Green Plumbing Codes and Standards Panel

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Green Plumbing Codes and Standards Panel

• ASHRAE 189.1 Standard for the Design of High
  Performance Buildings Except Low Rise Residential
  Buildings
• ASHRAE 191 Standard for the Efficient Use of
  Water in Building, Site and Mechanical Systems

Thomas Pape pape.thomas_at_gmail.com
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ASHRAE 189.1

• ANSI consensus process
• First serious effort combining both water and
  energy conservation
• Not for low-rise residential
• More emphasis on energy than water
• Popular alternative to LEED
• Engineer specification, not code
• Reciprocal equivalency to IgCC

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ASHRAE SPPC 191

• Water Efficiency Only Code
• Under Development 1st Public review conducted
• 1st Draft written with misunderstood direction
  (me included)
• Needs major revision to be the intended base code
  under 189.1 (like 90.1 is for energy efficiency)
• Future uncertain

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189.1 Landscape

• Requires 60 bio-diverse planting of native and
  adapted plants other than turfgrass
• There is no consensus definition of adapted
  plants
• Is 40 turf restriction reasonable for all
  climate zones?

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189.1 Irrigation System

• Hydrozoning to match plants needs
• Smart controllers only (IA SWAT)
• Minimal landscape/system design requirements
• Irrigation water efficiency affected by other
  sections site design, and heat island
  mitigation (wet roofs)

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189.1 Water Closets

• 1.28 GPF
• Dual flush controversy
• Water Sense (if tank type)
• Revise to include WS flushometer
• No exception for remote toilets

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189.1 Urinals

• O.5 GFP maximum requirement

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189.1 Public Lavatory Faucets

• 0.5 GPM maximum
• Self-closing limited to 0.25 gallons per cycle

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189.1 Residential Faucets

• Bathroom 1.5 GPM maximum
• Kitchen 2.2 GPM maximum
• Proposed 1.8 GPM with temporary override to 2.2
  GPM

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189.1 Showers

• Residential 2.0 GPM maximum
• Requires at least 2600 inch2 of shower stall
  floor area per showerer
• Based on the presumption that law abiding
  citizens ought to get twice the shower space of
  axe murderers.

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189.1 Clothes Washers

• Energy Star required
• Residential 6.0 maximum WF
• Proposal to meet new ES requirements
• Coin-op and public access 7.5 WF

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189.1 Dishwashers

• Energy Star required
• 5.8 gallon maximum per full operating cycle
• Does it really matter?

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189.1 Single-pass Cooling

• Prohibited
• What is returned to same source?

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189.1 Cooling Towers

• Make-up Meters
• Blow-down meters (?)
• Conductivity meters
• Overflow alarms
• Drift lt 0.002 (0.005 crossflow)

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189.1 Condensate Recovery

• Required where
• 1 design condition gt or 72F
• gt 65,000 Btu/h

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189.1 Wet Roofs

• Potable water use prohibited
• Reclaimed water prohibition proposed
• Currently no water efficient design criteria
• The cooling effect of wet roofs is not magic its
  latent heat of evaporation of water

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189.1 Metered Water Use

• That which is measured, is improved
• Hawthorne Effect

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189.1 Prescriptive Option for Irrigation

• Non-potable on golf courses
• lt 33 potable water for irrigation

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189.1 Prescriptive OptionCooling Towers

• A. Make-up water lt 200ppm at least 5 COC
• B. Make-up water gt 200ppm at least 3.5 COC
• Exception silica gt 150 ppm

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189.1 Prescriptive Medical Lab Facilities

• Only use tempering water when discharge exceeds
  140F
• Use digital x-ray and photo equipment
• Dry hood scrubbers
• Dry vacuum pumps

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189.1 Water Features

• Reclaimed water for fountains
• Make-up water meters
• Leak detection devices
• Splash trough drain into pool

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189.1 Performance Option

• Calculations shall be done using accepted
  engineering standards
• Irrigation
• Potable water at 35 of ET
• Total water demand based on Et
• Indoor
• Equal to or less than prescriptive path

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Future ASHRAE 189.1

• Addendum V out for 2nd Public Review to fix and
  update the Standard
• Standard 189.1 needs to catch-up with other green
  codes