Harold Walter OrrCM (born April 30, 1931) is a Canadian mechanical engineer known for his work on energy-efficient construction and air leakage in houses, in particular the prioritization of energy demand reduction over active systems through the use of superinsulation and airtightness in passive design.[1]
Among Orr's major technical works are Design and construction of low energy houses in Saskatchewan (1982) and Energy efficient housing on the prairies (1982).
Orr worked with the Building Research Division of the National Research Council (NRC) of Canada.[1] He focused on infiltration as a major component of heat loss.[1] His research on air leakage in houses led to the development of the blower door, a tool still used today for tightness testing in houses.[2][3][4] He also helped to develop the HotCan software, which continues to be used for whole house energy analysis and energy code compliance under the name HOT2000.[5][6]
In response to the energy crisis of the 1970s, Orr proposed radical insulation and airtight construction techniques. He served as the lead engineer on the construction of the Saskatchewan Conservation House (SCH), the world's most airtight house at the time. The SCH influenced the development of energy efficiency building codes in Canada and internationally, and shaped the field of energy-efficient construction, including passive solar building design and the German Passive house.[3][7]
Orr's work has earned him many accolades, including a Pioneer Award at the International Passive House Conference in Leipzig, Germany in 2015,[3] and being named a Member of the Order of Canada in 2017.[8]
^ abcRuby, Daniel (October 1981). "From the far north: lessons on how to slash fuel bills". Popular Science. Bonnier Corporation. pp. 106–108.
^Paulsen, Monte (2012). "Just Build It". Canadian Geographic. 132 (3).
^ abcCite error: The named reference :2 was invoked but never defined (see the help page).
^Dodge, David; Thompson, Dylan (May 6, 2016). "The first certified passive house in Saskatchewan". Pembina Institute. Retrieved 14 December 2023.
^Cite error: The named reference Parekh was invoked but never defined (see the help page).
^Riley, M. (June 1986). Ventilation and air quality monitoring in R-2000 homes: measurement and analysis(PDF). The R-2000 Home Program.
^Three Decades of Innovation in Housing Technology: 1966-1996(PDF). Government of Canada. 1999. pp. 68–74.
^Cite error: The named reference OC was invoked but never defined (see the help page).
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