Energy Retrofits – Comparing Active and Passive Strategies

GBCI course ID: # 0920012837

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Purpose of Article
The article describes how a post-secondary institution selected retrofit packages when presented with many possible options, including both envelope and HVAC strategies. It provides an overview of the N Building Energy Retrofit Project at Humber College in Toronto, and the process it underwent in order to help achieve the University’s Integrated Energy Master Plan’s energy and greenhouse gas targets. It clarifies the important aspects of a holistic approach to energy savings as it relates to Humber College selecting an energy retrofit package for the N building.

The article introduces the reader to the relationship between the energy savings of a retrofit strategy and the cost implications of that strategy, and discusses how particular potential strategies for the N Building were evaluated based on cost and energy savings. The article also uses the N Building as a case study to introduce the reader to various building envelope design and maintenance issues, such as exposed structure and lack of a rainscreen system, which have adversely affected the overall energy performance of the building and the occupant thermal comfort and indoor air quality.

Learning Objectives
1. Understand the value of retrofitting existing buildings over demolishing and constructing new buildings, and why this can help reduce costs, increase occupant health and thermal comfort, and reduce energy consumption and greenhouse gas emissions.
2. Understand deferred maintenance and why the growing amount of unaddressed deferred maintenance items are negatively impacting the overall energy performance of buildings.
3. Understand the aspects of a holistic energy analysis, and the factors and outcomes owners must consider when making decisions on a retrofit package under a holistic energy analysis framework.
4. Understand the relationship between passive or active retrofit strategies, and the building’s life cycle and long-term durability.

All articles offered by SABMag are GBCI approved. To qualify for continuing education learning hours, practitioners must first read the technical article below, and then proceed to complete the short quiz at the end. You must receive 80% on the quiz to record the activity as part of your continuing education. An email will be sent to you and will act as your certificate of completion once you have successfully completed the requirements.

Quiz by: Aman Hehar and Matthew Tokarik