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Green Plumbing and Mechanical Code Supplement
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Doug Kirk IAPMO Director of Green Plumbing Curriculum
• Uniform Codes - developed with critical eye on sustainability
• 2007- IAPMO Board calls for a reduction in energy and water consumption in the Uniform Plumbing and Mechanical Codes.
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IAPMO Green
IAPMO Green
• IAPMO Board creates two committees to accomplish goals – Committee for the Awareness and
Understanding of a Sustainable Environment (CAUSE)
– Green Technical Committee (GTC)
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• Buildings profound impact on environment, economy, health, and productivity. – In the United States alone, buildings account for:
• 65% of electricity consumption, • 36% of energy use, • 30% of waste output, • 12% of potable water consumption.
• Water constraints – Drought – Infrastructure – Shortage
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Driving Forces
SD
MO
NE
KS
AL SC
NC
MI WI
KY
VT NH
MD DE NJ CT RI MA
TX
WY
CA
MT
NM
IL IA
CO
OR NY
LA
PA
ND
UT
MN ID
OH
AZ
NV
OK
WA
GA
FL
AR MS
TN VA
IN
ME
WV
Source: GAO analysis of state water managers’ responses to GAO survey
Statewide (2) Regional (16) Local (18) None (9) No response or uncertain (5)
Extent of state shortages likely over the next decade under average water conditions White & light gray states expect some shortages
AK
HI
• Anticipated Water Shortages - US EPA estimates that 38 States will experience non-drought related water shortages by the year 2015
Driving Forces
Driving Forces
Reprinted with the permission of The National Drought Mitigation Center
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Driving Forces
Green Technical Committee (GTC)
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Comprised of a diverse, 25 member group of experts in Green plumbing and mechanical fields • Inspectors, plumbers, mechanics, contractors,
engineers, manufacturers, trade associations and energy and water conservation authorities.
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Green Technical Committee (GTC)
• 8 task groups (85 people in total) – Plumbing Fixtures and Fittings – HVACR – Hot Water Systems – Water Pipe Sizing* – Alternate Water Sources – Nonpotable – Potable Rainwater Catchment Systems – Commissioning and Verification – General/Administration
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Green Technical Committee (GTC)
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GTC Objectives
• Develop Green Plumbing and Mechanical Code Supplement
• Identify opportunities to make Uniform Codes more sustainable.
Green Plumbing and Mechanical Code Supplement
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GPMCS Having Immediate Impact • Serves as the basis of:
– City of Los Angeles water conservation ordinance
– Georgia Senate Bill 370, a comprehensive water conservation law
– Chicago Metropolitan Agency for Planning (CMAP) Model Water Conservation Ordinance
– City of Houston Plumbing Code
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What is the Green Supplement?
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• Turnkey document – IAPMO philosophy
– Covers all aspects of sustainability related to:
– Residential and commercial sustainable plumbing and mechanical systems
What is the Green Supplement?
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• Regulatory framework written in code language – elevate sustainable construction practices – maintain IAPMO’s high standards for protecting
public health, safety and welfare.
• Minimum baseline for sustainability
• Repository for provisions that can be integrated into ANY code.
What is the Green Supplement?
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• Most comprehensive document ever created regarding residential and commercial sustainable plumbing and mechanical systems.
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• Designed to work with (or supplement) any and all plumbing and mechanical codes in use today
• Designed with green building rating schemes in mind
What is the Green Supplement?
Why the Need?
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Why the Need?
• Nothing focusing solely on plumbing and mechanical systems.
• Nothing covering all aspects of sustainable construction for RESIDENTIAL and COMMERCIAL SYSTEMS.
• Key stakeholders never brought together to properly vet sustainable plumbing and mechanical construction practices.
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What It Covers
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What it Covers?
• Water and energy efficiency • Alternate water source use • Indoor environmental quality • Installer qualifications
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Water Efficiency and Conservation
• 20% + more efficient than UPC • Coverage areas:
– High efficiency plumbing fittings, fixtures and appliances.
– Water softening equipment – Boiler makeup water – Occupancy specific provision in restaurants
and medical facilities – Cooling towers and evaporative coolers
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• Reliance on EPA WaterSense Specifications
– Products must be 3rd party certified
High Efficiency Plumbing Fixtures and Fittings
Consistent with several State Green initiatives
• Texas, California, Georgia • 1.28 gpf toilets except for flushometer
valves • 0.5 gpf urinals • Effective dates:
Vary state to state but some are in force now and others are in transition. All by 2014
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• 1.28 gpf max toilets – Gravity – Pressure assist – Dual flush
• 1.6 gpf max flushometer valve
High Efficiency Plumbing Fixtures and Fittings
www.map-testing.com
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High Efficiency Plumbing Fixtures and Fittings
• 0.5 gpf or less urinals (HEU’s) – Nonwater using urinals
• Supply line rough-in at minimum height for backflow prevention device
• Shut off to isolate dead end • 1 water-supplied fixture upstream
(on drain).
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Lavatory faucets
• Residential -1.5 gpm
• Commercial – – 0.5 gpm – 0.25 gallons per
metering cycle
High Efficiency Plumbing Fixtures and Fittings
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High Efficiency Plumbing Fixtures and Fittings
• 2.0 gpm max showerheads
• Auto compensating valve rated at flow rate of showerhead
• Tub diverter leakage ≤ 0.1 gpm
Multiple Showerheads in a Compartment
• 2.0 gpm max per 1,800 sq. in.
• No limit on number of outlets
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Pre-Rinse Spray Valves
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• Maximum flow rate of 1.6 gpm
• Auto shut off • Typical valves-
– consume 2/3 of water used in a restaurant
– exceed 3.0 gpm – operate for 5+ hrs
Submeters • Required in commercial applications
– Landscape irrigation systems – High water-using processes – Tenant spaces – Makeup water to cooling towers,
evaporative condensers, large boiler – Means of communicating data to
consumer • Behavior modification and system
monitoring 33
Maximum Water Pressure
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• 60 psi maximum • Less water loss due to leakage • Less consumption • Less wear and tear on mechanical
components
Water Softeners and Water Treatment Systems • Timer regeneration
prohibited – Demand initiation regeneration
• Auto shut off for RO discharge
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Alternate Water Sources
• Comprehensive provisions addressing
– Rainwater harvesting (nonpotable and potable) –
– Reclaimed/Recycled water –
– Gray water
– On-site treated nonpotable water systems.
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It is a complex world of changing habits, regulations and expectations. For some, green thinking constitutes an unwelcome distraction, an intrusion into the normal course of business, but they couldn’t be more wrong. Increasingly, “business as usual” means green business.
Companies that embrace sustainable practices are finding that green business is not just a better way of doing business, it is a gateway to new opportunities that could help them survive in today’s tougher markets. – From an article entitled Think Green
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Business Opportunities
Conservation minded customers
New technologies create repeat business
Water Audits (rebates from utilities?)
Opportunities with hospitals and hotels/motels if shown ROI
Show projected dollars savings
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Calculating Water Savings Toilet Water Use
Number of Persons x Flushes per Day x GPF x Days per Year
3 People x 6 Flushes per Day x 5 GPF x 365 = 32,850 Gallons
3 People x 6 Flushes per Day x 19 Lpf x 365 = 124,350 Liters
3 People x 6 Flushes per Day x 1.28 GPF x 365 = 8,410 Gallons
3 People x 6 Flushes per Day x 4.8 Lpf x 365 = 31,835 Liters
Savings Achieved by switching to an HET = 24,440 gallons (92,515 liters) per year!
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Shower Water Use
Number of persons x min per day x GPM x days per year
3 People x 10 min per day x 4 GPM x 365 = 43,800 gallons 3 People x 10 min per day x 15 Lpm x 365 = 165,800 Liters
3 People x 10 min per day x 1.6 GPM x 365 =17,520 gallons 3 People x 10 min per day x 4.8 Lpm x 365 = 66,320 Liters
Savings achieved by with a high-efficiency showerhead = 26,280 gallons (99,480Liters) per year!
Calculating Water Savings
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Washing Machine Use
Number of loads per year x 2.77 cu ft x 13.3 gallons per cu ft
392 loads x 2.77 cu ft x 13.3 gallons per cu ft = 14,442 gallons 392 loads x .078M3 x 50 liters per .078 M3 = 54,670 liters
392 loads x 2.77 cu ft x 4.5 gallons per cu ft = 4,886 gallons 392 loads x .078M3 x 17 liters per .078 M3 = 18,495 liters
Savings achieved by with a high-efficiency washing machine = 9,556 gal (36,175 liters) per year!
Calculating Water Savings
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Calculating Water & Sewer Savings Sewer Rate = $7.75 per CCF (1 CCF = 748.052) Gallons
Water Rate = $3.36 per CCF
Combined Water & Sewer = $11.11 / ccf
24,440 saving from water closets
26,280 saving from showers
9,556 saving from washing machine
60,276 gallons saved/ 748.052 = 80.58 ccf
80.58 ccf x 11.11 / ccf = $895.24 saved
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Calculating Energy Savings (Natural Gas)
26,280 gal saved from showers
4,778 gal saved from washing machine (9556 gals / 2)
31,058 gallons heated water saved
31,058 x 8.35 lbs = 259,334 lb
259,334 lbs x 55°f =14,263,386 btu
14,263,386 btu /100,000 =142.63 therms
142.63 therms x 1.27 / therm = $181.14
181.14 / .56 (heater efficiency) = $323.46
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26,280 gal saved from showers
4,778 gal saved from washing machine (9556 gals / 2)
31,058 gallons heated water saved
31,058 x 8.35 lbs = 259,334 lb
259,334 lbs x 55°f =14,263,386 btu
14,263,386 / 3412 = 4,180.36 kWh
4,180.36 x .079 / kWh = $ 333.25
$333.25 / .9 (heater efficiency) = $366.94
Calculating Energy Savings (Electricity)
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Calculating Water, Sewer & Energy Savings (NG)
60,276 gallons saved/ 748.052 = 80.58 ccf
80.58 ccf x 11.11 / ccf = $895.24 saved
142.63 therms x 1.27 / therm = $181.04
176.86 / .56 (heater efficiency) = $323.46
$895.24 + 323.76 = Savings
per year at current rates
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Calculating Water, Sewer & Energy Savings (elect.)
60,276 gallons saved/ 748.052 = 80.58 ccf
80.58 ccf x 11.11 / ccf = $895.24 saved
4,180.36 x .079 / kWh = $ 330.25
$330.25 / .9 (heater efficiency) = $366.94
$895.24 + 366.94 = Savings
per year at current rates
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