one planet reno presentation
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TRANSCRIPT
ONE PLANET RENO
BuildGreen Solutions
Real Estate Development• Urban infill, sustainable
communities
BuildGreen Solutions• Innovative sustainability
consulting• Green Development
Management
Micro-Utility Development• On-site renewables-
based micro-utilities• Wastewater and energy
Sample Projects – Dockside Green
• North America`s highest ever LEED score
• Greenhouse gas neutral (waste biomass plant)
• On-site wastewater treatment
• Clinton Climate Positive development
Sample Projects – The Currents
• LEED Platinum Certified• Highly visible solar wall
application• Strawboard cabinets,
bamboo flooring• Becoming a hub for the
arts in Ottawa
Oxfam – LEED Gold CI
Why Care About Green Building Retrofits…
IMPACT OF BUILDINGS IN CANADA 30% of Canada’s energy
production
50% of extracted natural
resources
30% of our landfill waste
10% of airborne particulates
TO
Zero CarbonZero Waste
Sustainable TransportSustainable Materials
Local & Sustainable FoodSustainable Water
Land & WildlifeCulture & Heritage
Equity & Local EconomyHealth & Happiness
One Planet Framework
1 Zero Carbon
Zero Carbon:Design Principles
•Orient for Solar Gain•Passive over Active
•Super-Insulate•Glass and Mass
•Air Sealing•Heat Recovery – ERV•Solar Thermal – DHW
and Space Heat•Photovoltaic
•Bio-mass
Super-InsulatePassive House Principles
Energy Modeling
Roof: R85
Walls: R45-R66
Slab: R45- R55
Windows: Triple Glazed, Argon, selective coatings depending on exposure, R7.2 (overall)
Air Sealing: <0.6 A.C./hr
Performance – roughly 29 kWh/m2
Annual Heating Cost (electric): $422
Super Insulating Existing Wallsfrom the inside
Foam infill of existing balloon cavity
4” foil faced polyiso – V.B.
2X3 strapping for utilities
Final Roxul layer in 2X3 wall
Super Insulating New Wallsbreathing to the inside
“Membrain” interior VB
A.B. Sheathing, exterior Polyiso
Super Insulating Roofunvented, second membrane
Envelope: Lessons Learned• Residential trades
challenged by typical commercial details – cost/quality
• Spray Foam – must have a secondary air barrier if attempting to get lower than 2 ACH
• 4” of external insulation results in labour intensive window/door installation
• Infill or tight city lot – carry expense for lifts
Ball valve
3100 L storage tank
drain
Check valve
Press. gauge
DHW to Fixtures
Pump
Expansion tank
Temp control valve
Shunt load
Radiant concrete floors
in 3 zones
Pres. relief
X. tankPump
drain
Check valve
Solar Thermal Schematic
“Power Pipe” – heat recovery
Potable Water Supply
Ball valve
Check valve
Ball valve
4 panel Apricus evacuated tube collector
PAUL Novus 300 ERV
Ultra Efficient:
+20C inside -10C outside
Fresh air delivered at 17C
Passive Ventilation
Photovoltaic Array
Can’t beat Ontario’s FIT program.
Grid Tied 3.67kW system
Produce 4,549kWh
Income: $3,648/yr
Zero Carbon Math (kWh)
Demand
Thermal LoadsSpace Heat
5285
DHW 4184
Electric LoadsAppliances
3357
Pumps/HRV 390
Lights 720
Total 13,856kWh
Supply
Solar Thermal 5955
Woodstove 2355
PV Array 4549
Total12,859kWh
Grid 997kWh
Zero Carbon Math (kWh)
Demand
Thermal LoadsSpace Heat
5285
DHW 4184
Electric LoadsAppliances
3357
Pumps/HRV 390
Lights 720
Total 13,856kWh
Supply
Solar Thermal 5955
Woodstove 2355
PV Array 4549
Total12,859kWh
Grid 997kWh
Actual Results May Vary……
Zero Carbon: Latest Estimate (kWh)
Demand
Thermal LoadsSpace Heat
6700
DHW 5190
Electric LoadsAppliances
3357
Pumps/HRV 390
Lights 720
Total 16,357kWh
Supply
Solar Thermal 6428
Woodstove 2608
PV Array 4352
Total13,388kWh
Grid 2,969kWh
2 Zero Waste
90% - Building’s Mass Retained/reused
97% - Construction Waste Diverted
80% - Demolition waste diverted
20% - Salvaged materials used
Foundation and Basement
• Some wood at grade• Re-pointing• Change water flow• No new drainage• Closed Cell foam• Isolate from house• Study (HOPE)
Waste diversion challenges…
3 Sustainable Transport
copyright 2004
6 Sustainable Water 6 Sustainable Water
Rainwater Capture System
• Sewage conveyance/external hose bibs
• 10,750 litre capacity needed to carry the house through the winter
• Regulatory challenges
4 Local and Sustainable Materials
Materials chosen with low environmental impact
FSC chain of custody certified wood and salvaged wood
LEED and Living Building Challenge requirements
Reclaimed Steel and Wood
SHED
Framed with salvaged floor joists from house
Living Building Challenge
5 Local and Sustainable Food
Rooftop veggie growing…
7 Land and Wildlife
Biophilia
• Two visible green roofs• Prominent use of natural
materials• Maintaining large tree in
front yard• Asphalt to garden
• Architectural cues from historic neighbourhood – porch, open balcony, red brick
• Tours and education sessions• Contributing to a cultural shift towards true
sustainability
8 Culture and Heritage
• Social justice screen for materials choices• FSC wood• Contractor chosen in part due to
exemplary safety requirements• Local materials given strong preference
e.g. CGC drywall, local lumber• Local demolition labour instead of
machines.
9 Equity and Local Economy
• Small house with shared spaces and retreat spaces for all
• Whole house HEPA tied into HRV
• Low and zero VOC materials• The world’s most efficient
woodstove – the Hearth
10 Health and Happiness
Lessons Learned:Roadmap for a Deep Green Retrofit
• Shared Commitment to Ambitious Goals• Strong Team, Committed to IDP, must
have experienced trades at the table• Sweat the Details• Double the design/procurement time
OR double your budget• Find experienced trades who like problem
solving. • Expect site oversight to be more diligent• Contracts with subs through GC need to
be clearly defined
