The Fix household embarked on a deep energy retrofit project, which encompassed the complete renewal of a modest 1943 mature neighbourhood wartime home in Edmonton into a healthy, comfortable, and energy efficient home. We targeted an 80% reduction in energy consumption through exterior super-insulation and improved airtightness, as well as new highly efficient HVAC systems. We achieved a 90% reduction, and a tremendous [email protected] airtightness. We followed Harold Orr's basic chainsaw retrofit approach for the exterior; tried, tested, & proven!
Maradona Energy Retrofit
Located near the heart of Edmonton, this build features super insulated walls and high performance windows and doors. Additionally, a rain screen was installed creating an airtight building envelope and an overall extremely energy efficient home.
Sundance Housing Cooperative Retrofit
Sundance Housing Co-operative will be undertaking a Deep Energy Retrofit (DER) on its 59 town homes. A DER involves the retrofit of a building enclosure and other building systems in a way that results in a high performance building and also provides benefits to building durability, comfort, and indoor air quality. The proposed DER will create a high performance envelope with a high degree of air-tightness (~0.5 air changes per hour-ACH) and significantly enhanced insulation values, from the current nominal R20 (effective R12) to a range between effective R35 to R55 (depending on optimized modelling analysis). The result will be similar to a Passive House design, with an expected reduction in energy use of 80% or greater using a strategy of re-cladding the exterior of the building (typically walls, foundations and roof) with a new continuous moisture/air barrier which dramatically reduces the air leakage rates, exterior applied thermally broken insulation layers and a rain-screen finish detail.
A DER includes the addition of Heat Recovery Ventilators to ensure healthy indoor air quality once the air leakage rate of the building is lowered down to 0.5 ACH. Finally, the DER is expected to reduce the energy demands to such an extent that the development may ultimately be able to cost effectively replace all of its gas based appliances (furnaces and hot water tanks) with electric alternatives, thus not only eliminating its reliance on a green house gas producing energy source for heating and hot water, but effectively permitting the entire development to eventually switch to 100% renewable energy providers, thus turning the project into an effective net-zero project.
The work is being done by Butterwick Projects Ltd, whose principles include Peter Amerongen, Stuart Fix and Dave & Annalee Butterwick. It will be done in two Phases. Phase 1 (research and development phase) will focus on units 8 & 9. It is anticipated that the work on this Phase will start this month will be complete this spring. Between the completion of this work and the fall of 2019, the design and development team will test the performance of the building envelope, assess the results and modify the approach a required. Work should start on Phase 2 (balance of the 57 units) in October of 2019 and be completed by the spring of 2020.