Load Calculations and HVAC: Listen to IES’ Nathan Kegel on the ASHRAE Journal Podcast
May 11th 2026

Load Calculations and HVAC: Listen to IES’ Nathan Kegel on the ASHRAE Journal Podcast

This episode of the ASHRAE Journal Podcast features an interview and in-depth conversation with our very own Nathan Kegel, Vice President, Sales, North America, that focuses on the vital and diverse topic of load calculations – all guest-hosted by Matt Price, Founder and CEO at Day 3 Academy.
 
Featuring expertise and insight that explains the purpose and role of load calculations in the building design process – and where they fit within an engineer's workflow – Nathan and Matt explore the types of loads on a building including envelope, infiltration, internal, and ventilation loads, and the heat transfer mechanisms behind each. They also cover calculation methods and common mistakes and misconceptions, as well as a number of topics related to load calculations – including the comprehensive ASHRAE Heat Balance Method that incorporates detailed heat balance equations to account for both the convective and radiative heat transfer components, as well as latent heat fluxes.

The insight continues with Standard 183, as well as an analysis of Chapter 18 of the ASHRAE Handbook of Fundamentals, and much, much more. The discussion also highlights how HVAC simulation and modeling tools, such as our own IESVE software, are essential from the earliest design stages right through to construction and operations.
 
Matt's unique background as an engineer and sales executive helped him identify a gap in the market, and led him to set up Day 3 Academy, a company dedicated to training new commercial HVAC professionals.

This wide-ranging experience makes him the perfect host to interview Nathan, whose own in-depth knowledge and expertise across HVAC and load calculations make for a topical and supremely relevant discussion.

The ASHRAE Journal Podcast Series is the perfect place to tune in to conversations between leading ASHRAE experts as they discuss what HVAC engineers need to know to design better systems – and grow the HVAC&R industry. Nathan and Matt’s discussion is one not to be missed, and a must-listen for architects, engineers, and sustainability professionals.
 
Listen to the full podcast here or check out episode 60 of the ASHRAE Journal Podcast wherever you find your favourite podcasts.