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LEED GA > Water Efficiency > Flashcards

Water Efficiency Flashcards

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1
Q

How many total points can be earned max for the Water Efficiency category?

A

11

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2
Q

How many prerequisites does the Water Efficiency category have?

A

3 -
Outdoor water use reduction
Indoor water use reduction
Building level water metering

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3
Q

What are the credit categorizes for Water Efficiency?

A
  • outdoor water use reduction
  • indoor water use reduction
  • cooling tower water use reduction
  • water metering
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4
Q

What is the first thing that needs to be calculated for indoor water use?

A

Baseline

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5
Q

Baseline flow & flush rates are specified by what act?

A

Energy Policy Act of 1992 (EPAct 1992)

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6
Q

What is used to determine the occupant usage of fixtures and fittings?

A

Full time equivalent (FTE)

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7
Q

For outdoor water usage, how is the baseline calculated?

A

Landscape water requirement (LWR)

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8
Q

What is the Landscape Water Requirement (LWR)?

A

The amount of water that the landscape will require during the site’s peak watering month

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9
Q

To calculate the LWR, projects use what tool?

A

EPA’s WaterSense Water Budget Tool

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10
Q

What is the EPA’s WaterSense Water Budget Tool?

A

Online calculating tool which the project team needs to input the types of vegetation, area of each vegetation, project location & irrigation system type

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11
Q

Indoor potable water consumption can be reduced by using what?

A

Water efficient fixtures and fittings and/or using non potable water sources where appropriate

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12
Q

______ is a program developed by the US EPA to identify high performance, water efficient fixtures and fittings

A

WaterSense

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13
Q

What types of fixtures and fittings can be installed to decrease potable water consumption?

A 
Dual flush toilets
High efficiency toilets 
Waterless urinals
Composting toilets
Low flow shower heads & faucets 
Faucets with low flow aerators &/or motion sensors
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14
Q

What types of water can be used for the flush water of toilets & can decrease potable water consumption?

A

Rainwater

Gray water

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15
Q

Some states do not allow what kind of water as toilet flush water?

A

Gray water

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16
Q

What is gray water?

A

Untreated household water that did not come into contact with toilet waste
Ex: used from bath water, showers, bath waste bins, laundry

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17
Q

What is black water?

A

Used water that has come into contact with waste

Ex: water collected from urinals & toilets

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18
Q

What is reclaimed water?

A

Former black water that has been treated and purified for reuse & can even be used for irrigation

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19
Q

What is process water?

A

Water used by mechanical or other types of systems in buildings such as cooling towers or medical equipment

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20
Q

What 3 types of water can be used as process water to contribute to reducing potable water consumption?

A

Reclaimed water
Harvested rainwater
Gray water

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21
Q

Define a closed loop system

A

System that doesn’t produce any waste by circulating the same median

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22
Q

Define an open system

A

Systems that constantly consume other items, use them & produce waste at the end

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23
Q

Open loop water systems require outside water, it is known as what?

A

Makeup water

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24
Q

What is makeup water?

A

Water used to replace the lost water in open systems from evaporation & blowdown

25
Q

When doing water use calculations, the water usage of flush fixtures such as urinals is measured in _________

A

Gallons per flush

26
Q

For flow fixtures (ex: sink faucets, shower heads, aerators), the water usage is measured in _____

A

Gallons per minute

27
Q

How can water consumption be reduced for irrigation?

A
  • water wise landscaping design 📐
  • water efficient irrigation technologies 🚜
  • non potable water use 💧
  • submeters to track usage 🧭
28
Q

Type of landscaping that doesn’t need any irrigation

A

Xeriscaping

29
Q

Careful plant selection can contribute to outdoor water use reduction with the use of ____ & ____, as well as clearing out ____

A

Native & adaptive plants

Invasive plants

30
Q

What landscaping technique helps keep plants cool & prevent evaporation?

A

Mulching

31
Q

What are 3 types of high performance irrigation technologies to consider for water use reduction?

A

Drip irrigation systems
Bubbler distribution systems
Chanel water directly to roots system

32
Q

Types of microirrigation systems that drip water to the roots of plants to minimize the use of irrigation water and fertilizers

A

Drip irrigation systems

33
Q

What is the most water efficient system with a short payback period?

A

Drip irrigation system

34
Q

When is the best time to perform irrigation?

A

Mornings when it is cool

35
Q

How is a landscape that doesn’t require irrigation defined? (Hint: time)

A

Landscape that does not need any irrigation beyond a max of a 2 year period

36
Q

What may be included or excluded from LEED outdoor water use calculations according to the project team’s decision?

A

Athletic fields & vegetated playgrounds

37
Q

LEED requires all projects to reduce the baseline outdoor water usage by ___% from the calculated baseline for the site’s peak watering month

A

30%

38
Q

If all the installed fixtures and fittings do not exceed WaterSense max levels, projects can earn the indoor water usage pre req by only documenting their fixtures’ & applicable appliances’ ___ or ____

A

Product cut sheets or fixture schedules

39
Q

What are the most water consuming items in a building?

A

Appliances & process equipments

40
Q

What are considered Fixtures or Fittings?

A

Toilets
Urinals
Faucets
Showerheads

41
Q

What are considered Appliances?

A

Laundry machines
Dishwashers
Pre rinse sprays
Ice machines

42
Q

What are considered Process items?

A

HVAC

Cooling towers & evaporative coolers

43
Q

What are the baseline water consumptions of a toilet and a urinal?

A

Toilet - 1.6 gpf

Urinal - 1.0 gpf

44
Q

LEED requires all projects to reduce the baseline indoor water usage ___% by utilizing more efficient fixtures and fittings with the use of WaterSense labeled products

A

20%

45
Q

____ will collect and analyze data in order to identify common traits among high and low performers and will share its findings with the project teams so they can improve their performance

A

USGBC

46
Q

How long should the whole project water data be shared with USGBC?

A

5 years, starting the date the project accepts the LEED certification or typical occupancy, whichever comes first

47
Q

How often should metered water data be collected?

A

Monthly & annually

48
Q

In the outdoor water use reduction category, projects will be awarded points if they can make a __% or __% reduction from the baseline

A

50% or 100%

49
Q

What are considered alternative water sources?

A
  • reclaimed wastewater
  • gray water
  • captured rainwater & stormwater
  • swimming pool backwash water
  • refrigeration system condensate & fluid cooler discharge
  • foundation drain
50
Q

Appliances and process water equipment should meet ____ requirements

A

ENERGY STAR

51
Q

Define Blowdown

A

Removal of the cooling tower’s water in order to minimize deposit of scales

52
Q

What kind of water can be used in cooling towers to reduce potable water usage?

A

Recycled non potable water

53
Q

What are the 6 subsystems LEED requires to meter for advanced metering of at least 80%?

A
  • irrigation
  • indoor plumbing fixtures & fittings
  • domestic hot water
  • boiler (annual use 100,000 Gal)
  • reclaimed water
  • other process water
54
Q

What specifies baseline flow and flush rates?

A

EPA act 1992

55
Q

What does the EPAct 1992 do?

A

Specifies baseline flow & flush rates

56
Q

What is rainwater harvesting?

A

Collects & filters rainwater to be reused as an alternative to potable water

57
Q

In some states, water that has come into contact with dishwashers & kitchen sinks is considered ____

A

Black water

58
Q

Installing sub meters can reduce overall building water use consumption by what amount in the first few months?

A

30-40%

LEED GA (12 decks)

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