Project Specs

Location: Duncan, British Columbia
Climate Zone: Cool-Temperate
Building Type: Single Family Residential
Project Phase: Certified
Certification Type: Passive House Classic
Year of Construction: 2019
Gross Floor Area (m2): 535.5
Treated Floor Area (m2): 312
PHPP Verification: Download

Project Description

Beautiful Passive House in the Cowichan Valley, British Columbia designed by Ecocentric Design, designer Hajo Meijer and built by Somenos Construction.

The Maple Bay Passive House is a 4 bed room home with an in-law suite and a detached carport on the slopes of Maple Mountain. Targeting PH Plus certification, it incorporates a 12 kW PV solar array and a Sanden HP. The many evergreen trees surrounding the site proved to be a challenge for solar ingress, resulting in a building with thick layers of insulation. Rain water will be harvested for garden irrigation and materials used are mostly natural and carbon sequestering:
– wood structure
– rockwool and cellulose insulation
– concrete foundation with graphite infused EPS below grade only
– metal and wood cladding
– metal roofing

Thermal Envelope

Exterior Wall: Drywall; 2x4 stud service fibreglass; plywood sheathing; TJI 110 w/ dense pack cellulose; Rockwool comfort board: U-value = 0.095 W/m2K
Basement Floor/Floor Slab: Concrete slab; Heat-sheet EPS tube locks; Heat-sheet EPS; Terrafoam platinum GPS Type 2: U-value = 0.113 W/m2K
Roof: T&G; 2x6 stud cavity Air; Parallel Cord Trusses w/ Dense pack cellulose; Plywood sheathing: U-value = 0.086 W/m2K
Window: Cascadia Windows & Doors, Universal Series PH

Mechanical System

Ventilation: Zehnder Q450, 88% effective heat recovery efficiency
Heating/Cooling: In-floor hydronic loop from DHW
Domestic Hot Water: Sanden heat pump