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Fiona Aldous, Member ASHRAE

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ASHRAE Course Instructor

Fiona Aldous, Member ASHRAE


    Fiona Aldous is a Principal with Wiss Janney Elstner Associates. She has performed comprehensive, technical building enclosure commissioning on numerous buildings. Fiona has extensive, hands-on knowledge of building enclosures and the commissioning (BECx) process. Her experience includes design, detailing and installation of various high-performance enclosures, comprising curtain wall and window systems, air barriers, waterproofing of below-grade and plaza systems, low slope and steep roofs and the interfaces of the various enclosure components.

    Fiona is an accredited Building Enclosure Commissioning Process Provider (BECxP), and Commissioning Authority + Building Enclosure (CxA+BE). She actively serves on ASHRAE technical committees, on the Board of Directors for ABAA, and as past-Chair of the National Building Enclosure Council (BEC-N). Fiona was a prime author of NIBS/ASHRAE Guideline 3 - The BECx Process, the Building Enclosure Commissioning (BECx) industry’s founding document. In addition to practice, Fiona teaches BECx on behalf of numerous organizations’ commissioning programs, which include the topics of the design and construction of a successful building enclosure. Fiona is one of the founding members of the Building Enclosure Commissioning Collaborative.