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New Home Green Building Construction Standards
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Transcript of New Home Green Building Construction Standards
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New Home Green Building Construction Standards
A look into the futureof home construction
It’s available today
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Working group
Matt Brazil HERS RaterSteve Vollstedt HERS Rater / CertifierJane Whitmire HERS Rater / Certifier
Stephen Onstad HERS RaterTeri Buhl HERS Rater
Bill Roth Builder / HERS RaterSteve Hale Builder / Program Director
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What is Build Green NM• Operates under the Foundation for Living (Formerly
Foundation for Building) a 501 c 3 non profit• Provides 3rd party certification of High Performance Homes• We have certified about 4070 homes in the State of NM
• Local administration of program for the State of NM• Education for Builders, Homeowners and affiliated industries• Program for both New and Existing homes• Educate consumers to encourage wise purchasing decisions in
home buying and remodeling • Advocate for voluntary High Performance Standards
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Program Base
2009 National Green Building Standard ICC - 700
2010 ASHRAE 62.2
2015 ICC IECC
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2014 Revision Accomplishments• Narrowed the breadth of the program (eliminated
most of the subjective practices, hard to verify (timing) not relevant to the southwest)• Raised the Bar for Energy and Water• Developed a WERS Index for indoor water use• Focus on Ventilation in IAQ• Reduced the paperwork which reduced costs
associated with certification• More marketing and consumer friendly certificate
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Green Building is a look into the future of codes…available todayBGNM Certified Gold Level HERS 49 before PV HERS 22 With PV WERS 58
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Raise the Bar for Energy• Bronze LevelHERS 65
• Silver Level HERS 58
• Gold Level HERS 51-55 (based on CZ)
• Emerald Level 20% below Gold Level
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Raise the Bar for Water EfficiencyPerformance Path
INDOOR WATER USE• NEW! WERS Index• Compares Water
Fixtures and Water using appliances
• Installed vs. Industry Baseline
• WERS maximum is 86
Indoor Water
Savings 35%
65
WERS
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About Hot Water Waste• 1.5 gallons of water wasted to get Hot Water to fixture used as
baseline. If you beat the base line with a non recirculation system you will lower your WERS Index
But• If you have a recirculation System it must be “On Demand”
to get points for this practice. (Push button or motion sensor)• Timer No Points• Constant on No Points• Aquastat No Points• “Smart” controller No Points
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IAQ
Tight Homes need proper ventilation• Whole building ventilation is Mandatory if the
home has 5 ACH 50 or less.• Bathroom fans to be vented and tested for 50
cfm intermittent or 20 cfm continuous Mandatory.• Radon Mitigation still Mandatory in Zone 1.• A short list of Builder Verified indoor materials
with low or no VOC or other hazardous components.
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Sustainable Practices• Landscape components• Infill lot better defined• Wildlife habitat• Owner’s manual (1/2 of the material supplied by BGNM)• Builder provides location of all shutoffs and Maintenance
Requirements to get the most of their green home• Durability Practices• Use of recycled content, Certified wood products and
engineered products are given point value.• Universal Design practices• Home Size matters…
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Home Size Matters• Larger homes lose points based on # of bedrooms
• Smaller homes Gain points based on # of Bedrooms
1 extra point is required for each 300 sq. ft. or fraction there of over benchmark home size. (enter as a negative)
Not intended as social engineering but to bring energy and other use (footprint) of home nearer to the average
# of Bedrooms 1 2 3 4 5
Size of Home 1000 1600 2200 2800 3400
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Mandatory Practices
•Energy 9•Water 1• IAQ 11•Sustainability 4
Total 25
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Threshold for different levelsBronze HERS 65 or lower and meet all mandatory practices. No Extra points requiredSilver • Energy; HERS Index of 58• Water; WERS Index of 80 or lower• Additional Points in any category
Gold• Energy; HERS Index based on Climate Zone 51 to 55• Water; WERS 75 or lower • Additional Points in any category
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… and for Emerald
Think “Show Home” Indoors and out1. Renewable Energy production to lower HERS
Index 20% below Gold Level2. Water Catchment or reuse storage of at least
XXX Gallons3. Landscape to showcase appropriate Xeric
planting and irrigation even if not fully completed and evidence that turf is < 10% of landscape area.
4. Additional points in any category