DecisionMaking Matrix Maintainability

1

• Decision-Making Matrix Maintainability

2

• Decision-Making Matrix Constructability,
  Efficiency, Electrical, Tenants

3

• Decision-Making Matrix Risks, Costs

4
Greenbrook Sustainability in Action

• Decision-Making Matrix Understanding the Results
• Analysis concluded that the Air-Source Heat Pump
  was the system to choose
• This defined the final project scope for Detailed
  Design Development

5
Greenbrook Sustainability in Action

• New Plan
• Building Envelope Remediation
• Addition of exterior spray foam insulation to
  wall system
• Addition of insulation to foundation walls during
  Perimeter Drainage project
• Addition of attic insulation
• Installation of new vinyl-framed, double glazed,
  low e, argon-filled windows
• Installation of heat recovery ventilator and air
  tightness sealing
• New roofing system

6
Greenbrook Sustainability in Action

• New Plan
• - Mechanical Systems
• Air Source Heat Pump located outside
• Combination fan coil/HRV unit with electric
  back-up located in basement of units
• High-efficiency electric domestic hot water
  heater
• Installation of water conserving fixtures (shower
  heads, faucets, water closets)

7
Greenbrook Sustainability in Action

• New Plan
• - Electrical Systems
• Electrical upgrades required
• Options were selected to minimize required
  upgrades
• Installation of new energy-efficient lighting
  fixtures and relamping of existing fixtures to
  compact-fluorescents
• Photovoltaic system to be installed to offset the
  remaining 36 tonnes of GHG emissions of the
  retrofitted site

8
Greenbrook Sustainability in Action

• Estimated Saving 550 tonnes of GHG Emissions
  Annually

9
Conclusion
10
Healthy Housing Existing Buildings

• Mike Pistrin
• Director, Capital Asset Management
• January 4th, 2008

Housing Matters