both energy and water consumption. Guest showers, pools, and especially laundry operations account for a large part of a hotel's energy bill.

Many existing technologies relieve excessive water demand in a hotel, allowing for significant water savings and reducing operating costs.

One example of the enormous water-saving potential of efficient water technologies can be found in a March 2000 USAID study on the opportunity for water efficiency improvements in the Barbados hotel industry. The study found that hotels that aggressively use water-saving technologies, such as low-flow toilets, faucet aerators, and drip irrigation, consume one-fifth of the water per guest as similar hotels with less aggressive water-efficiency actions. Importantly, guests at the more water-efficient hotels noticed no reduction in customer service. In addition, the study estimated that the least efficient hotel surveyed could achieve more than US$250,000 in savings per year in water bills alone if it implemented the same technologies as the most efficient hotel.

Water-saving technologies for hotels include:

Ultra Low-Flow Toilets
In the past, typical toilets have used between 19 and 26 liters (5-7 gal) per flush. Ultra low-flow toilets can do the same job using as little as 3 liters (0.8 gal) per flush. It is important to compare models, given the wide discrepancy in performance among ultra low-flow models currently in the marketplace.

Toilet Dams or Other Water Displacement Devices
Toilet dams are devices that block part of the tank so that less water is required to fill the toilet following each flush. Other water displacement devices simply reduce the amount of space in a toilet's holding tank so that each flush uses less water. A plastic bottle filled with water does a good job in limiting the tank's capacity. Some problems may occur with the need to double flush, but water savings from these devices are estimated at about 10 percent.

Low-Flow Showerheads
Typical showerheads use about 17 to 30 liters (4.5-8 gal) per minute. Low-flow shower heads use less than 9.5 liters (2.5 gal) per minute, with no marked reduction in quality or service. These devices both save water and reduce water heating bills.

Efficient Faucet Aerators
These devices can easily be installed on the ends of most faucet systems to replace existing aerators. Even though these devices allow less water to flow through the faucet, most consumers will not notice a difference. These devices can save between 12 and 65 liters (3.2-17.2 gal) per day.

Fix Leaks at All Faucets
According to New Jersey Natural Gas, a leaky faucet that fills a coffee cup in 10 minutes will waste 3,280 gallons of water a year. And if the water that's leaking is hot water, then a significant amount of energy is being wasted as well.

Landscape Water
The following techniques are the most effective ways to control outdoor water use:
 

  • Xeriscaping plants (keeping only native, drought-tolerant plants that can thrive with minimal water on a property);

  • Moisture sensors in soils;

  • Controllers on irrigation systems.


Also, submeter landscaping water if waste water/sewage changes are based on incoming meter. Meter “evaporative losses” for landscaping and subtract from main meter (if allowed).


References
Watergy - Demand-side Management and Technologies.


Alliance to Save Energy. Watergy Manual. Demand-Side Improvement Opportunities. 2002.

Niagara Conservation.
www.niagaraconservation.com

American Water Works Association's Water Wiser: The Water Efficiency Clearinghouse.
www.awwa.org/waterwiser/

 

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