Dual Temperature Buildings: High Carbon & Energy Users, Leveraging Capital Upgrades for the LL97 Paradigm

Dual temperature buildings utilize a hydronic loop for both heating and cooling and typically rely on steam boilers or utility steam and steam-fed chillers. These buildings typically use at least 20% higher energy use indexes (EUIs) with 15% higher carbon emissions than similar buildings that lack central cooling. Dual temperature buildings will need a capital plan for complying with LL97, which requires 88% reduction of carbon emissions through 2050. We will present case studies that showcase best practices and HVAC design considerations, carbon, energy, and cost savings data, and construction hurdles and outcomes. Our presentation provides a framework to make sustainable and cost-effective decisions when investing in carbon-reduction upgrades to dual-temperature buildings under the lens of LL97 and its carbon-reduction goals.

Session Speaker(s): 

Session Chair(s): 

Event Time: 

Thursday, September 24, 2020 - 9:00am to 10:00am

Experience Level: 

2 (some prior experience/knowledge helpful)

CEU Information: 

BPI 1.0 hour
GBCI BD+C, ID+C 1.0 hour

Learning Objectives:

  • Attendees will be able to speak to the energy and carbon impact that dual temperature buildings have in NYC.
  • Attendees will be able to persuade decision-makers to undertake carbon and energy reduction upgrades that align with the goals of LL97.
  • Attendees will be able to facilitate and lead discussions within their own organizations regarding pros and cons of various heating and cooling plant upgrades.
  • Attendees will have a framework with which to make better, more cost-effective decisions when deciding which type of carbon-reduction upgrades to implement.

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