SAINT PAUL SUSTAINABLE BUILDING POLICY Saint Paul Sustainable Building Policy Training Module Four Indoor and Outdoor Water Use

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SAINT PAUL SUSTAINABLE BUILDING POLICY Water Use Requirements Background Indoor Requirements Overview Outdoor Requirements Overview How to meet the requirements for each guideline or rating system Additional Resources

SAINT PAUL SUSTAINABLE BUILDING POLICY BACKGROUND

SAINT PAUL SUSTAINABLE BUILDING POLICY Background: Water use in the US Water use for public supply (potable water) have been increasing steadily since 1950, with increasing amounts of water consumed per person. The average person in the US uses almost 70 gallons of water per day, without accounting for irrigation.

SAINT PAUL SUSTAINABLE BUILDING POLICY Background: Water use in the US Reducing water use has the added benefit of reducing energy consumption, allowing additional savings. Reducing water use reduces sewer cost and the load on municipal wastewater systems. Excessive water consumption can have negative impacts on slow-recharging ground and surface waters, as well as increasing well depth to draw deeper and deeper reserves.

SAINT PAUL SUSTAINABLE BUILDING POLICY Saint Paul Overlay Water Requirements Goal: Reduce indoor and outdoor water consumption. Objective: Choose fixtures, landscaping elements, and irrigation systems that use less water. Strategy: Calculate water use of the project and compare it to a calculated baseline, both for interior and exterior use to ensure that savings are greater than 30% for interior and 50% for exterior; or choose fixtures that will have this effect.

SAINT PAUL SUSTAINABLE BUILDING POLICY INDOOR WATER USE REQUIREMENTS

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor Water Use: Saint Paul Overlay requirements Requirement: Predicted use of potable water in the building must be at least 30% below levels specified in Energy Policy Act of – Water coolers, water fountains (bubblers), and other beverage water devices are exempt from this requirement.

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: background on fixture flow rates Mandated by the Energy Policy Act of 1992: Toilets: 1.6 gpf Urinals: 1.0 gpf Bath and kitchen faucets: 2.2 gpm at 60 psi Showerheads: 2.5 gpm at 80 psi (Note that these federal maximums, and that to satisfy the Overlay requirements fixtures will need to have higher performance than those listed here)

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: 2 available methods Prescriptive path Performance path (calculated reduction) Not all guidelines or rating systems will have the prescriptive path option.

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Prescriptive path (fixtures) The Saint Paul Overlay requires that all fixtures must not exceed the following flow rates: Toilets: 1.12 gpf Urinals: 0.7 gpf Bath and kitchen faucets: 1.54 gpm at 60psi Showerheads 1.75 gpm at 80 psi

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Prescriptive path (non-fixtures) The Saint Paul Overlay requires t he following for non-fixture water consuming devices: Clothes washers: WaterFactor of less than 6.0, and/or ENERGY STAR Qualified Dishwashers: ENERGY STAR Qualified Other water consuming devices (autoclaves, cooling towers, etc): Use available technology where available, meet or exceed 30% reduction through direct efficiency or related technologies.

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Performance path If using the Performance Path, the Saint Paul Overlay requires the calculation of a “base case” and a “design case.” The “base case” must use Energy Policy Act of 1992 fixture ratings, and typical use amounts for other fixtures and devices. The “design case” must show that 30% less water will be used than the “base case.” The use patterns between the “base case” and the “design case” remain the same.

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Performance path The Indoor_water_use_calculator is an Excel workbook available at The calculator is used to demonstrate compliance with the Saint Paul Overlay requirements and a completed calculator must be submitted to document compliance with the performance path. The calculator may also provide an alternative method to meet the requirements of some guidelines or rating systems. It does not, however, replace any requirements internal to a guideline or rating system.

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Performance Path: Indoor_water_use_calculator The indoor water use calculator consists of two sections: the base case and the design case. In the base case enter the name of the occupant group, and the use pattern for each fixture.

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Performance Path: Indoor_water_use_calculator The design case uses the use pattern entered into the base case. Enter the design fixture flow rates into the yellow cells.

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Performance Path: Indoor_water_use_calculator There are 5 available sheets, intended to be used if there are distinct use patterns in the building. The Summary Sheet combines the total use, and calculates total savings.

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water reporting requirements: Prescriptive Path Provide a list of all fixtures and non-fixture water consuming devices included in the project. The template for the list is available at Provide flow, flush, and per-use water use for each fixture to demonstrate that every fixture in the project is at least 30% more efficient than the Energy Policy Act of 1992 levels. Provide the information above to PED and DSI:

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water reporting requirements: Performance Path The performance path is verified through submission of the Indoor_water_use_calculator, showing at least a 30% reduction in water use over a base case. Provide the completed calculator to DSI and PED at Include a list of water fixtures and non-fixture water consuming devices, with flow or other use rates, template available at

SAINT PAUL SUSTAINABLE BUILDING POLICY OUTDOOR WATER REQUIREMENTS

SAINT PAUL SUSTAINABLE BUILDING POLICY Outdoor water use: requirements 50% reduction from base case Exact calculations vary slightly between guideline or rating systems In order to report compliance with the Sustainable Building Policy, please provide an Outdoor_water_use_calculator.

SAINT PAUL SUSTAINABLE BUILDING POLICY Outdoor water use: Outdoor_water_use_calculator It is only necessary to enter the total annual landscape irrigation consumption (after the 1 to 2 year establishment period) and the % of this water taken from an alternative water source that is not potable or harvested groundwater (such as rainwater collection, graywater, other).

SAINT PAUL SUSTAINABLE BUILDING POLICY Outdoor water use: Most guidelines / rating systems Most guidelines or rating systems have a method that will achieve the requirements of the Saint Paul Overlay to the Sustainable Building Policy.

SAINT PAUL SUSTAINABLE BUILDING POLICY Outdoor water reporting requirements: Compliance is verified through submission of the Outdoor_water_use_calculator, showing at least a 50% reduction in water use over a base case. Provide a list, both for design case and the base case, of all vegetated areas and required data (including species factors, density factor, irrigation efficiency, microclimate factor, landscape coefficient irrigation system type and resulting estimated water consumption) – template available at Provide the completed calculator and area list to DSI and PED at

SAINT PAUL SUSTAINABLE BUILDING POLICY Requirements by program: indoor and outdoor LEED N.C Green Globes Standards – ANSI/GBI Minnesota Sustainable Building Guidelines v.2.1 Green Communities Criteria Minnesota GreenStar – New Homes Checklist LEED for Homes

SAINT PAUL SUSTAINABLE BUILDING POLICY LEED N.C LEED FOR NEW CONSTRUCTION 2009 WATER REQUIREMENTS

SAINT PAUL SUSTAINABLE BUILDING POLICY LEED NC 2009: Indoor water use requirements Indoor Water Requirements: – Achieve fixture and non-fixture requirements LEED N.C. 2009

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Fixtures Achieve at least 2 points for Water Efficiency (WE) credit 3: Water Use Reduction (corresponding to a 30% reduction in water use for interior fixtures from the Energy Policy Act of 1992 levels). LEED N.C. 2009

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Non-Fixture devices Choose non-fixture devices that use, when available, at least 30% less water than prescribed by the Energy Policy Act of Water coolers, water fountains and other beverage water devices are exempt from this requirement. If dishwashers are included in the project, use ENERGY STAR qualified models. If clothes washers are included, use washers that have a water factor less than 6.0 or that are ENERGY STAR qualified. LEED N.C. 2009

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Reporting Requirements Fill out the Saint Paul Indoor_water_use_calculator workbook, and provide a list of specified fixtures or equipment, their location in the project, and their nominal flush or flow rates. Provide the completed calculator to DSI and PED at LEED N.C. 2009

SAINT PAUL SUSTAINABLE BUILDING POLICY LEED NC 2009: Outdoor water use requirements Achieve 2 points for LEED Water Efficiency (WE) Credit 1: Water Efficient Landscaping by reducing water consumption by 50% from a calculated base case. LEED N.C. 2009

SAINT PAUL SUSTAINABLE BUILDING POLICY Outdoor water use: Reporting Requirements Fill out the Saint Paul Outdoor_water_use_calculator workbook, providing details on the assumptions behind the calculation (available from the required LEED calculations). In addition, provide a list of landscape areas as detailed in the general reporting requirements section of this module. Provide the completed calculator to PED and DSI at LEED N.C. 2009

SAINT PAUL SUSTAINABLE BUILDING POLICY Green Globes GREEN GLOBES WATER REQUIREMENTS

SAINT PAUL SUSTAINABLE BUILDING POLICY Green Globes: Indoor water use requirement Achieve fixture and non-fixture requirements For fixtures: – Achieve at least 12 points for credit : Plumbing Fixtures and Fittings Green Globes

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Non-Fixture Devices Choose non-fixture devices that use, when available, at least 30% less water than required by the Energy Policy Act of Water coolers, water fountains and other beverage water devices are exempt from this requirement. If dishwashers are included in the project, use ENERGY STAR qualified models. If clothes washers are included, use washers that have a water factor less than 6.0 or that are ENERGY STAR qualified. Green Globes

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Reporting Requirements Fill out the Saint Paul Indoor_water_use_calculator workbook, providing a list of specified fixtures or equipment, their location in the project, and their nominal flush or flow rates. Submit the completed calculator to DSI and PED at Green Globes

SAINT PAUL SUSTAINABLE BUILDING POLICY Green Globes: Outdoor water use requirement Achieve one of the following paths in section 7.4.1: Site Ecology – Any of Landscape and Irrigation paths 1,2,3,4, or 7; or – achieve 10 points for credit : Irrigation need elimination. Green Globes

SAINT PAUL SUSTAINABLE BUILDING POLICY Outdoor water use: Reporting Requirements Detail the method used to achieve the required sections in Green Globes, including plant and irrigation selection. Submit a list of landscape areas, as detailed in the general reporting requirements section of this module. Green Globes

SAINT PAUL SUSTAINABLE BUILDING POLICY B3 - Minnesota Sustainable Building Guidelines B3 – MINNESOTA SUSTAINABLE BUILDING GUIDELINES WATER REQUIREMENTS

SAINT PAUL SUSTAINABLE BUILDING POLICY MSBG: Indoor water use requirement Achieve required MSBG criteria S.8 – Building Water Efficiency. – This will require entering estimated use rates into the B3 tracking tool, available at B3 - Minnesota Sustainable Building Guidelines

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use requirement Use the B3 tracking tool to ensure compliance, navigate to the S.8 tab B3 - Minnesota Sustainable Building Guidelines

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use requirement Open the tab corresponding with the phase of design that you are in. B3 - Minnesota Sustainable Building Guidelines

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use requirement Fill out the required information (note that the required information here can be calculated using the Indoor_water_ use_calculator) B3 - Minnesota Sustainable Building Guidelines

SAINT PAUL SUSTAINABLE BUILDING POLICY B3 - Minnesota Sustainable Building Guidelines Indoor water use: Reporting Requirements Fill out an Indoor_water_use_calculator workbook, providing a list of specified fixtures or equipment, their location in the project, and their nominal flush or flow rates. Submit the completed calculator and fixture list to DSI and PED at

SAINT PAUL SUSTAINABLE BUILDING POLICY MSBG: Outdoor water use requirement Achieve required MSBG criteria S.7 – Landscape Water Efficiency. – This will require entering estimated use rates into the B3 tracking tool, available at B3 - Minnesota Sustainable Building Guidelines

SAINT PAUL SUSTAINABLE BUILDING POLICY Outdoor water use requirement Use the B3 tracking tool to ensure compliance, navigate to the S.7 tab B3 - Minnesota Sustainable Building Guidelines

SAINT PAUL SUSTAINABLE BUILDING POLICY Outdoor water use requirement Open the tab corresponding with the phase of design that you are in. B3 - Minnesota Sustainable Building Guidelines

SAINT PAUL SUSTAINABLE BUILDING POLICY Outdoor water use requirement Fill out the required information (note that the information here can be calculated using the Outdoor_water_ use_calculator or the equivilant B3- MSBG calculator). B3 - Minnesota Sustainable Building Guidelines

SAINT PAUL SUSTAINABLE BUILDING POLICY Outdoor water use: Reporting Requirements Fill out an Outdoor_water_use_calculator workbook, providing a list of landscape elements, species factor and other relevant plant selection information, and expected irrigation efficiency, if irrigation is included in the project. A template for this list is available at Submit the completed calculator to PED and DSI at B3 - Minnesota Sustainable Building guidelines

SAINT PAUL SUSTAINABLE BUILDING POLICY Green Communities MINNESOTA GREEN COMMUNITIES WATER REQUIREMENTS

SAINT PAUL SUSTAINABLE BUILDING POLICY Green Communities Criteria: Indoor water use requirements Green Communities does not include a comparable water use reduction section, instead satisfy either the Prescriptive Path or the Performance Path to assure water use reduction in flush and flow fixtures and other non-fixture water consuming devices. Achieving this requirement will help satisfy mandatory Green Communities section 4.1, which places limits on the water use of fixtures. Green Communities

SAINT PAUL SUSTAINABLE BUILDING POLICY Green Communities: Indoor water use requirements Prescriptive Path – Achieve fixture and non-fixture requirements Green Communities

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Prescriptive Path, Fixture requirements Each fixture must use 30% less water than prescribed by the Energy Policy Act of Use these maximum flow rates for the following fixture types: – Toilets: 1.12 gpf, can be an average for dual flush toilets. – Bathroom Faucets/Aerators: 1.54 gpm at 60 psi – Kitchen Faucets/Aerators: 1.54 gpm at 60 psi – Showerheads: 1.75gpm at 80 psi Green Communities

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Prescriptive Path, Non-Fixture Devices Choose non-fixture devices that use, when available, at least 30% less water than prescribed by the Energy Policy Act of Water coolers, water fountains, and other beverage water devices are exempt from this requirement. If dishwashers are included in the project, use ENERGY STAR qualified models. If clothes washers are included, use washers that have a water factor less than 6.0 or that are ENERGY STAR qualified. Green Communities

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Performance Path Use the Saint Paul Overlay Indoor_Water_Use_Calculator available at paul/calculators to determine the water-use reduction from a calculated base case. Ensure that the savings are at least 30%. paul/calculators Green Communities

SAINT PAUL SUSTAINABLE BUILDING POLICY Green Communities Indoor water use: Reporting requirements – Prescriptive Path Provide a list of all fixtures and non-fixture water consuming devices included in the project. Provide flow, flush and per-use water use for each fixture to demonstrate that every fixture in the project is at least 30% more efficient than the Energy Policy Act of 1992 levels. Provide the information above to PED and DSI at

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Reporting requirements – Performance Path Fill out the Saint Paul Indoor_water_use_calculator workbook, and provide a list of specified fixtures or equipment, their location in the project, and their nominal flush or flow rates. A template for this list is available at Provide the completed calculator to PED and DSI at Green Communities

SAINT PAUL SUSTAINABLE BUILDING POLICY Green Communities: Outdoor water use requirements Green Communities does not include a comparable irrigation reduction section. Use the Saint Paul Outdoor_Water_Use_Calculator available at paul to assure that the amount of estimated water use reduction is at least 50% from the base scenario. paul Green Communities

SAINT PAUL SUSTAINABLE BUILDING POLICY Outdoor water use: Reporting Requirements Fill out the Outdoor_water_use_calculator workbook, providing a list of landscape elements, species factor and other relevant plant selection information, and expected irrigation efficiency, if irrigation is included in the project. Submit the completed calculator to PED and DSI at Green Communities

SAINT PAUL SUSTAINABLE BUILDING POLICY Minnesota GreenStar MINNESOTA GREENSTAR WATER REQUIREMENTS

SAINT PAUL SUSTAINABLE BUILDING POLICY Minnesota GreenStar: Indoor water use requirements Indoor Water Requirements: – Achieve either the Prescribed Path or Performance Path Minnesota GreenStar

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Prescriptive Path 1, Fixture requirements Achieve the following within the Minnesota GreenStar standard: 7B-4 and either 7B-6 or 7b-7 for shower heads, 7B-10 or 7B-12 for toilets, 7B-14 or 7B-15 or 7B-17 for faucets. OR Use these maximum flow rates for the following fixture types: Toilets: 1.12 gpf, can be an average of flow rates for dual flush toilets. Bathroom Faucets/Aerators: 1.54 gpm at 60 psi Kitchen Faucets/Aerators: 1.54 gpm at 60 psi Showerheads: 1.75gpm at 80 psi Minnesota GreenStar

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Prescriptive Path, Non-Fixture Devices Choose non-fixture devices that use, when available, at least 30% less water than required by the Energy Policy Act of Water coolers, water fountains, and other beverage water devices are exempt from this requirement. If dishwashers are included in the project, use ENERGY STAR qualified models. If clothes washers are included, use washers that have a water factor less than 6.0 or that are ENERGY STAR qualified. Minnesota GreenStar

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Performance Path Use the Saint Paul Indoor_Water_Use_Calculator available at paul to determine a calculated base case and design case. The water-use of the design case must be at least 30% below the base case. paul Minnesota GreenStar

SAINT PAUL SUSTAINABLE BUILDING POLICY Minnesota GreenStar Indoor water use: Reporting requirements – Prescriptive Path Provide a list of all fixtures and non-fixture water consuming devices included in the project. Provide flow, flush, and per-use water use for each fixture to demonstrate that every fixture in the project is at least 30% more efficient than the Energy Policy Act of 1992 levels. Provide the information above to DSI and PED by ing the saved document to

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Reporting requirements – Performance Path Fill out the Saint Paul Indoor_water_use_calculator workbook, providing a list of specified fixtures or equipment, their location in the project, and their nominal flush or flow rates. Provide the completed calculator to DSI and PED by ing the saved document to Minnesota GreenStar

SAINT PAUL SUSTAINABLE BUILDING POLICY Minnesota GreenStar: Outdoor water use requirements Achieve 7 GreenStar points for credit 3C-2: Landscape System that requires no municipally-supplied well water for irrigation (food gardens exempt) (certified by a registered professional) OR Use the Saint Paul Outdoor_Water_Use_Calculator available at to assure that the amount of estimated water use reduction is at least 50% from the base scenario. This may be compatible with points awarded by Minnesota GreenStar for credits 3C-3, 3C-4, 3C-6, 3C-7, 3C-8 and 3C-9. Minnesota GreenStar

SAINT PAUL SUSTAINABLE BUILDING POLICY Outdoor water use: Reporting Requirements Either: If credit 3C-2 is used, provide available documentation describing the implementation, with supporting documents as available, including professional certification. OR Fill out the Saint Paul Outdoor_water_use_calculator workbook, providing a list of landscape elements, species factor and other relevant plant selection information, and expected irrigation efficiency, if irrigation is included in the project. AND Provide a list of vegetated areas, per general reporting requirements Provide the completed 3C-2 information or completed calculator to DSI and PED by ing the documents to Minnesota GreenStar

SAINT PAUL SUSTAINABLE BUILDING POLICY LEED for Homes LEED FOR HOMES WATER REQUIREMENTS

SAINT PAUL SUSTAINABLE BUILDING POLICY LEED for Homes: Indoor water use requirements Indoor Water Requirements: – Achieve either the Prescriptive Path or the Performance Path LEED for Homes

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Prescriptive Path, section 1 Prescriptive Path: Achieve Fixture and Non-Fixture Requirements Fixtures: – Achieve LEED for Homes Water Efficiency (WE) Credit 3.2: Very high efficiency fixtures for 6 points or – Use these maximum flow rates for the following fixture types: Toilets: 1.12 gpf, can be an average of flow rates for dual flush toilets. Bathroom Faucets/Aerators: 1.54 gpm at 60 psi Kitchen Faucets/Aerators: 1.54 gpm at 60 psi Showerheads: 1.75gpm at 80 psi LEED for Homes

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Prescriptive, Non-Fixture Devices Non-Fixtures: – Choose non-fixture devices that use, when available, at least 30% less water than the Energy Policy Act of Water coolers, water fountains, and other beverage water devices are exempt from this requirement. If dishwashers are included in the project, use ENERGY STAR Qualified models. If clothes washers are included, use washers that have a water factor less than 6.0 or that are ENERGY STAR qualified. LEED for Homes

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Performance Path Use the Saint Paul Indoor_Water_Use_Calculator available at paul to determine a calculated base case and design case. The water-use of the design case must be at least 30% below the base case. paul LEED for Homes

SAINT PAUL SUSTAINABLE BUILDING POLICY Indoor water use: Reporting Requirements Fill out the Saint Paul Indoor_water_use_calculator workbook, providing a list of specified fixtures or equipment, their location in the project, and their nominal flush or flow rates. Provide the completed calculator to DSI and PED at LEED for Homes

SAINT PAUL SUSTAINABLE BUILDING POLICY LEED for Homes: Outdoor water use requirements Achieve 6 points through LEED Sustainable Sites (SS) Credit 2.5: Reduce Overall Irrigation Demand by at Least 20% (6 points is awarded for a reduction in demand for at least 45%) and at least two points for Water Efficiency (WE) Credit 2.3: Reduce Irrigation Demand by at Least 45%. These credit categories combine to give 8 points. LEED for Homes

SAINT PAUL SUSTAINABLE BUILDING POLICY Outdoor water use: Reporting Requirements Submit information and calculations required for LEED for Homes credit 2.5. Include a list of vegetated areas and their properties per the general reporting requirements (template available at paul). LEED for Homes

SAINT PAUL SUSTAINABLE BUILDING POLICY ADDITIONAL RESOURCES

SAINT PAUL SUSTAINABLE BUILDING POLICY Additional Resources EPA WaterSense program: – Toilet performance testing (MaP scores) – ENERGY STAR program – Saint Paul Sustainable Building Policy

SAINT PAUL SUSTAINABLE BUILDING POLICY End of Module 4