Ladybug+Honeybee: Wintertime Indoor Thermal Comfort Visualization - Eliminating Perimeter Heat with High-Performing Facades




March 30, 2017

While the building industry has traditionally addressed wintertime discomfort near glazing through the application of perimeter heating elements, recent interest in energy efficiency and comfort has challenged this practice with a powerful question: What facade properties would provide warm enough interior surface temperatures to fully mitigate thermal discomfort and merit the removal of perimeter heat? Research has revealed that there are many combinations of contemporary insulated glazing assemblies and window geometries that satisfy the strictest thermal comfort standards on their own. This has opened opportunities for energy use savings, maintenance + HVAC cost savings, and generally simpler, sleeker building designs.

This session will show two methods for assessing wintertime comfort in the absence of perimeter heat: one that is web-based for fast order-of-magnitude comparisons, and another that uses Ladybug to evaluate more complex spatial and temporal conditions. Both full-body radiant discomfort and discomfort from cold downdrafts will be modeled and quantified. 

Date & Time: Thu, Mar 30, 2017; 9:30 AM - 11:30 AM PDT

Learn More & Register:​

** IBPSA-USA members save $10 on Performance.Network trainings, which reduces the non-member $15 registration fee to $5. Just use the code ibpsaus. Learn more here. **

About the Presenter: 

Chris Mackey is a building scientist and designer at Payette Architects as well as a recent graduate of MIT’s Masters of Architecture and Masters of Science in Building Technology 
programs. His completed thesis involved the development of software to produce high-resolution thermal comfort maps of buildings off of EnergyPlus results as well as a new suite of spatial thermal comfort metrics that mirror those currently used to quantify daylight. 

SKILLS & TOPICS: Chris has intimate knowledge of the following languages / software: Python, Grasshopper, Rhino (incl. RhinoCommon), EnergyPlus, OpenStudio. In his free time, Chris is an avid contributor to the Ladybug + Honeybee environmental analysis plugins for grasshopper and is currently in the process of building a new “insect” to link these two plugins and the Rhino/Grasshopper interface to macro-scale climate modeling engines and data sets.


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