Download - Residential Green Building Rating Systems
Residential Green Building Rating Systems
Session 1 Part B
How the HSA worksRegional• Neutral Zone:
– 2,300 to 2,800 gsf conditioned• Adjusts the achieved point total
– Add 1 point for every 200 gsf < 2,300
– Deduct 1 point for every 200 gsf > 2,800
• Spreadsheet automatically calculates the HSA
LEED• Neutral Zone:
– gsf conditioned space +…– 2 Bedroom = 1,400– 3 Bedroom = 1,900– 4 Bedroom = 2,600
• Adjusts the award threshold with a logarithmic formula…– 3 bedroom 2,800 gsf +10– 4 Bedroom 2,800 gsf +2
• Let the spreadsheet do it!
NAHB: Neutral Zone: 2,501 to 3,999-Add 6 points to point total for < 2,500; Add 9 points for
< 2,000, etc- > 3,999 Adjust threshold up by one point
LEED: Integrated Design• How to accomplish a certified green home for less• LEED ID 1.2 Integrated project team, in addition to Builder include at
least three members with the following skill sets– Architect/Designer– Mechanical or energy engineering– Building science – Green building or Sustainable design– Civil/landscape
• At least monthly working meetings• Design the House as in integrated system
– Advanced framing: • Materials cost savings of about $500 or $1000 • 30% better insulation
– Or, high thermal mass wall with exterior insulation: No termite problems, local material
– Better windows– AC approx $450 per ½ ton
• LEED ID 1.4 Design Charrette 1-8 hour or 2-4 hour sessions
LEED: Durability Management
• Durability Planning– Risk Evaluation– Develop Measures to respond to risks, and…– The Mandatory Measures =
• Nonpaper-faced backer board• Water resistant flooring at kitchen, bath, laundry and entry• Water heater drain pan• Clothes washer drain pan or single throw valve
• Durability Management– Install the measures
• Third Party Verification (3 points)
Durability Guidelines
Durability Guidelines
The Credits
Regional• *
LEED• *
NAHB: ***
Accountability Form
NPPO
Regional• NPPO is Required, if...• It is required
LEED• SS 2.1 No Invasive plants
NAHB: 503.1.1 Natural Resource Inventory
Accountability Form
Invasive Plants
http://www.governor.state.az.us/AIS/Documents/AISMP2008.pdf
• Ordinance– Olive Trees– Mulberry– Bermuda Grass
• Sonoran Desert Conservation Plan:– Salt Cedar or Tamarisk– Giant Reed– Bermuda Grass– Fountain Grass
http://www.pima.gov/CMO/SDCP/reports%5Cd26%5C136INVSP.PDF
Invasive Plants
Site Selection
Regional• 1.1 a Outside CLS• 1.1.b Downtown Infill Incentive
District• 1.2.a Exceed open space
requirement by 50%• 1.2.b Develop at density of 75%
of max• 1.2.c Develop at density of 100%
of max
LEED• LL 2 Site Selection
– Not in 100 year floodplain– Not endangered species habitat– Not within 100 feet of wetlands– Not public park land– Not prime soils, unique soils, or
soils of state significance (farmland)
NAHB: 501.1.2 Lot Selection: Select a greyfield (previously developed) or EPA brownfield
Prime Farmland
• Web Site: http://websoilsurvey.nrcs.usda.gov/app/
ohmygod!
How to Navigate the Soils Site
LL 2.e How to Check Soils Identification go to: http://websoilsurvey.nrcs.usda.gov/app/ Click on the green button “Start WSS” On the left side, under “Navigate by…”, click on Address (If you don’t have an address see below) Enter Address, click view Set AOI (Area of Interest) with the rectangle tool in map tool bar Select Soil Data Explorer from top tab Select Suitabilities and Limitation for Use from second line of tabs (usually the default selection) On left, select land classification select Farmland classification at the bottom right of the Farmland Classification popup, click view rating At the upper right, click Add to shopping cart On the upper tab line click “Shopping Cart (Free)” click on checkout at upper right If No Address: To find the latitude and longitude of the property go to Pima County Mapguide Navigate to your property Under “-Map Tools & Map Info.-“, select Draw Point, click on Draw Point Click on property Select the point, so that it is highlighted Under “-Map Tools & Map Info.-“, select Get lat/Lon Copy these numbers down to input into the soil database above
Previously Developed
Regional• 1.3 75% of site was previously
developed– Not including farms, parks or
athletic fields– Older than 5 years
LEED• LL 3.3 75% of site was previously
developed– Preexisting paving, construction
or altered landscapes– Agricultural use, forestry use or
preserved natural area do not count
– Older than 5 years
NAHB: 501.1.2 Lot Selection: Select a greyfield (previously developed) or EPA brownfield
Previously Developed
• Pima County DOT MapGuide is your friend!
Infill/Edge
Regional• 1.4 Infill Site
– 50% of the site borders previous development
LEED• LL 3.1 Edge Development
– 25% of the site borders previous development
• LL 3.2 Infill– 75% of the site borders previous
development
NAHB: 501.1.1 Infill Lot –sites that are vacant or underutilized land, served by at least two existing physical installations: roads, electrical power, sewer, or water.
Infill/Edge
• Who’s your friend?
Community ServicesRegional• 1.5 within ¼ mile radius of bus
stop, shared use path or bike route
• 1.6.a within ¼ mile of 4 community services
• 1.6 b within ½ mile of 8 community services
LEED• LL 5 Community
Resources/Transit
– Walking route, not radius– From center of community (unless home is
more than ¼ mile from center)– Only 2 of each type count, 2 schools, etc
NAHB: 501.2.1 Access to Mass Transit: ½ mile radius to bus stop501.2.2 Sidewalks501.2.3 ½ mile of 6 community resources
Meet one of the following…
Within ¼ mile of # community services
Within ½ mile of # community services
Within ½ of transit Services that offer ## rides/weekday:
5.1 Basic 4 7 30
5.2 Extensive 7 11 60
5.3 Outstanding 11 14 125
Community Services
• Google Maps
Community Services
• Walkscore.com
Location and Linkages
Walkscore.com
Community Services
• Who’s your friend?
Right Click over the map
to get a measuring
tool
Existing Infrastructure
Regional• 1.7 Existing sewer and water
– Develop on a lot with existing municipal sewer and water service
LEED• LL 4 Existing Infrastructure
– Within ½ mile of water service and sewer service (from center of development)
NAHB: 501.1.1 Infill Lot –sites that are vacant or underutilized land, served by at least two existing physical installations: roads, electrical power, sewer, or water.
Common Space O&M
Regional• 1.8 O&M Manual for common
open space, retention, wildlife corridors, etc
LEED
NAHB:
Neighborhood Development
Regional• 1.9 credit for
– LEED ND– Enterprise Green Community– PAD like Civano
LEED• LL 1 LEED for Neighborhood
Development – Performance path
NAHB: Chapter 4: Site Design and Development. Not part of the scoring tool for an individual project
Questions