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Sustainable Solutions Caroma
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Water and Cost Savings for SSI High Efficiency Fixtures
 
Please fill in the shaded boxes with your local information. The results of your water and energy savings by using SSI products are automatically calculated in the white boxes below.
 
US House Worksheet          
Site Name Your House        
Date completed September 05, 2008
Building information          
Total residents        
Utility information          
Water and sewer cost, per 1000 gallons /1000 gal (nominal value)      
Hot water energy cost /million BTU's (ten therms or 0.95GJ)      
If using electricity for hot water, enter cost per kWh x200 (e.g for $0.10/kWh, enter $20)
If using propane for hot water, enter cost per gallon x 10.25 (e.g. for $2/gal, enter $20.5)
Hot water cost per 1000 gal at 140F
$11.91
 /1000 gallons      
 
Fixture information Toilets Bathroom
Faucets		 Shower
Heads		 Kitchen
Faucet
Aerator
Number of fixtures:
Uses/person/day: 5 2 8 1
Existing fixture type (nominal): 3.5 gpf 2 gpm 2.5 gpm 2.2 gpm
Actual fixture water use (L/use): 2.0 2.5 2.2
SSI High Efficiency Fixtures: 0.8/1.6 gpf 0.9 gpm 1.5 gpm 1.2 gpm
SSI fixture water use: 1.0 0.9 1.5 1.2
 
Dual flush toilets average 1 gal/flush (three out of four flushes are 0.8gal)
Bathroom faucet water use is based on two minutes per person, per day and one third being hot water
Shower water use is based on one eight minute shower and ¾ being hot water
Kitchen faucet water use is one minute, per person, per day, and one third being hot water
Water usage numbers are based on industry standards and US EPA statistics for water use
 
Water and Cost Calculations
Standard Fixtures Toilets Bathroom
Faucets		 Shower
Heads		 Kitchen
Faucet
Aerator 		Total  
Household daily water use           gal/day
Household annual water use           kgal/yr
SSI High Efficiency Fixtures
Household daily water use                gal/day
Household annual water use                kgal/yr
 
Reductions
daily water use reduction                gal/day
daily hot water use reduction                gal/day
annual water use reduction                gal/yr
annual water cost reduction $ $ $ $ $ $/yr
annual hot water cost reduction $ $ $ $ $ $/yr
Total annual cost savings $ $ $ $ $ $/yr