IAPMO Symposium - How to Calculate ROI's

2010 IAPMO / WPC Emerging Technology Symposium - May 11-12, 2010

Troy Aichele

Aichele and Associates, LLC May 12, 2010

How to Calculate ROI’s for Water

Conservation Fixtures,

Equipment and Systems

Objectives

Learn the importance of ROI’s for building

owners

Learn what is necessary to accurately calculate

ROI’s for water efficiency upgrade projects

Learn how to effectively calculate water

efficiency upgrades ROI’s

Importance of ROI’s

1. 5 Year Paybacks represent a 20% return

2. Nothing will move forward without making

financial sense

3. Easier to Sell

4. Connects environmental responsibility with

smart business

5. Easier to gain upper management approval

ROI Calculation Requirements

1. Water, Waste, Natural Gas and Electrical Utility

2. Fixture / Equipment Counts

3. Fixture / Equipment Use Rates

4. Facility Work Days and Occupancy

5. Know Facility Hot Water Creation Method

6. Efficiency Upgrade Installation Cost

7. Estimated Annual Utility Rate Increase

8. Rebate Potential

Utility Costs

Obtain Utility Rates (1 Year Minimum)

– Water and Waste (CCF)

– Electric (kWh)

– Natural Gas

(therm)

Fixture / Equipment Counts

Walk Campus

– Obtain facility drawings

– Reserve enough time

(Depends on size of building)

Use Rates

Water Closet:

– 3 / Day (Women)

– 1 / Day (Men)*

Urinal:

– 2 / Day (Men)

Faucets:

– 1 Minute / Person / Day

Shower Use:

– 8 Minutes / Day

*3 / Day if no urinals

Use Rates

Measuring with Bucket and

Stopwatch

Measure twice

and average

Measure 10% of

similar devices

throughout facility

Plumbing Fixtures

Tank-Type Water Closets

Flushometer Water Closets

Dual-Flush Flushometer

Retrofit Kits

Urinals

Faucets

Showerheads

Kitchen Spray Nozzles

Plumbing

Equipment

Major Equipment

Record Manufacturer,

Model Number, Serial

Number, Flow Rates

and Electrical

Information

(especially booster

heater) and use rates

Ice-Makers, Air-Conditioning and

Refrigeration Equipment

Laundry Machines

Medical Vacuum Pumps

Plumbing

Systems

Boiler Stack Economizer

Water Recovery

Cost: $1,090

Water / Sewer Savings: 720 GPD

Return on Investment: 5 Months

Installation Cost

Rebate

Potential

Utility Rate Trends

2002 2003 2004 2005 2006 2007 2008 2009

PeakWater$/CCFSewer$/CCF

10% 10 %

Utility Rate Trends…

The Cost of Water and

Sewer / 100 Gallons Olympia, WA: $1.00

San Diego, CA: $1.38

Boston, MA: $1.05

El Paso, TX: $0.60

Omaha, NE: $0.53

Geneva, Switzerland: $1.95

Glasgow, UK: $2.86

Las Vegas, NV: $0.80 Source: “The World’s Water 2008-2009” by Peter H. Gleick

Utility Rate Trend Impacts

Activity

Rainwater Harvesting Assumptions:

– $1 / Gallon Installed

– System Size: 10,000 Gallons

– 50” Rain / Year

– 2,500 SF Roof

– 0.62 Gallons / SF of Roof / Inch of Rain per Year

– 85% Collection Efficiency

– Water Cost: $0.0025 / Gallon

– Sewer Cost: $0.0075 / Gallon

What is the ROI?

Objectives

Learn the importance of ROI’s for building

owners

Learn what is necessary to accurately calculate

ROI’s for water efficiency upgrade projects

Learn how to effectively calculate water

efficiency upgrades ROI’s

IAPMO Symposium - How to Calculate ROI's

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