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Spend $150 now and SAVE $15 each year... ROI = 10%
Older toilets use about 3.5 to 7 gallons per flush. Low flow toilets use only 1.6 gallons per flush and save you on average 40,000 gallons of water per every 10 employees per year. Dual-flush toilets take savings to the next level, because they have two buttons - one for a light flush at 0.9 Gallons and the other for a heavy flush at 1.6 gallons. Dual-flush toilets have been very popular in Europe and Asia for years. They save an average of approximately 26% more water than single-flush 'Low-Flow' models, and you can control when you need more or less water.
You may also want to consider Waterless Urinals. With 2 visits per day, and no gallons versus one gallon, over 250 work days, twice a day flushing totals 500 flushes per employee times 5 employees (assumping half are women). This adds up to 2,500 flushes at a 2 gallon average flush, which totals 5,000 gallons for a savings of $7.50. The payback is a long way out, so this may be more of an eco-karma decision than any form of monetary savings. The dual flush toilet ROI Calculation is based on a typical toilet costing about $150 and the dual-flush models costing about $300 with an average savings of 40,000 gallons and the cost of water at about $1.50 / 1,000 gallons. 250 work days with twice a day flushing totals 500 flushes per employee, times ten employees adds up to 5,000 flushes. At a 2 gallon average flush, you will use 10,000 less gallons of water for a savings of $15.
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