(On-Demand) A Tale of Two Buildings: Operational performance comparison of PHIUS+ and ENERGY STAR

  • Saturday, December 31, 2022
  • Online/On-Demand (Available thru 12/31/2022)



60-minute webinar available on-demand until 12/31/2022

(Originally recorded live for the New Gravity Housing Conference on 8/5/2020)

  • FREE access for Illinois Green Members and $10 access for non-members.
  • Please register using the registration button on the left to gain access to this on-demand webinar.
  • Direct video link will be shared in your confirmation email.

The ComEd funded research study in partnership with Slipstream, LUCHA, Linn-Mathes, EcoAchievers, and PHIUS looks to compare operational performance of two affordable housing 6-unit buildings monitored over the course of 18 months collecting over 20 billion data points. Each of the buildings participated in the ComEd Affordable Housing program, share the same Chicago neighborhood, footprint, and floorplan. One of buildings uses gas heat and was designed to EnergyStar® requirements and the other air source heat pumps meeting PHIUS+ 2015 certification.

While PHIUS maintains a compilation of projects with post-construction data, those case studies focus on total energy consumption. These heavily instrumented buildings provide an in-depth assessment of energy use, heating and cooling loads, indoor air quality, and utility costs. We will cover key findings on each of these topics looking at how building envelope, ventilation strategies, heat pump and furnace characteristics, hot water systems, and occupant behavior factor into overall performance.


  • Charlene Andreas | Director of Building Development | Latin United Community Housing Association (LUCHA)

  • Lindsey Elton | RESNET, BPI PHIUS+ Rater/Verifier | President | Eco Achievers

  • Connor Jansen | PE, LEED AP BD+C, RESET AP | Technical Services Director | Slipstream

  • Lisa White | CPHC | Associate Director | Passive House Institute US (PHIUS)

Continuing Education:

This webinar is eligible to self-report to USGBC for 1 credit hour towards your LEED professional credential. You can find self reporting instructions in your confirmation email.


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