Project Specs

Location: Saskatoon, Saskatchewan
Climate Zone: Cold
Building Type: Multi-Unit Residential
Project Phase: Certified
Certification Type: Passive House Plus
Year of Construction: 2017
Gross Floor Area (m2): 749
Treated Floor Area (m2): 466.5
PHPP Verification: Download

Project Description

Radiance Cohousing is a friendly, green community located in the heart of the Canadian prairies. The nine-unit townhouse development is currently under construction, with completion anticipated for winter 2018.

The project uses a cohousing (“collaborative housing”) development approach, is designed to meet Passive House building standards, and incorporates sustainable landscaping techniques. By combining cohousing with environmental design, this project will showcase what’s possible in terms of sustainable infill housing in cold-climate, urban settings.

While this project is about creating quality homes that respond to a changing climate and build community, it is also about helping pave the way for other similar housing projects, influencing policy, and encouraging our leaders to make decisions that will benefit where we live, work, and play.

Thermal Envelope

Exterior Wall: 2x6 wall with Roxul (040) batts
3/4" plywood sheathing
Proclima Intesana air and vapour barrier
280mm Gutex wood fibre insulation (037 + 039)
rainscreen strapping - 320mm Heco Topix stainless steel fasteners
fibre-cement and cedar cladding
U-value = 0.091 W/(m2K)
Basement Floor/Floor Slab: 100mm concrete
300mm EPS Type 2 (036)
U-value = 0.11 W/(m2K)
Roof: Proclima Intello Plus air and vapour barrier
32" parallel chord trusses
740mm cellulose insulation (040)
U-value = 0.053 W/(m2K)
Window: triple pane Cardinal LowE180 on surfaces 2 and 5
13mm Krypton/Argon blend gas fill
warm edge spacer

U g-value = 0.67 W/(m2K)
g -value = 56 %

Mechanical System

Ventilation: Zehnder, ComfoAir 200
5 ventilation units, eff. spcif. HRE: 82%
one ventilation unit per suite
built in electric pre-heater frost prevention
automatic summer bypass for free cooling

ERV reduces pre-heater energy, as well maintains 30%+ indoor RH in winter.
Heating/Cooling: Heating is provided by air source heat pump through a Daikin VRV IV S system. One outdoor unit per building serves refrigerant piping. Fan-coils in each suite distribute heated air through ducting. Each fan coil is provided with a 5kW electric duct heater as backup when outdoor temperatures prevent operation of the heatpump (below -20°C).
Domestic Hot Water: Domestic hot water is generated in each suite by heat pump hot water heater. Rheem Prestige PROPH50. 190 L.
Drainwater heat recovery - Powerpipe R3-60.