RUBS means Ratio Utility Bills System. With RUBS, a price based on actual use is not sent to the tenant as with submetering, and the amount of water saved by these systems is unclear, but usually there is some percentage of savings. A hot
water hybrid (HWH) billing system is a combination of submetering and allocation where hot water is submetered and a formula is applied to estimate the resident's total water use based on the volume of hot water metered. HWH systems provide more of a price signal than RUBS but less than that for
sub-metering. Many multi-family properties around the country are implementing RUBS programs with great success. This eliminates the need for costly sub-metering installation and makes the billing process simpler. Normally, the total property water bill is used for the calculation. The total bill is reduced by 10% - 25%, for common area usage, and the remainder is divided among the residents.
Larger units may pay more than smaller units or units with more occupants may pay a larger percentage in an effort to be as fair as possible. A RUBS system is sometimes implemented until a metering system can be installed, thus helping the owner with water cost expense in the interim.
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Based on information from AABS, a utility billing company, a ratio utility billing system (RUBS) uses an allocation formula that divides a property's water bill among its residents based on a ratio of floor space,
number of occupants, or some other quantitative measure. For more information about a RUBS program,
contact AABS at 800-678-5508.
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Aug 26, 2010