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LEED AP BD+C Ryan > Water Efficiency - WE > Flashcards

Water Efficiency - WE Flashcards

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1
Q

(WE - Outdoor Water Use Reduction Pre) What percentage reduction in irrigation from baseline for peak watering month must be achieved?

A

30% of irrigation water use

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2
Q

(WE - Outdoor Water Use Reduction Pre) Option 1 - How does the project team show that no irrigation is required?

A

1) Show a site plan with vegetated areas.

2) Create a narrative for plant species and water requirements.

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3
Q

(WE - Outdoor Water Use Reduction Pre) Option 2 - How does the project team prove that landscape water has been reduced by at least 30%

A

1) Use design to reduce irrigation needs. Select appropriate plants, use efficient irrigation methods.
2) Calculate landscape water budget. Use the EPA WaterSense Water Budget Tool

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4
Q

(WE - Indoor Water Use Reduction Pre) What percentage reduction for all fixtures listed in Table 1 must be achieved?

A

20% of indoor fixture water use

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5
Q

(WE - Indoor Water Use Reduction Pre) What label must all newly installed toilets, urinals, private lavatory faucets, and showerheads have?

A

WaterSense label

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6
Q

(WE - Indoor Water Use Reduction Pre) What is the baseline usage for toilets?

A

1.6 gpf

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7
Q

(WE - Indoor Water Use Reduction Pre) What is the baseline usage for urinals?

A

1.0gpf

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8
Q

(WE - Indoor Water Use Reduction Pre) What is the baseline usage for public lavatories?

A

.5gmp @ 60psi

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9
Q

(WE - Indoor Water Use Reduction Pre) What is the baseline usage for private lavatories?

A

2.2gpm @ 60psi

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10
Q

(WE - Indoor Water Use Reduction Pre) What is the baseline usage for kitchen faucets?

A

2.2gpm @ 60psi

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11
Q

(WE - Indoor Water Use Reduction Pre) What is the baseline usage for showerheads?

A

2.5pgm @ 80psi

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12
Q

(WE - Indoor Water Use Reduction Pre) What Requirement must be met for residential clothes washing machines?

A

ENERGY STAR or performance equivalent

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13
Q

(WE - Indoor Water Use Reduction Pre) What Requirement must be met for commercial clothes washing machines?

A

CEE Tier 3A

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14
Q

(WE - Indoor Water Use Reduction Pre) What Requirement must be met for residential dishwashers?

A

ENERGY STAR or performance equivalent

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15
Q

(WE - Indoor Water Use Reduction Pre) What Requirement must be met for pre-rinse spray valves?

A

< or = 1.3 gpm

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16
Q

(WE - Indoor Water Use Reduction Pre) What Requirement must be met for ice machines?

A

ENERGY STAR or performance equivalent and use

17
Q

(WE - Indoor Water Use Reduction Pre) What Requirement must be met for the heat rejection and cooling process?

A

No once-through cooling with potable water for any equipment or appliances that reject heat.

18
Q

(WE - Indoor Water Use Reduction Pre) What Requirement must be met for Cooling towers and Evaporative condensers?

A

Must be equipped with:

  • Makeup water meters
  • Conductivity controllers and overflow alarms
  • Efficient drift eliminators that reduce drift to a max of .002% of recirculated water volume for counterflow towers and .005% of recirculated water flow for cross-flow towers
19
Q

(WE - Building Level Water Metering Pre) How can one determine how much water a building is using?

A
  • Install permanent water meters that measure the total potable water use for the building.
  • Meter data must be compiled into monthly and annual summaries
20
Q

(WE - Building Level Water Metering Pre) How can one prove the water usage to earn the credit?

A
  • Share the metering results with USGBC for 5 years
  • 5 years begins on date that project accepts LEED cert, or typical occupancy (whichever comes first)
  • Commitment must carry for 5 years or until building changes ownership.
21
Q

(WE - Outdoor Water Use Reduction) What must one show in order to achieve 2pts (1pt HC) for Option 1?

A

Show that no irrigation is required

- Show that the landscape does not require a permanent irrigation system beyond a two-year establishment period

22
Q

(WE - Outdoor Water Use Reduction) Option 2. Reduced Irrigation - What percentage reduction must be achieved from the project’s baseline?

A

50% - 1pt
100% - 2pt (1pt HC)

Any reductions beyond 30% may be achieved using efficiency, alternative water sources, and smart scheduling technologies.

23
Q

(WE - Outdoor Water Use Reduction) Option 2. Reduced Irrigation - What principles should water reduction use first?

A
  • Selection of plant species

- Irrigation system efficiency

24
Q

(WE - Indoor Water Use Reduction) How many points are given by % of reduction?

A 
25% - 1pt
30% - 2pts
35% - 3pts
40% - 4pts
45% - 5pts
50% - 6pts

Think of 25-50%, every 5% +1pt

25
Q

(WE - Indoor Water Use Reduction) What types of projects have to meet additional standards for indoor water use?

A
  • Schools
  • Retail
  • Hospitality
  • Healthcare

aka buildings that ALWAYS have many occupants

26
Q

(WE - Indoor Water Use Reduction) What types of projects can earn up to 7 points by meeting the requirements of two equipment tables?

A
  • Schools
  • Retail
  • Healthcare
27
Q

(WE - Indoor Water Use Reduction) What standards are often referenced for indoor water use?

A
  • EPAct of 1992 and 2005
  • IgCC/ASHRAE 189.1
  • ANSI UPC 1-2006 (IAPMO)
  • ICC, International Plumbing Code 2006, S 604
  • ENERGY STAR
  • WaterSense
28
Q

(WE - Indoor Water Use Reduction) What percentage of water use reduction earns Exemplary Performance?

A

55%

29
Q

(WE - Cooling Tower Water Use) What parameters need to be measured when conducting a potable water analysis on a cooling tower or evaporative condenser?

A
  • Calcium (as CaCO3), maximum level 1000ppm
  • Alkalinity, maximum level 1000ppm
  • SiO2 (silicon dioxide), maximum level 100ppm
  • Chloride Cl, maximum level 250ppm
  • Conductivity, maximum level 2000μS/cm
30
Q

(WE - Cooling Tower Water Use) How does one calculate the number of cooling tower cycles?

A

Divide the max allowed concentration level of each parameter (table 1) by the actual concentration level of each parameter found in the test.

Limit cooling tower cycles to avoid exceeding max values for ANY parameters.

31
Q

(WE - Cooling Tower Water Use) How can a cooling tower earn 2pts for this credit?

A
  • Achieve a minimum of 10 cycles by increasing level of treatment in condenser or make-up water
  • Meet minimum number of cycles for 1pt, then use a minimum 20% recycled nonpotable water
32
Q

(WE - Water Metering) What subsystems can be metered to achieve this credit? (two or more of these must be metered)

A
  • Irrigation
  • Indoor plumbing fixtures
  • Domestic hot water
  • Boiler with 100,000gal+ or boiler with 500,000 BtuH+
  • Reclaimed water
  • Other process water
33
Q

(WE - Water Metering) How can a project earn this credit for metering irrigation?

A
  • Meter at least 80% of irrigated area

- Xeriscaping or native veg may be excluded

34
Q

(WE - Water Metering) How can a project earn this credit for metering Indoor plumbing fixtures and fittings?

A
  • Meter at least 80% of all fixtures
35
Q

(WE - Water Metering) How can a project earn this credit for metering Domestic Hot Water?

A
  • Meter at least 80% of all domestic hot water heating capacity (including tanks and on-demand heaters)
36
Q

(WE - Water Metering) How can a project earn this credit for metering Boilers?

A
  • A single makeup meter may record flows for multiple boilers
37
Q

(WE - Water Metering) How can a project earn this credit for metering Reclaimed water?

A
  • 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.
38
Q

(WE - Water Metering) How can a project earn this credit for metering Other Process Water?

A
  • Meter at least 80% of expected daily water consumption for process end uses (humidification systems, dishwashers, clothes washers, pools, etc.)
39
Q

(WE - Water Metering) What additional areas must a Healthcare project meter, in addition to the two areas that other projects must meter? (at least five of these)

A
  • Purified water systems (reverse-osmosis, de-ionized)
  • Filter backwash water
  • Water use in dietary dept.
  • Water use in laundry
  • Water use in Lab
  • Water use in Central Sterile & Processing
  • Water use in Physiotherapy, Hydrotherapy, and treatment areas
  • Water use in surgical suite
  • Close-looped hydronic systems makeup water
  • Cold-water makeup for domestic hot water systems

LEED AP BD+C Ryan (10 decks)

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