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high performance building

Residential (Small) Award – HEIMAKLETTUR HOUSE, Langley, BC

Jury Comment: “This small house is a great example of how doing more with less is key to sustainability. It is appropriately sited, well designed, well detailed, well crafted and thoughtful in its execution. It is notable for its modesty and simplicity, yet the interior has a generous sense of space and light.“

This house was designed for an ambitious family on a five-acre property within the Agricultural Land Reserve (ALR) in the Fraser Valley community of Langley. The clients’ initial vision for the project included the goals of living smaller and more closely to the land and ultimately growing their own food.

Heimaklettur (home rock) is named after their father’s hometown of Vestmannaeyjar in Iceland. The house form references contemporary Nordic dwellings featuring pitched roofs, lean-to additions, traditional wood framing, and contrasting cladding.

The design responds to existing site characteristics and bioclimatic conditions, such as solar orientation, shade from existing trees and the prevailing wind, while placing the building on the previously disturbed area of the site and utilizing the existing septic system.

The house respects the required 30m setback from the nearby creek and is set above the flood datum of 7.95m geodetic. A simple plan defines the overall form, articulating a “living gable” and a “sleeping gable”, and incorporating a change in level of 450mm with a children’s play attic above. The mudroom plays a key role in the plan, filtering the messy activity of everyday life on a rural property, while also differentiating the south gable form of the house. The narrow plan offers ample daylight, views and cross ventilation throughout the home.

The building enclosure is highly insulated, with triple-glazed windows in fibreglass frames and minimal thermal bridging. Heating is provided by a high efficiency HRV forced air system that maintains a ventilation rate of 1.0 air changes per hour throughout. The project achieved Step 5 of the BC Energy Step Code, and an Energuide rating of 47.

Project Credits

  • Architect  MOTIV Architects
  • General Contractor  Owner built
  • Structural Engineer  Dan Sundvick
  • Photos  Ema Peter

Project Performance

  • Mechanical energy use intensity (MEUI) = 40 kWh/m²/year
  • Thermal Energy Demand Intensity (TEDI) = 2 kWh/m²/year
  • Energy intensity reduction relative to reference building under ERS Version 16 = 47.6%

Cascadia Windows & Doors supplied its fixed and operable fibreglass windows.

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Residential (Small) Award – BIRD’S WING PASSIVHAUS DUPLEX +, Vancouver, BC

Jury Comment: “In addition to achieving Passive House performance, this duplex addresses multiple aspects of social sustainability, such as affordability, demographic diversity and ageing in place. It doubles the density in  this former single-family zone, while still respecting the form and scale of the surrounding buildings.“

Bird’s Wing Passivhaus Duplex + is a new housing typology that elegantly adjusts to the occupants’ needs for space and flexibility, without waste. The name “Bird’s Wing Passivhaus Duplex +” has several layers of meaning, describing the architecture, planning, and unique objectives of this custom duplex that includes two primary dwelling units as well as two flexible lock-off suites.

The project takes a soft density approach, with four households under its wing, yet keeping within the scale of its single-family neighbourhood. Adaptability is key, with units able to expand and contract for generational flexibility.

The project also addresses  accessibility for ageing-in-place, and affordability with its two primary and two lock off units on a previously single-family lot.

The architecture of Bird’s Wing incorporates a folding roof line, like the wing of a bird in flight. The modern and minimalist design demonstrates a shared commitment to sustainability and innovation. Located in an established neighbourhood on Vancouver’s west side, Bird’s Wing is just two blocks from an active commercial street.

With a Walkscore of 92 and Bikescore of 91 there is rarely a need to drive. However, both parking spaces are equipped with electric car chargers.

The design is rooted in nature. The result marries thermal efficiency with spatial efficiency in a perfect balance of design, space, and nature.  The four comfortable, yet compact homes are nested within what appears to be a single-family home. Each is unique, bright, and connected to the outside through large operable windows on all sides.

Consistent with Passive House goals of efficiency and simplicity to avoid wasting energy, the design also avoids wasting space or materials. Every square inch is considered, impactful, and multi-functional. The planning is a creative three-dimensional puzzle of interlocking pieces. The suites bend and fold around each other to maximize efficiency and provide evocative volumes within strict zoning regulations.

PROJECT CREDITS

  • Architect  ONE SEED Architecture + Interiors
  • Interior Design  ONE SEED Architecture + Interiors
  • Structural Engineer  Timber Engineering
  • Builder  Naikoon Contracting
  • Certified Passive House Designer  JRG
  • Building Engineering Certifier  CertiPHIers Cooperative
  • Landscape Design  Acre Horticulture
  • Photos  Janis Nicolay

Bird’s Wing brings four households together, with communal outdoor living spaces for larger gatherings. Cascadia Windows & Doors supplied the fixed and operable fibreglass windows from its Universal PH Series.

The duplex interior connects to the exterior through strategically placed openings for ample daylight and cross-ventilation. nVent NUHEAT Mats provide radiant floor heating in the bathrooms and are stocked in standard sizes or can be custom made for a perfect fit. Ideal for sustainable projects, NUHEAT systems are 100% efficient, smart home compatible, ultra-low profile, and easily installed.

The metal roofing and siding is Vicwest.

Proclima Solitex Mento Plus from 475 Supply performs the dual role of water-resistant barrier and air barrier.

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Residential (Small) Award

SoLo House, Soo Valley, BC 

Jury Comment:  “This off -grid project provides an object lesson in how to address the imperatives of carbon neutrality, energy self-sufficiency, occupant health and more efficient, low-impact construction materials and methods: in short, how to future proof our built environment. Realized in a remote area, these lessons could nonetheless be applied in urban locations.“

SoLo house is a 380 sq.m, self sufficient, off-grid home with a 40 sq.m ancillary building, sitting lightly on a forested knoll overlooking the spectacular Soo Valley north of Whistler in the Coast Mountains of British Columbia.

Reflecting the client’s expressed intention to ‘Set a new benchmark for environmental performance, health and well-being’, SoLo is not a typical alpine home.

Rather, it is a prototype that demonstrates a unique approach to building off-grid in a remote environment where every choice has consequences. Challenging conventions in both aesthetics and construction, the prototype acts as a testing ground for low-energy systems, healthy materials, prefabricated and modular construction methods, and independent operations intended to inform the approach to larger projects. 

The house includes living space and a master bedroom suite on the main level linked to a sauna and storage space in the adjacent ancillary building. The upper level includes two more bedrooms and two bathrooms.

Given the valley’s extreme climate, it was critical to have an ‘enclosure-first’ approach to ensure energy efficiency and outstanding comfort. A two-layer solution was used for the enclosure with an outer heavy timber frame acting as a shield against the weather, and the heavily insulated inner layer acting as the thermal barrier.

With the goal of eliminating fossil fuels and combustion, SoLo includes a photovoltaic array and a geo-change system, with a hydrogen fuel cell for backup energy storage. To avoid snow build up in winter, the PV array is mounted vertically on the south elevation.  In addition, the house collects and treats its own drinking water and processes its waste water.

Because of the remote location and short construction season, modular building elements were fabricated off-site by a local contractor. This enabled quick erection of the building in the summer season while also minimizing the number of deliveries to the site and the amount of construction waste created.

Project Credits

  • Owner/Developer  Delta Land Developments
  • Architect  Perkins&Will
  • Structural Engineer  Glotman Simpson
  • Mechanical and Electrical Engineer  Integral Group
  • Building Envelope Consultant  RDH Building Science General
  • Contractor  Durfeld Construction
  • Code Consultant  GHL Consultants
  • Photos  Latreille Photography

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Kitsilano Duplex Retrofit

Vancouver, BC

Residential (Small) Award

Jury Comment: Given the requirement to maintain the historic character of the neighbourhood, and the imperative to add density by creating a duplex, meeting Passive House performance at this scale is a remarkable achievement. This project should be an inspiration for others like it in Vancouver and elsewhere.

A rare Canadian example of a Passive House EnerPHit retrofit, this duplex was fashioned from a 1940s single-family home.  The original home had been in the same family since the 1950s and had recently been gifted down to the grandson and granddaughter of the original owner. They decided to convert the house into a duplex, keeping one half each, but also decided to upgrade it to meet Passive House standards.

Development in much of Vancouver’s Kitsilano neighbourhood is subject to character retention guidelines; and balancing the required upgrade to Passive House thermal performance with the need to maintain architectural heritage was very challenging. However, by choosing to renovate rather than demolish the house and build new, the owners were able to retain more than 60% of the original framing material.

This dramatically lowered the embodied carbon of the building. By adding new structure to the existing framing, it was possible to bring the house up to current structural and seismic standards, while using far less new material than would have been required in an all-new building. Less new material, also translated into less construction waste.

It was necessary to lift the house to install a new crawl space basement which acts as a mechanical room and storage space. To further reduce embodied carbon, a ‘concrete free’ basement slab was installed, constructed with two layers of 15mm plywood laid directly on rigid insulation and compacted gravel.

The completed duplex is fully electric, with both electric heating and hot water. Rough-ins for air-to-air heat pumps were also made for future space cooling if needed. As summers in Vancouver are getting warmer, space cooling may become necessary for comfort in many buildings. The duplex is expected to use approximately 14 kWh/m²/year and is Passive house certified. Triple pane PH-certified wood windows are used within a wall assembly that consists of 2×6 framing with 4” of exterior mineral wool insulation.

The house uses triple pane Passive House-certified windows and doors by VETTA Building Technologies Inc.

A Mitsubishi Electric Sales Canada ductless heat pump handles heating and cooling.

Project Credits

  • Architect  DLP Architecture
  • General Contractor  Geography Contracting
  • Photos  Michael Renaud

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