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A National Study of Water & Energy Consumption in Multifamily Housing


In-Apartment Washers vs. Common Area Laundry Rooms

By: National Research Center - Monday, December 17, 2007
Source: National Research Center

National Research Center, Inc. was contracted to conduct a national study comparing laundry-water use rates of apartment residents whose buildings have common area laundry rooms with use rates of apartment residents whose building have laundry facilities in each unit.

From September to December 2000, laundry-water use was calculated in part using water meters attached to 191 in-unit washing machines and 50 common area washing machines in 8 apartment buildings matched for quality and size in 4 cities across the U.S. Results were adjusted to reflect residents’ self-reports of off-site use during the study period. After adjusting for self-reported off-site laundry use and averaging figures for all four national sites, the study revealed that residents of apartments with in-unit laundry facilities used 3.3 times more water for laundry than residents in apartments utilizing common area laundry facilities. Further analysis revealed that residents with in-unit laundry facilities used 5 times more energy than residents in apartments utilizing common area laundry facilities.

 Read the full study here.


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