In this episode of the Building HVAC Science Podcast, host Bill Spohn is joined by co-host Eric Kaiser and guest Russ King to discuss various aspects of HVAC design, focusing on the complexities and updates to Manual S, a critical document for HVAC equipment selection. Russ King shares his extensive background in building energy modeling and HVAC design, including his journey from traditional HVAC methods to co-founding Coded Energy, a company that developed Kwik Model 3D, a 3D modeling software for load calculations, which has greatly simplified and improved the accuracy of HVAC designs.

The conversation delves into the intricacies of Manual S, highlighting how it has evolved to better address modern challenges in HVAC design, particularly with the rise of variable speed equipment and the need for more precise dehumidification strategies. The guests discuss the importance of proper equipment sizing to ensure comfort and efficiency, and they explore how Manual S provides a structured approach to this process. They also touch on the challenges contractors face in following these guidelines, noting that despite the benefits, a relatively small percentage of designs adhere strictly to Manual S due to a lack of awareness or understanding within the industry.

The episode concludes with insights into practical HVAC design challenges, such as thermostat placement and the importance of air distribution, emphasizing the need for continuous learning and application of best practices. Both Eric and Russ stress the value of using accurate data and following established guidelines to improve the overall quality and performance of HVAC systems, urging listeners to engage with the math behind the designs and to collaborate with others in the industry to refine their skills.

Russ’ LinkedIn: https://www.linkedin.com/in/russell-king-m-e-70342913/

Kwik Model 3D website: https://kwikmodel.com

Downloadable Manual S: https://www.acca.org/standards/technical-manuals/manual-s

SpeedSheets downloads

https://www.acca.org/standards/speedsheets/speedsheets-download?submissionGuid=645e594e-00c3-4006-8983-086f39f6fd35

ACCA Approved software:

https://www.acca.org/standards/approved-software

The Structure and “path” of using ACCA manuals in Residential and Commercial Applications:

https://www.acca.org/standards/technical-manuals

Overview of Manual S:

https://www.viridiant.org/wp-content/uploads/2022/01/Manual-S-Brochure_.pdf

Free Online Sizing calulator:

https://www.loadcalc.net/sizing.php

An Overview of Manual S:

https://www.load-calculations.com/what-is-acca-manual-s-.html

This episode was recorded in August 2024.