WATER EFFICIENCY. Credits shown in gray do not have substantive changes and are not open for public comment.

Transcription

1 LEED Rating System 4 th public comment draft WATER EFFICIENCY Includes: Building Design & Construction Interior Design & Construction Existing Buildings: Operations and Maintenance Neighborhood Development Credits shown in gray do not have substantive changes and are not open for public comment.

2 WATER EFFICIENCY (WE)... 3 WE Prerequisite: Outdoor Water Use Reduction... 3 NC, CS, Schools, Retail, Data Centers, Warehouses & Distribution Centers, Hospitality, Healthcare... 3 WE Prerequisite: Indoor Water Use Reduction... 4 NC, CS, Schools, NC-Retail, Data Centers, Warehouses & Distribution Centers, NC-Hospitality, Healthcare, CI, CI-Retail, CI-Hospitality... 4 EBOM, Schools, Retail, Data Centers, Hospitality, Warehouses & Distribution Centers... 8 ND Plan, ND... 9 WE Prerequisite: Building-Level Water Metering NC, CS, Schools, Retail, Data Centers, Warehouses & Distribution Centers, Hospitality, Healthcare EBOM, Schools, Retail, Data Centers, Hospitality, Warehouses & Distribution Centers WE Credit: Outdoor Water-Use Reduction NC, CS, Schools, Retail, Data Centers, Warehouses & Distribution Centers, Hospitality, Healthcare EBOM, Retail, Data Centers, Hospitality, Schools, Warehouses & Distribution Centers ND Plan, ND (GIB) WE Credit: Indoor Water Use Reduction NC, CS, Schools, NC-Retail, Warehouses & Distribution Centers, NC-Hospitality, Healthcare, CI, CI-Retail, CI-Hospitality EBOM, Schools, Retail, Data Centers, Hospitality, Warehouses & Distribution Centers ND Plan, ND (GIB) GIB Credit: Wastewater Management ND Plan, ND (GIB) WE Credit: Cooling Tower Water Use NC, CS, Schools, Retail, Data Centers, Warehouses & Distribution Centers, Hospitality, Healthcare, EBOM, Schools, Retail, Data Centers, Hospitality, Warehouses & Distribution Centers WE Credit: Water Metering NC, CS, Schools, Retail, Data Centers, Warehouses & Distribution Centers, Hospitality, Healthcare EBOM, Schools, Retail, Data Centers, Hospitality, Warehouses & Distribution Centers

3 WATER EFFICIENCY (WE) WE PREREQUISITE: OUTDOOR WATER USE REDUCTION Required BD&C This prerequisite applies to New Construction Core & Shell Schools Retail Data Centers Warehouses & Distribution Centers Hospitality Healthcare Intent To reduce outdoor water consumption. Requirements NC, CS, SCHOOLS, RETAIL, DATA CENTERS, WAREHOUSES & DISTRIBUTION CENTERS, HOSPITALITY, HEALTHCARE Reduce outdoor water use through one of the following options. Nonvegetated surfaces, such as permeable or impermeable pavement, should be excluded from the landscape area calculations. Athletic fields and playgrounds (if vegetated) and food gardens may be included or excluded at the project team s discretion. Option 1. No Irrigation Required Show that the landscape does not require a permanent irrigation system beyond a maximum two-year establishment period. OR Option 2. Reduced Irrigation Reduce the project s landscape water requirement by at least 30% from the calculated baseline for the site s peak watering month. Reductions must be achieved through plant species selection and irrigation system efficiency, as calculated by the Environmental Protection Agency (EPA) WaterSense Water Budget Tool. 3

4 WE PREREQUISITE: INDOOR WATER USE REDUCTION Required BD&C This prerequisite applies to New Construction Core & Shell Schools Retail Data Centers Warehouses & Distribution Centers Hospitality Healthcare ID&C This prerequisite applies to Commercial Interiors Retail Hospitality EB:O&M This prerequisite applies to Existing Buildings: Operations & Maintenance EB:O&M Schools EB:O&M Retail EB:O&M Data Centers EB:O&M Hospitality EB:O&M Warehouses & Distribution Centers ND This prerequisite applies to Neighborhood Development Plan Neighborhood Development Intent To reduce indoor water consumption. Requirements NC, CS, SCHOOLS, NC-RETAIL, DATA CENTERS, WAREHOUSES & DISTRIBUTION CENTERS, NC-HOSPITALITY, HEALTHCARE, CI, CI-RETAIL, CI-HOSPITALITY Building Water Use For the fixtures and fittings listed in Table 1, as applicable to the project scope, reduce aggregate water consumption by 20% from the baseline. Base calculations on the volumes and flow rates shown in Table 1. All newly installed toilets, urinals, private lavatory faucets, and showerheads that are eligible for labeling must be WaterSense labeled (or a local equivalent for projects outside the United States). ID&C only Projects where fixtures or fixture fittings are not within the tenant spaces are exempt from this prerequisite. 4

5 Table 1. Baseline water consumption of fixtures and fittings Fixture or fitting Baseline (imperial units) Baseline (metric units) Toilet (water closet)* 1.6 gpf 6 lpf Urinal* 1.0 gpf 3.8 lpf Public lavatory (restroom) faucet 0.5 gpm at 60 psi** all others except private applications 1.9 lpm at 415 kpa, all others except private applications Private lavatory faucets 2.2 gpm at 60 psi 8.3 lpm at 415 kpa Kitchen faucet (excluding faucets used exclusively for filling operations) 2.2 gpm at 60 psi 8.3 lpm at 415 kpa Showerhead* 2.5 gpm at 80 psi per shower stall 9.5 lpm at 550 kpa per shower stall * WaterSense label available for this product type gpf = gallons per flush gpm = gallons per minute psi = pounds per square inch lpf = liters per flush lpm = liters per minute kpa = kilopascals Appliance and Process Water Use Install appliances, equipment, and processes within the project scope that meet the requirements listed in the tables below. Table 2. Standards for appliances Appliance Residential clothes washers Requirement ENERGY STAR or performance equivalent Commercial clothes washers CEE Tier 3A Residential dishwashers (standard and compact) ENERGY STAR or equivalent Prerinse spray valves Ice machine gpm = gallons per minute lpm = liters per minute 1.3 gpm (4.9 lpm) ENERGY STAR or equivalent and use either aircooled or closed-loop cooling, such as chilled or condenser water system 5

6 Table 3. Standards for processes Process Heat rejection and cooling Cooling towers and evaporative condensers Requirement No once-through cooling with potable water for any equipment or appliances that reject heat Equip with makeup and blowdown meters conductivity controllers and overflow alarms efficient drift eliminators that reduce drift to maximum of 0.002% of recirculated water volume for counterflow towers and 0.005% of recirculated water flow for cross-flow towers Healthcare, Retail, Schools, and Hospitality Only In addition, water-consuming appliances, equipment, and processes must meet the requirements listed in Tables 4 and 5. Table 4. Standards for appliances Kitchen equipment Requirement (imperial units) Requirement (metric units) Dishwasher Undercounter 1.6 gal/rack 6.0 liters/rack Stationary, single tank, door Single tank, conveyor Multiple tank, conveyor 1.4 gal/rack 1.0 gal/rack 0.9 gal/rack 5.3 liters/rack 3.8 liters/rack 3.4liters/rack Flight machine 180 gal/hour 680 liters/hour Food steamer batch 6 gal/hour/pan 23 liters/hour/pan Cook-to-order 10 gal/hour/pan 38 gal/hour/pan Combination oven, Countertop or stand 3.5 gal/hour/pan 13 gal/hour/pan Roll-in 3.5 gal/hour/pan 13 gal/hour/pan Table 5. Process requirements 6

7 Discharge water temperature tempering Venturi-type flow-through vacuum generators or aspirators Where local requirements limit discharge temperature of fluids into drainage system, use tempering device that runs water only when equipment discharges hot water OR Provide thermal recovery heat exchanger that cools drained discharge water below code-required maximum discharge temperatures while simultaneously preheating inlet makeup water OR If fluid is steam condensate, return it to boiler Use no device that generates vacuum by means of water flow through device into drain 7

8 EBOM, SCHOOLS, RETAIL, DATA CENTERS, HOSPITALITY, WAREHOUSES & DISTRIBUTION CENTERS ESTABLISHMENT For the indoor plumbing fixtures and fittings listed in Table 1, reduce water consumption to or below the LEED 2012 for Existing Buildings: Operations & Maintenance baseline, calculated assuming 100% of the building s indoor plumbing fixtures and fittings meet the flush and flow rates listed in Table 1. The LEED 2012 for Existing Buildings: Operations & Maintenance water use baseline is set depending on the year of building s occupancy, as follows: For a building with a certificate of occupancy dated 1995 or later, the baseline is 120% of the water use that would result if all fixtures met the code requirements in Table 1. For a building with a certificate of occupancy dated before 1995, the baseline is 150% of the water use that would result if all fixtures met the code requirements in Table 1. Table 1. Fixture and fitting code requirements Fixture or fitting Baseline (imperial units) Baseline (metric units) Toilet (water closet) 1.6 gpf 6 lpf Urinal 1.0 gpf 3.8lpf Public lavatory (restroom) faucet 0.5 gpm at 60 psi** all others except private applications 1.9 lpm at 415 kpa, all others except private applications Private lavatory faucet 2.2 gpm at 60 psi 8.3 lpm at 415 kpa Kitchen faucet (excluding faucets used exclusively for filling operations) 2.2 gpm at 60 psi 8.3 lpm at 415 kpa Showerhead 2.5 gpm at 80 psi per shower stall 9.5 lpm at 550 kpa per shower stall gpf = gallons per flush gpm = gallons per minute psi = pounds per square inch lpf = liters per flush lpm = liters per minute kpa = kilopascals If indoor plumbing systems were renovated after initial occupancy of the building, set a whole-building average baseline by prorating the above limits, based on the proportion of plumbing fixtures installed during the plumbing renovations in each period. Pre-1995 buildings that have had only minor fixture retrofits (e.g., aerators, showerheads, flushing valves) but no plumbing renovations in or after 1995 may use the 150% baseline for the whole building. Calculate fixture and fitting performance to compare the water use of the as-installed fixtures and fittings with the use of UPC- or IPC-compliant (baseline) fixtures and fittings. Inspect all existing fittings or fixtures to ensure they are operating properly. Make any repairs needed to bring all fixtures into good working order or permanently turn off water supply to nonfunctional units. 8

9 Implement a fixture and fitting replacement and retrofit policy specifying that all newly installed toilets, urinals, private lavatory faucets, and showerheads that are eligible for labeling be WaterSense labeled (or a local equivalent for projects outside the United States). Retail, Hospitality and Schools only Have in place a process and appliance water equipment purchasing policy for the building and site addressing the products listed in Table 2. The policy must cover at least those products purchased within the building and site management s control. Table 2. Standards for appliances Appliance Residential clothes washer Requirement ENERGY STAR or performance equivalent Commercial clothes washer Residential dishwasher, standard or compact Prerinse spray valve Ice machine gpm = gallons per minute lpm = liters per minute CEE Tier 3A ENERGY STAR or performance equivalent 1.3 gpm (4.9 lpm) ENERGY STAR or performance equivalent, and use either air-cooled or closed-loop cooling, such as chilled or condenser water system The policy must describe the physical and programmatic scope, duration of applicability, responsible parties (by name or title), sustainability goals and objectives, procedures and strategies for implementation, specific metrics for performance, and a quality assurance process to evaluate and verify implementation. PERFORMANCE For building water use, confirm that calculations are up to date. Demonstrate that all applicable purchases made since the end of the performance period meet the requirements of the fixture and fitting replacement and retrofit policy. For appliances, demonstrate that appliances purchased and installed within the building meet the requirements listed in Table 2. Appliances not listed are not subject to any additional requirements. ND PLAN, ND Case 1. Nonresidential Buildings, Mixed-Use Buildings, and Multifamily Residential Buildings Four Stories or More For new buildings and buildings undergoing major renovations as part of the project, reduce indoor water usage by an average of 20% from a baseline. All newly installed toilets, urinals, private lavatory faucets, 9

10 and showerheads that are eligible for labeling must be WaterSense labeled (or a local equivalent for projects outside the United States). For the fixtures and fittings listed in Table 1, as applicable to the project scope, reduce water consumption by 20% from the baseline. Base calculations on the volumes and flow rates shown in Table 1. The design case is calculated as a weighted average of water usage for the buildings constructed as part of the project based on their floor area. Table 1. Baseline water consumption of fixtures and fittings Fixture or fitting Baseline (imperial units) Baseline (metric units) Toilet (water closet)* 1.6 gpf 6 lpf Urinal* 1.0 gpf 3.8 lpf Public lavatory (restroom) faucet 0.5 gpm at 60 psi** all others except private applications 1.9 lpm at 415 kpa, all others except private applications Private lavatory faucet* 2.2 gpm at 60 psi 8.3 lpm at 415 kpa Kitchen faucet (excluding faucets used exclusively for filling operations) 2.2 gpm at 60 psi 8.3 lpm at 415 kpa Showerhead* 2.5 gpm at 80 psi per shower stall 9.5 lpm at 550 kpa per shower stall * WaterSense label available for this product type gpf = gallons per flush gpm = gallons per minute psi = pounds per square inch lpf = liters per flush lpm = liters per minute kpa = kilopascals Case 2. New Single-Family Residential Buildings and New Multiunit Residential Buildings Three Stories or Fewer 90% of residential buildings must use a combination of fixtures and fittings that would earn 2 points under LEED for Homes 2012 WE Credit Indoor Water Use. 10

11 WE PREREQUISITE: BUILDING-LEVEL WATER METERING Required BD&C This prerequisite applies to New Construction Core & Shell Schools Retail Data Centers Warehouses & Distribution Centers Hospitality Healthcare EB:O&M This prerequisite applies to Existing Buildings: Operations & Maintenance EB:O&M Schools EB:O&M Retail EB:O&M Data Centers EB:O&M Hospitality EB:O&M Warehouses & Distribution Centers Intent To support water management and identify opportunities for additional water savings by tracking water consumption. Requirements NC, CS, SCHOOLS, RETAIL, DATA CENTERS, WAREHOUSES & DISTRIBUTION CENTERS, HOSPITALITY, HEALTHCARE Install permanent water meters that measure the total potable water use for the building and associated grounds. Commit to sharing with USGBC the resulting whole-project water usage data for a five-year period beginning on the date the project accepts LEED certification from the Green Building Certification Institute (GBCI) or typical occupancy, whichever comes first. At a minimum, water consumption must be tracked at one-month intervals or at utility billing intervals. This commitment must carry forward for five years or until the building changes ownership or lessee. EBOM, SCHOOLS, RETAIL, DATA CENTERS, HOSPITALITY, WAREHOUSES & DISTRIBUTION CENTERS ESTABLISHMENT Establish permanently installed water meters that measure the total potable water use for the building and associated grounds. Metering of any gray or reclaimed water supplied to the building is encouraged but not required. PERFORMANCE Meter data must be recorded on a regular basis and compiled into monthly and annual summaries; meter readings can be manual or automated. 11

12 Commit to sharing with USGBC the resulting whole-project water usage data for a five-year period beginning on the date the project accepts LEED certification from the Green Building Certification Institute (GBCI) or typical occupancy, whichever comes first. At a minimum, water consumption must be tracked at one-month intervals or at utility billing intervals. This commitment must carry forward for five years or until the building changes ownership or lessee. 12

13 WE CREDIT: OUTDOOR WATER-USE REDUCTION BD&C 1 2 points This credit applies to New Construction (1 2 points) Core & Shell (1 2 points) Schools (1 2 points) Retail (1 2 points) Data Centers (1 2 points) Warehouses & Distribution Centers (1 2 points) Hospitality (1 2 points) Healthcare (1 point) EB:O&M 1 2 points This credit applies to Existing Buildings: Operations & Maintenance (1 2 points) EB:O&M Schools (1 2 points) EB:O&M Retail (1 2 points) EB:O&M Data Centers (1 2 points) EB:O&M Hospitality (1 2 points) EB:O&M Warehouses & Distribution Centers (1 2 points) ND (GIB) 1 2 points This credit applies to Neighborhood Development Plan Neighborhood Development Intent To reduce outdoor water consumption. Requirements NC, CS, SCHOOLS, RETAIL, DATA CENTERS, WAREHOUSES & DISTRIBUTION CENTERS, HOSPITALITY, HEALTHCARE Reduce outdoor water use through one of the following options. Nonvegetated surfaces, such as permeable or impermeable pavement, should be excluded from landscape area calculations. Athletic fields and playgrounds (if vegetated) and food gardens may be included or excluded at the project team s discretion. Option 1. No Irrigation Required (2 points except Healthcare, 1 point Healthcare) Show that the landscape does not require a permanent irrigation system beyond a maximum two-year establishment period. OR Option 2. Reduced Irrigation (2 points except Healthcare, 1 point Healthcare) 13

14 Reduce the project s landscape water requirement (LWR) by at least 50% from the calculated baseline for the site s peak watering month. Reductions must first be achieved through plant species selection and irrigation system efficiency as calculated in the Environmental Protection Agency (EPA) WaterSense Water Budget Tool. Additional reductions beyond 30% may be achieved using any combination of efficiency, alternative water sources, and smart scheduling technologies. Table 1. Points for reducing irrigation water Percentage reduction from baseline Points (except Healthcare) Points (Healthcare) 50% % 2 EBOM, RETAIL, DATA CENTERS, HOSPITALITY, SCHOOLS, WAREHOUSES & DISTRIBUTION CENTERS Reduce outdoor water use through one of the following options. Nonvegetated surfaces, such as permeable or impermeable pavement, should be excluded from landscape area calculations. Athletic fields and playgrounds (if vegetated) and food gardens may be included or excluded at the project team s discretion. If landscape irrigation is not submetered, use Option 2. ESTABLISHMENT Option 1. No Irrigation Required (2 points) Show that the landscape does not require irrigation beyond a maximum two-year plant establishment period. Option 2. No Irrigation Meter: Calculated Water Budget (1 2 points) Use the existing landscape to calculate the landscape water requirement using the EPA WaterSense Water Budget Tool. Install an irrigation meter. Option 3. Irrigation Meter Installed (1 2 points) Calculate an outdoor water use baseline using at least12 months of metered data from the past five years. PERFORMANCE Option 1. No Irrigation Required (2 points) Confirm that the landscape does not require irrigation. Option 2. No Irrigation Meter: Calculated Water Budget (1 2 points) Points are earned according to Table 1. Option 3. Irrigation Meter Installed (1 2 points) Demonstrate a reduction in outdoor water use over the most recent 12 months compared with the established baseline. Points are earned according to Table 1. Table 1. Points for reducing irrigation water Percentage reduction from baseline Points 14

15 30% 1 40% 2 15

16 ND PLAN, ND (GIB) Reduce outdoor water use through one of the following options. Nonvegetated surfaces, such as permeable or impermeable pavement, should be excluded from landscape area calculations. Athletic fields and playgrounds (if vegetated) and food gardens may be included or excluded at the project team s discretion. Option 1. No Irrigation Required (2 points) Show that the landscape does not require a permanent irrigation system beyond a maximum two-year establishment period. OR Option 2. Reduced Irrigation (1 2 points) Reduce the project s landscape water requirement (LWR) by at least 30% from the calculated baseline for the site s peak watering month. Reductions must first be achieved through plant species selection and irrigation system efficiency as calculated in the Environmental Protection Agency (EPA) WaterSense Water Budget Tool. Additional reductions beyond 30% may be achieved using any combination of efficiency, alternative water sources, and smart scheduling technologies. Table 1. Points for reducing irrigation water Percentage reduction from baseline Points 30% 1 50% 2 16

17 WE CREDIT: INDOOR WATER USE REDUCTION BD&C 2 7 points This credit applies to New Construction (2 6 points) Core & Shell (2 6 points) Schools (2 7 points) Retail (2 7 points) Data Centers (2 6 points) Warehouses & Distribution Centers (2 6 points) Hospitality (2 6 points) Healthcare (2 7 points) ID&C 2 12 points This credit applies to Commercial Interiors (2 12 points) Retail (2 12 points) Hospitality (2 12 points) EB:O&M 2 5 points This credit applies to Existing Buildings: Operations & Maintenance (2 5 points) EB:O&M Schools (2 5 points) EB:O&M Retail (2 5 points) EB:O&M Data Centers (2 4 points) EB:O&M Hospitality (2 5 points) EB:O&M Warehouses & Distribution Centers (2 5 points) ND 1 point This credit applies to Neighborhood Development Plan Neighborhood Development Intent To reduce indoor water consumption. Requirements NC, CS, SCHOOLS, NC-RETAIL, WAREHOUSES & DISTRIBUTION CENTERS, NC-HOSPITALITY, HEALTHCARE, CI, CI-RETAIL, CI-HOSPITALITY Further reduce fixture and fitting water use from the calculated baseline in WE Prerequisite Indoor Water Use Reduction. Additional potable water savings can be earned above the prerequisite level using alternative water sources. Include fixtures and fittings necessary to meet the needs of the occupants. Some of these fittings and fixtures may be outside the tenant space (for Commercial Interiors) or project boundary (for New Construction). Points are awarded according to Table 1. Table 1. Points for reducing water use 17

18 Percentage reduction Points (BD&C) Points (Schools, Retail, Hospitality, Healthcare) Points (ID&C) Points (CI Retail) Points (CI Hospitali ty) 25% % % % % % Schools, Retail, Hospitality, and Healthcare only Meet the percentage reduction requirements above. AND Appliance and Process Waterinstall equipment within the project scope that meets the minimum requirements in Table 2, 3, 4, or 5. One point is awarded for meeting all applicable requirements in any one table. All applicable equipment listed in each table must meet the standard. Schools, Retail, and Healthcare projects can earn a second point for meeting the requirements of two tables. Table 2. Compliant commercial washing machines To use Table 1, the project must process at least 120,000 lbs ( kg) of laundry per year. Washing machine Requirement (imperial units) Requirement (metric units) On-premise, minimum capacity 2,400 lbs ( kg) per 8- hour shift Maximum 1.8 gals per pound * Maximum 7 liters per 0.45 kilograms * * Based on equal quantities of heavy, medium, and light soil laundry. Table 3. Standards for commercial kitchen equipment To use Table 3, the project must serve at least 100 meals per day of operation. All process and appliance equipment listed in the category of kitchen equipment and present on the project must comply with the standards. Kitchen equipment Requirement (imperial units) Requirement (metric units) 18

19 Dishwasher Undercounter ENERGY STAR ENERGY STAR performance equivalent Stationary, single tank, door ENERGY STAR ENERGY STAR performance equivalent Food steamer Combination oven, Food waste disposer Single tank, conveyor Multiple tank, conveyor ENERGY STAR ENERGY STAR Flight machine 150 gph and 1 gal/100 9 dishes Batch (no drain connection) Cook-to-order (with drain connection) Countertop or stand Roll-in Grinder 2 gal/hour/pan including condensate cooling water 5 gal/hour/pan including condensate cooling water 1.5 gal/hour/panincluding condensate cooling water 1.5 gal/hour/pan including condensate cooling water 1 gpm, no-load condition; 3 8 gpm, full load condition; 10-minute automatic shutoff Scrap collector Maximum 2 gpm makeup water ENERGY STAR performance equivalent ENERGY STAR performance equivalent 568 lph and 6 liters/100 23cm dishes 7.5 liters/hour/pan including condensate cooling water 19 liters/hour/pan including condensate cooling water 5.7 liters/hour/pan including condensate cooling water 5.7 liters/hour/pan including condensate cooling water 4 lpm, no-load condition; lpm), full load condition; 10- minute automatic shutoff Maximum 8 lpm makeup water Pulper Maximum 2 gpm makeup water Maximum 8 lpm makeup water Strainer basket gpm = gallons per minute gph = gallons per hour lpm = liters per minute lph = liters per hour No additional water usage No additional water usage To use Table 4, the project must be a medical or laboratory facility. Table 4. Compliant laboratory and medical equipment Lab equipment Requirement (imperial units) Requirement (metric units) Reverse-osmosis water purifier 75% recovery 75% recovery 19

20 Steam sterilizer For 60-inch sterilizer, 6.3 gal/u.s. tray For 48-inch sterilizer, 7.5 gal/u.s. tray For 1520-mm sterilizer, 24 liters/u.s. tray For 1220-mm sterilizer, 28 liters/u.s. tray Sterile process washer 0.35 gal/u.s. tray 1.3 liters/u.s. tray X-ray processor, 150 mm or more in any dimension Film processor water recycling unit Digital imager, all sizes No water use Table 5. Compliant municipal steam systems To use Table 5, the project must be connected to a municipal or district steam system that does not allow the return of steam condensate. Steam system Steam condensate disposal OR Reclaim and use steam condensate Standard Cool municipally supplied steam condensate (no return) to drainage system with heat recovery system or reclaimed water 100% recovery and reuse EBOM, SCHOOLS, RETAIL, DATA CENTERS, HOSPITALITY, WAREHOUSES & DISTRIBUTION CENTERS Option 1. Calculated Water Use (2 5 points except Data Centers, 2 4 points Data Centers) ESTABLISHMENT None. PERFORMANCE Have fixtures that use less water than the baseline calculated in WE Prerequisite Indoor Water-Use Reduction. Points are awarded according to Table 1. Table 1. Points for reducing calculated water use beyond the prerequisite level. Additional Points (Data Points (except Data percentage Centers) Centers) reduction 10% % % % % 5 20

21 Confirm that calculations are up to date. Demonstrate that all purchases made since the end of the performance period meet the design performance requirements. OR Option 2. Metered Water Use (4 points except Data Centers, 3 points Data Centers) ESTABLISHMENT Meter fixtures and fittings, and record meter data for one year to establish a water-use baseline. Reset the baseline every 10 years. PERFORMANCE For projects with at least 80% of fixtures and fittings metered, show a reduction from the baseline year of meter data. Table 2. Points for reducing metered water use percentage reduction Points (except Data Centers) Points (Data Centers) 0-5% % % % 4 4 >20% 5 -- ND PLAN, ND (GIB) Case 1. Nonresidential Buildings, Mixed-Use Buildings, and Multifamily Residential Buildings Four Stories or More For new buildings and buildings undergoing major renovations as part of the project, reduce indoor water usage by an average of 40% from a baseline All newly installed toilets, urinals, private lavatory faucets, and showerheads that are eligible for labeling must be WaterSense labeled (or local equivalent for projects outside the United States). For fixtures and fittings listed in Table 1, as applicable to the project scope, calculate the baseline water consumption using estimated occupant usage. The design case is calculated as a weighted average of water usage for the buildings constructed as part of the project, based on their floor area. Table 1. Baseline water consumption of fixtures and fittings Fixture or fitting Baseline (imperial units) Baseline (metric units) Toilet (water closet)* 1.6 gpf 6 lpf Urinal* 1.0 gpf 3.8 lpf 21

22 Public lavatory (restroom) faucet 0.5 gpm at 60 psi** all others except private applications 1.9 lpm at 415 kpa, all others except private applications Private lavatory faucet* 2.2 gpm at 60 psi 8.3 lpm at 415 kpa Kitchen faucet (excluding faucets used exclusively for filling operations) 2.2 gpm at 60 psi 8.3 lpm at 415 kpa Showerhead* 2.5 gpm at 80 psi per shower stall 9.5 lpm at 550 kpa per shower stall * WaterSense label available for this product type gpf = gallons per flush gpm = gallons per minute psi = pounds per square inch lpf = liters per flush lpm = liters per minute kpa = kilopascals Case 2. New Single-Family Residential Buildings and New Multiunit Residential Buildings Three Stories or Fewer 90% of buildings must use a combination of fixtures and fittings that would earn 4 points under LEED for Homes 2012 WE Credit Indoor Water Use. 22

23 GIB CREDIT: WASTEWATER MANAGEMENT ND 1 2 points This credit applies to Neighborhood Development Plan Neighborhood Development Intent To reduce pollution from wastewater and encourage water reuse.. Requirements ND PLAN, ND (GIB) Design and construct the project to retain on-site at least 25% of the average annual wastewater generated by the project (excluding any existing buildings), and reuse that wastewater to replace potable water. Provide on-site treatment to the applicable NSF 350 standard or a quality required by state and local regulations for the proposed reuse, whichever is more stringent. Calculate the percentage of wastewater diverted and reused by determining the total wastewater flow, using the design case from GIB Prerequisite Indoor Water Use Reduction and adding wastewater flow from residential buildings, then determining how much of that volume is reused on site. Table 1. Points for reusing wastewater Percentage of wastewater reused Points 25% 1 50% 2 23

24 WE CREDIT: COOLING TOWER WATER USE BD&C 1 2 points This credit applies to New Construction (1 2 points) Core & Shell (1 2 points) Schools (1 2 points) Retail (1 2 points) Data Centers (1 2 points) Warehouses & Distribution Centers (1 2 points) Hospitality (1 2 points) Healthcare (1 2 points) EB:O&M 1 4 points This credit applies to Existing Buildings: Operations & Maintenance (1 3 points) EB:O&M Schools (1 3 points) EB:O&M Retail (1 3 points) EB:O&M Data Centers (1 4 points) EB:O&M Hospitality (1 3 points) EB:O&M Warehouses & Distribution Centers (1 3 points) Intent To conserve water used for cooling tower makeup while controlling microbes, corrosion, and scale in the condenser water system. Requirements NC, CS, SCHOOLS, RETAIL, DATA CENTERS, WAREHOUSES & DISTRIBUTION CENTERS, HOSPITALITY, HEALTHCARE, For cooling towers and evaporative condensers, conduct a one-time potable water analysis, measuring at least the five control parameters listed in Table 1. Table 1. Maximum concentrations for parameters in condenser water Parameter Maximum level Ca (as CaCO 3 ) Total alkalinity SiO 2 Cl- Conductivity 1000 ppm 1000 ppm 100 ppm 250 ppm 2000 µs/cm ppm = parts per million µs/cm = micro siemens per centimeter Calculate the number of cooling tower cycles by dividing the maximum allowed concentration level of each parameter by the actual concentration level of each parameter found in the potable makeup water. Limit cooling tower cycles to avoid exceeding maximum values for any of these parameters. 24

25 Table 2. Points for cooling tower cycles Cooling tower cycles Maximum number of cycles achieved without exceeding any filtration levels or affecting operation of condenser water system (up to maximum of 10 cycles) Achieve a minimum 10 cycles by increasing the level of treatment in condenser or make-up water OR Achieve a minimum 10 cycles while adding a minimum 20% recycled nonpotable water Points 1 2 EBOM, SCHOOLS, RETAIL, DATA CENTERS, HOSPITALITY, WAREHOUSES & DISTRIBUTION CENTERS ESTABLISHMENT For cooling towers and evaporative condensers, conduct a potable water analysis within five years of submission for certification, measuring at least the five control parameters listed in Table 1. Table 1. Maximum concentrations for parameters in condenser water Parameter Maximum level Ca (as CaCO 3 ) Total alkalinity SiO 2 Cl- Conductivity 1,000 ppm 1,000 ppm 100 ppm 250 ppm 2000 µs/cm ppm = parts per million µs/cm = micro siemens per centimeter Calculate the number of cooling tower cycles by dividing the maximum allowed concentration level of each parameter by the actual concentration level of each parameter found in the potable makeup water. Limit cooling tower cycles to avoid exceeding maximum values for any of these parameters. Table 2. Points for cooling tower cycles Cooling tower cycles Points (except Data Centers) Points (Data Centers) Maximum number of cycles achieved without exceeding any filtration levels or affecting operation of condenser water system (up to maximum of 10 cycles) Achieve a minimum 10 cycles by increasing the level of treatment in condenser or make-up water OR Achieve a minimum 10 cycles while adding a minimum 20% recycled nonpotable water PERFORMANCE 25

26 Confirm that the number of cooling tower cycles is up to date. 26

27 WE CREDIT: WATER METERING BD&C 1 point This credit applies to New Construction (1 point) Core & Shell (1 point) Schools (1 point) Retail (1 point) Data Centers (1 point) Warehouses & Distribution Centers (1 point) Hospitality (1 point) Healthcare (1 point) EB:O&M 2 points This credit applies to Existing Buildings: Operations & Maintenance (2 points) EB:O&M Schools (2 points) EB:O&M Retail (2 points) EB:O&M Data Centers (2 points) EB:O&M Hospitality (2 points) EB:O&M Warehouses & Distribution Centers (2 points) Intent To support water management and identify opportunities for additional water savings by tracking water consumption. Requirements NC, CS, SCHOOLS, RETAIL, DATA CENTERS, WAREHOUSES & DISTRIBUTION CENTERS, HOSPITALITY, HEALTHCARE Install permanent water meters for two or more of the following water subsystems, as applicable to the project: Irrigation. Meter water systems serving at least 80% of the irrigated landscaped area. Calculate the percentage of irrigated landscape area served as the total metered irrigated landscape area divided by the total irrigated landscape area. Landscape areas fully covered with xeriscaping or native vegetation that requires no routine irrigation may be excluded from the calculation. Indoor plumbing fixtures and fittings. Meter water systems serving at least 80% of the indoor fixtures and fitting described in WE Prerequisite Indoor Water Use Reduction, either directly or by deducting all other measured water use from the measured total water consumption of the building and grounds. Domestic hot water. Meter water use of at least 80% of the installed domestic hot water heating capacity (including both tanks and on-demand heaters). Boiler with aggregate projected annual water use of 100,000 gallons ( liters) or more, or boiler of more than 500,000 BtuH (150 kw). A single makeup meter may record flows for multiple boilers. 27

28 Reclaimed water. Meter reclaimed water, regardless of rate. A reclaimed water system with a makeup water connection must also be metered so that the true reclaimed water component can be determined. Other process water. Meter at least 80% of expected daily water consumption for process end uses, such as humidification systems, dishwashers, clothes washers, pools, and other subsystems using process water. Healthcare Projects only In addition to the requirements above, install water meters in any five of the following: purified water systems (reverse-osmosis, de-ionized); filter backwash water; water use in dietary department; water use in laundry; water use in laboratory; water use in central sterile and processing department; water use in physiotherapy and hydrotherapy and treatment areas; water use in surgical suite; closed-looped hydronic system makeup water; and cold-water makeup for domestic hot water systems. EBOM, SCHOOLS, RETAIL, DATA CENTERS, HOSPITALITY, WAREHOUSES & DISTRIBUTION CENTERS ESTABLISHMENT Establish permanently installed meters; 1 point for two water subsystems, 2 points for four or more water subsystems: Irrigation. Meter water systems serving at least 80% of the irrigated landscaped area. Calculate the percentage of irrigated landscape area as the total metered irrigated landscape area divided by the total irrigated landscape area. Landscape areas fully covered with xeriscaping or native vegetation that requires no routine irrigation may be excluded from the calculation. Indoor plumbing fixtures and fittings. Meter water systems serving at least 80% of the indoor plumbing fixtures and fittings listed in WE Prerequisite Indoor Water-Use Reduction, either directly or by deducting all other measured water use from the measured total water consumption of the building and grounds, Cooling towers. Meter replacement water use of all cooling towers serving the facility. Domestic hot water. Meter water use of at least 80% of the installed domestic hot water heating capacity (including both tanks and on-demand heaters). Reclaimed water. Meter reclaimed water, regardless of rate. A reclaimed water system with a makeup water connection must also be metered so that the true reclaimed water component can be determined.. Other process water. Meter at least 80% of expected daily water consumption for process end uses, such as humidifiers, dishwashers, clothes washers, and pools. PERFORMANCE 28

29 Metering must be continuous and data-logged (at least weekly) to allow for an analysis of time trends. Compile monthly and annual summaries of results for each subsystem metered. Meters must be calibrated within the manufacturer s recommended interval if the building owner, management organization, or tenant owns the meter. Meters owned by third parties (e.g., utilities or governments) are exempt. Commit to sharing with USGBC the resulting water usage data for a five-year period beginning on the date the project accepts LEED certification from the Green Building Certification Institute (GBCI) or typical occupancy, whichever comes first. 29