Sundance Housing Co-op deep energy retrofit

The Sundance Housing Cooperative has been a leader in affordable housing, community living and environmental responsibility for more than 40 years. Now, Sundance is leading the largest panelized Deep Energy Retrofit ever undertaken in Canada.

Image of pre-fabricated, fully-finished wall being hoisted into place.
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Image of pre-fabricated, fully-finished wall being hoisted into place.
Two finished Sundance units
underconstruction exterior wall
Two Sundance buildings during/before the retrofit
Two Sundance building after the retrofit
Nearly complete retrofit
Pre-fabricated walls prior to installation
Exterior prepped to receive new walls
Crane preparing to move new panel into place
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Edmonton, AB

This retrofit reduces the energy needs of Sundance Housing's buildings by 70-80%, and eliminates the need for gas lines. The Co-op is installing solar panels that will produce more than 75% of the remaining energy demand. The balance will be purchased from off-site renewable sources.

Before

After

Comfort
Dry, some units with cold spots, not airtight Cosy and fresh with healthy humidity
Building condition
Solid, but with substantial exterior work needed in the near future Modern new look with minimal maintenance needed for many years
Renewables
None Offsite renewable power and rooftop solar
Wall insulation
2x6 16’OC with nominal R20 fibreglass - ~R15 effective R 41 - Original wall plus new panel - with 8” of dense cellulose
Ceiling insulation
R 28 Cellulose R 78 - Original R28 plus R50 in new scissor trusses
Foundation insulation
Partial (top 4’) R10 (nominal) frost wall Upper 2’ - R30 panel support box beam plus original R8 (effective) frost wall. Lower 6’6” - 5” of R 25 NeoporEPS
Windows
~ R3 (COG) PVC frames dual glazed Fibreglass frames with R 8.6 triple glazing: ~R5 effective
Ventilation
None Lifebreath 267 MAX Heat Recovery Ventilators: 80% efficient with ultra-efficient motors
Heating
Mid- and high-efficiency gas furnaces Daikin cold climate air source high-efficiency electric heat pump
Cooling
None Daikin cold climate air source high-efficiency electric heat pump
Hot Water
Gas hot water tank AO Smith Air Source Heat Pump water heater

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