affordable green basics and selected lessons learned christine bruncati, r.a. new jersey institute...
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Affordable Green Affordable Green Basics and SelectedBasics and Selected
Lessons LearnedLessons Learned
Christine Bruncati, R.A.Christine Bruncati, R.A.New Jersey Institute of TechnologyNew Jersey Institute of Technology
Center for Architecture and Building Science ResearchCenter for Architecture and Building Science Research
Affordable GreenAffordable Green
Use an integrated design processUse an integrated design process Make it energy efficientMake it energy efficient Make it durableMake it durable Plan for improved indoor air qualityPlan for improved indoor air quality Make it resource efficientMake it resource efficient Use environmentally responsible materialsUse environmentally responsible materials Follow through in the fieldFollow through in the field Educate residentsEducate residents
Energy BasicsEnergy Basics
Reduce loads FIRST Reduce loads FIRST – Orient for passive solar heating/coolingOrient for passive solar heating/cooling– Provide a well insulated envelopeProvide a well insulated envelope– ““Build tight ventilate right”Build tight ventilate right”
Next, meet loads efficientlyNext, meet loads efficiently– Use efficient properly sized systems Use efficient properly sized systems
THEN meet loads renewablyTHEN meet loads renewably
Long axis east-west
– Shade from high summer sun
– Admit low winter sun
Building OrientationBuilding Orientation
Building Envelope Building Envelope Insulation – money well spentInsulation – money well spent Minimize thermal bridging Minimize thermal bridging
– steel framing – ORNL study steel stud wall with steel framing – ORNL study steel stud wall with R-11 batts, whole wall R-6.1R-11 batts, whole wall R-6.1
– slab edges slab edges – masonry masonry – metal window and door framesmetal window and door frames
Air sealing – if it’s not tight, it’s not energy Air sealing – if it’s not tight, it’s not energy efficient efficient
Energy Star windows Energy Star windows – (energystar.gov, nfrc.org)(energystar.gov, nfrc.org)
Lighting, Appliances & EquipmentLighting, Appliances & Equipment
Energy Star lighting and appliancesEnergy Star lighting and appliances Energy Star or high efficiency HVAC, Energy Star or high efficiency HVAC,
properly sizedproperly sized– Manual J for residential loadsManual J for residential loads– ASHRAE or manufacturer’s software for ASHRAE or manufacturer’s software for
“commercial” loads“commercial” loads
DurableDurable
Use durable materialsUse durable materials Air sealingAir sealing Control waterControl water
– Rainwater controlRainwater control– Groundwater controlGroundwater control– PlumingPluming
From “Read This Before From “Read This Before
You Design Build or Renovate”You Design Build or Renovate”http://www.eere.energy.gov/buildings/building_america/pdfs/db/32114.pdfhttp://www.eere.energy.gov/buildings/building_america/pdfs/db/32114.pdf
IAQIAQ
Source controlSource control– Low offgassing materialsLow offgassing materials– Air sealingAir sealing– Moisture control and Moisture control and
material selection in wet material selection in wet areas i.e. use cement areas i.e. use cement board, not “green” boardboard, not “green” board
VentilationVentilation– Designed and controlledDesigned and controlled
Resource EfficiencyResource Efficiency
Reduce materials usedReduce materials used– OVE framing, panelized OVE framing, panelized
constructionconstruction– Designing on 2’ gridDesigning on 2’ grid
Recycle or salvage C&D Recycle or salvage C&D debrisdebris
Use durable materialsUse durable materials
Builder’s Guides www.eeba.org
Lessons Learned Lessons Learned
Missed insulation Missed insulation – Tub/shower Tub/shower
installed before installed before insulation - and insulation - and often on outside often on outside wall.wall.
Lessons Learned Lessons Learned
Air sealing Air sealing – Visual Visual
inspections ofteninspections often– Blower door test Blower door test
while you can while you can still correct still correct problemsproblems
Lessons LearnedLessons Learned
Ventilation Ventilation Systems Systems Specify rigid ductSpecify rigid duct– Verify fans are Verify fans are
workingworking
Lessons LearnedLessons Learned
Vegetated swales for Vegetated swales for stormwater management stormwater management – No heavy equipment or No heavy equipment or
materials on vegetated materials on vegetated swales swales
– If soils are compacted If soils are compacted infiltration wont occurinfiltration wont occur
– Diligence in the field is keyDiligence in the field is keyHigh Point Seattle, WA
Lessons LearnedLessons Learned
Linoleum flooring Linoleum flooring – Tile linoleum has a grain, Tile linoleum has a grain,
rotate each tile 90° or you rotate each tile 90° or you can get buckling. can get buckling.
PET carpetPET carpet– Investigate warrantee and Investigate warrantee and
wear issues. Some are wear issues. Some are less durable than others.less durable than others.
Lessons LearnedLessons Learned
Passive Solar Passive Solar Design Design – Residents can Residents can
undermine undermine design intent if design intent if not engaged in not engaged in process process
Lessons LearnedLessons Learned
Hold a Hold a preconstruction preconstruction meeting meeting – Everyone that will Everyone that will
actually be building actually be building the project should the project should attendattend
– Review the goals Review the goals objective objective andand accountability accountability measures. measures.
Affordable Green Case StudiesAffordable Green Case Studieswww.designadvisor.orgwww.designadvisor.org