In this episode of the HVAC Know It All Podcast, host Gary McCreadie welcomes Rachel Samala, CEO of California Mechanical, Heating & Air Conditioning. She is an HVAC technician, content creator known as ‘Miss Mini Split’ on Instagram. Based in San Diego, Rachel has over a decade of experience in the HVAC trade and has built a reputation for her innovative approaches to mini split installations.

Gary and Rachel dive into the essentials of mini split installation, offering practical tips, unique mounting techniques, and insights into the growing popularity of mini splits in California’s housing market. Rachel shares how her dedication to precision, affordability, and customer satisfaction has made her a trusted expert in the field.

Through anecdotes from her career and hands-on advice, Rachel inspires HVAC professionals to adopt efficient methods, maintain high standards of installation, and embrace the evolving technology of mini splits.

Expect to Learn:

Mini Splits in Affordable Housing: Discover why mini splits are a game-changer for California’s housing crisis, providing cost-effective and efficient HVAC solutions.

Mounting Mini Splits Securely: Learn Rachel’s innovative methods for mounting outdoor units, including wall brackets and threaded rod techniques inspired by Fujitsu’s guidelines.

The Importance of Quality Brands: Insights on choosing the right mini split brands for durability and performance, and why Rachel prefers AC Pro for its balance of quality and cost.

Flare Techniques and Tools: A deep dive into making leak-proof flares using spin bits, the Navac flare tool, and why Nylog is Rachel’s secret weapon for perfect seals.

Work-Life Balance as a Technician: Rachel shares her personal experiences juggling family life and a thriving HVAC career, including the challenges of bringing her kids to job sites.

Episode Highlights:

[00:33] - Guest Introduction

[02:14] - Welcoming Rachel Samala, AKA Miss Mini Split, and her HVAC journey

[05:02] - Mini Splits in Affordable Housing: How they address California’s housing crisis

[06:29] - Choosing the Right Brand: Rachel’s insights on balancing cost and quality

[12:01] - Mounting Techniques: Wall brackets, threaded rod methods, and roof solutions

[20:42] - Flaring and Sealing: Tools, techniques, and tips for leak-proof connections

[25:33] - Using Nylog: Application on flares and addressing system concerns

[31:05] - Evacuation Best Practices: Vacuum setups and ensuring system performance

[35:14] - Final Tips: Rachel’s advice for new and experienced HVAC technicians

This Episode is Kindly Sponsored by:

Cool Air Products

Master

Cintas

Supply House

Follow the Guest Rachel Samala on: 

Instagram - Miss Mini Split: www.instagram.com/missminisplit/

California Mechanical, Heating & Air Conditioning: www.calimech.com/

Follow the Host:

LinkedIn: www.linkedin.com/in/gary-mccreadie-38217a77/

Website: www.hvacknowitall.com

Facebook: www.facebook.com/hvacknowitall/

Instagram: www.instagram.com/hvacknowitall1/ 

Gary McCreadie takes us through a quick recap of 2024 and what's to come in 2025 for HVAC professionals. Check out our latest article on AI and how if will effect the HVAC industry. https://hvacknowitall.com/blog/navigating-ai-and-automation-a-technicians-guide-for-2025 Follow the Host: LinkedIn: www.linkedin.com/in/gary-mccreadie-38217a77/  Website: www.hvacknowitall.com  Facebook: www.facebook.com/hvacknowitall/   Instagram: www.instagram.com/hvacknowitall1/  

In this episode of the HVAC Know It All Podcast, host Gary McCreadie continues his conversation with Brent Lammert, who leads the Thermal Imaging Business Unit at Testo Instruments - North America. In part two of this insightful discussion, Brent dives deeper into the transformative applications of thermal imaging for HVAC professionals, showcasing its practical uses in diagnosing and resolving real-world challenges with speed and precision.

Gary and Brent explore specific scenarios where thermal cameras excel, such as identifying refrigerant restrictions, pinpointing hydronic system issues, and inspecting steam humidification systems. Brent also explains the role of thermal imaging during blower door tests to detect building envelope leaks and highlights the cost-saving potential for HVAC businesses using this technology.

From troubleshooting complex systems to improving customer satisfaction through faster, more accurate diagnostics, this episode offers practical advice and inspiring insights for HVAC technicians. If you’re looking to expand your toolkit and provide next-level service, thermal imaging might just be the “best-kept secret” you need to unlock.

Expect to Learn:

Thermal Imaging in Action: How HVAC professionals can use thermal cameras to identify refrigerant restrictions, ductwork inefficiencies, and equipment faults quickly and accurately.

Diagnosing Building Envelope Issues: Using thermal imaging during blower door tests to pinpoint air leaks and improve energy efficiency in homes and buildings.

Hydronic and Steam Systems: Practical applications of thermal cameras for troubleshooting issues in hydronic heating systems and steam humidification setups.

Refrigerant Leak Insights: Understanding how thermal cameras can identify refrigerant leaks by detecting temperature anomalies in unexpected areas.

Business Benefits of Thermal Tools: How thermal imaging can enhance service quality, save time, and open up new revenue opportunities for HVAC contractors.

Episode Highlights:

[00:33] – Podcast Introduction & Recap of Part 1

[02:24] – Thermal Imaging for HVAC Technicians: Identifying Building vs. System Issues

[05:27] – Using Thermal Cameras to Troubleshoot Refrigeration Systems and Filter Dryers

[06:56] – Hydronic Systems: Pinpointing Zone Control Issues with Thermal Imaging

[10:07] – Can Thermal Cameras Detect Refrigerant Leaks? Brent Explains the Process

[18:29] – Thermal Imaging and Blower Door Tests: A Powerful Combination

[20:26] – Testo’s Vision: Affordable Thermal Imaging Tools for Field Technicians

[22:25] – Future Educational Campaign: Tips and Tricks for Using Thermal Cameras

[24:40] – Conclusion: Key Takeaways on the Value of Thermal Imaging and Its Impact on HVAC Workflows

This Episode is Kindly Sponsored by:

Cool Air Products

Master

Cintas

Supply House

Follow the Guest Brent Lammert on: 

LinkedIn: www.linkedin.com/in/brentlammert/

Testo Instruments - North America: www.linkedin.com/company/testo-usa/ 

Follow the Host:

LinkedIn: www.linkedin.com/in/gary-mccreadie-38217a77/ 

Website: www.hvacknowitall.com 

Facebook: www.facebook.com/hvacknowitall/  

Instagram: www.instagram.com/hvacknowitall1/  

In this episode of the HVAC Know It All Podcast, host Gary McCreadie sits down with Brent Lammert, who leads the Thermal Imaging Business Unit at Testo Instruments - North America, for part one of their engaging conversation on the game-changing applications of thermal imaging in HVAC, plumbing, and electrical trades. Brent, now with Testo, shares insights into leveraging thermal cameras for identifying issues like air leaks, ductwork problems, and electrical faults with unmatched speed and accuracy.

Gary and Brent explore the core principles of thermal imaging, from detecting building envelope inefficiencies to using thermal imaging for compliance with new NFPA 70B standards. Brent also sheds light on the business potential of offering thermography as a service, backed by practical tips and real-world examples of improving safety, reliability, and customer satisfaction.

Packed with actionable advice and thought-provoking discussions, this episode is a must-listen for HVAC professionals looking to stay ahead of the curve by integrating innovative tools into their workflows.

Expect to Learn:

The Basics of Thermal Imaging: Core principles and killer applications of thermal cameras for HVAC, plumbing, and electrical trades.

Building Envelope Insights: How to identify air leaks, missing insulation, and other building inefficiencies to improve comfort and energy efficiency.

NFPA 70B Compliance: Leveraging thermal imaging for electrical inspections to meet industry standards and reduce liability risks.

Business Opportunities in Thermography: Strategies for contractors to add value and generate recurring revenue through thermal imaging services.

Real-World Applications: Practical examples of detecting water leaks, troubleshooting HVAC issues, and resolving customer comfort problems with thermal imaging.

Episode Highlights:

[00:33] – Podcast Introduction

[02:50] – Welcoming Brent Lammert and the Importance of Thermal Imaging

[03:45] – Applications of Thermal Cameras in HVAC, Plumbing, and Electrical Trades

[06:56] – NFPA 70B Compliance: A New Standard for Electrical Inspections

[10:08] – Business Opportunities: Leveraging Thermal Imaging for Recurring Revenue

[11:41] – Identifying Building Envelope Issues: Air Leaks and Missing Insulation

[16:03] – Practical Tips for Using Thermal Cameras Effectively

[17:48] – Understanding Emissivity: What it is and how it impacts thermal imaging accuracy.

[23:41] – Detecting Water Leaks Behind Walls with Thermal Imaging

This Episode is Kindly Sponsored by:

Cool Air Products

Master

Cintas

Supply House

Follow the Guest Brent Lammert on: 

LinkedIn: www.linkedin.com/in/brentlammert/

Testo Instruments - North America: www.linkedin.com/company/testo-usa/ 

Follow the Host:LinkedIn: www.linkedin.com/in/gary-mccreadie-38217a77/ 

Website: www.hvacknowitall.com 

Facebook: www.facebook.com/hvacknowitall/  

Instagram: www.instagram.com/hvacknowitall1/  

In this episode of the HVAC Know It All Podcast, host Gary McCreadie is joined by Julian Finbow, HVAC/R Educator, Mentor, Content Writer, and Founder of Finbow Inc., for part two of their in-depth conversation on pressure testing in HVAC and refrigeration systems.

This episode dives into key topics, including troubleshooting leaking Schrader valves, best practices for flaring techniques, and the role of both pressure testing and evacuation in ensuring system integrity. Julian shares his technical expertise and hands-on experience, offering insights into precision, safety, and efficiency.

With actionable tips and real-world examples, this discussion is a must-listen for HVAC professionals looking to refine their diagnostic and installation skills.

Expect to Learn:

Managing Leaking Schrader Valves: Effective methods for troubleshooting and addressing leaks in Schrader valves, a common challenge in HVAC systems.

Flaring Techniques: Best practices for achieving proper, leak-free flares, including the debate over reaming and the role of tools like torque wrenches.

Pressure Testing vs. Evacuation: Why both processes are critical and how to execute them for maximum accuracy and safety.

Using Sealants like Nylog: How Nylog can be applied to flares and Schrader caps to enhance sealing and prevent leaks.

Real-World Insights: Practical tips and experiences from Julian and Gary’s years in the field, including solutions for common system issues.

Episode Highlights:

[00:33] - Podcast Introduction & Recap of Part 1

[02:21] - Different Approaches to Pressure Testing: Timing and Customer Expectationss

[04:56] - Flapper Valves and Common Challenges in Pressure Testing & Evacuation Testing

[08:49] - Flaring Techniques: Debates on Reaming and Best Practices

[14:37] - Nylog for Sealing Flares: Practical Applications

[17:53] - Schrader Valves: Challenges, Misconceptions, and Best Practices

[23:42] - Final Tips for Successful Pressure Testing and Episode Wrap-Up

This Episode is Kindly Sponsored by:

Cool Air Products

Master

Cintas

Supply House

Follow the Guest Julian Finbow on: 

LinkedIn: https://www.linkedin.com/in/julian-finbow-rse-1048038b/

Finbow Inc.: https://www.linkedin.com/company/finbow-inc/

Follow the Host:

LinkedIn: www.linkedin.com/in/gary-mccreadie-38217a77/

Website: www.hvacknowitall.com

Facebook: www.facebook.com/hvacknowitall/

Instagram: www.instagram.com/hvacknowitall1/

In this episode of the HVAC Know It All Podcast, host Gary McCreadie welcomes Julian Finbow, HVAC/R Educator, Mentor, Content Writer, and Founder of Finbow Inc., for part one of their discussion on pressure testing in HVAC and refrigeration systems. Julian shares his expertise on managing live systems, addressing leaking valves, and following best practices to ensure safety and efficiency.

Through practical tips and real-world anecdotes, Gary and Julian highlight the importance of precision, proper equipment, and diligent inspections. They discuss key challenges, such as managing live systems and addressing leaks, while emphasizing safety at every step. Julian’s technical knowledge and hands-on experience make this episode a valuable resource for HVAC professionals aiming to enhance their skills, adapt to industry standards, and execute flawless installations.

Expect to Learn:

Managing Live Systems: Key techniques for handling live systems and addressing challenges like leaking valves.

Safety with High-Pressure Equipment: Essential safety measures for working with nitrogen tanks and pressure regulators.

Best Practices for Pressure Testing: A step-by-step approach to ensuring system integrity during installations and maintenance.

Inspection Tools and Tips: The importance of thorough inspections and the tools that make the process efficient.

Real-World HVAC Scenarios: Practical examples and lessons learned from Julian’s and Gary’s field experiences.

Episode Highlights:

[00:33] - Podcast Introduction

[02:32] - Welcoming Julian Finbow and an Overview of Pressure Testing

[04:39] - Safety Measures: Handling Nitrogen Tanks and Regulators

[08:58] - Real-World Challenges: Live Systems and Leaking Valves

[17:51] - Pressure Testing Tips for Residential and Smaller Systems

[25:09] - Tools and Techniques for Accurate Inspections

[27:40] - Common Mistakes and Lessons Learned from the Field

This Episode is Kindly Sponsored by:

Cool Air Products

Master

Cintas

Supply House

Follow the Guest Julian Finbow on: 

LinkedIn: https://www.linkedin.com/in/julian-finbow-rse-1048038b/

Finbow Inc.: https://www.linkedin.com/company/finbow-inc/

Follow the Host on:

LinkedIn: www.linkedin.com/in/gary-mccreadie-38217a77/

Website: www.hvacknowitall.com

Facebook: www.facebook.com/hvacknowitall/

Instagram: www.instagram.com/hvacknowitall1/ 

In this episode of the HVAC Know It All Podcast, host Gary McCreadie is joined by Kevin Gill, Director of Technical Projects & Business Development – Refrigeration of The Master Group, for part two of their discussion on the H2O refrigerant transition in North America. Building on the first part of this series, Kevin takes a deeper dive into the practical challenges and innovative solutions that HVAC professionals will face as they shift towards the new refrigerants. The conversation explores topics such as the flammability concerns of the new refrigerants, the role of sensors in system monitoring, and the specialized tools required for this transition.

Kevin Gill brings his extensive experience in refrigeration and HVAC systems to this episode, providing valuable insights into the technical and safety considerations surrounding the H2O refrigerant shift. His expertise helps contractors understand the nuances of implementing new technologies, ensuring safety, and future-proofing their work for evolving regulations and standards.

Expect to Learn:

Flammability of New Refrigerants: Understanding the real flammability risks and necessary safety measures.

Role of Sensors in HVAC: How sensors will enhance system monitoring and safety.

Specialized Tools: The new tools required for working with modern refrigerants and their benefits.

Adapting to Changes: Tips for HVAC pros to adjust to evolving refrigerant standards and practices.

Practical Insights: How contractors can stay ahead with new tech, tools, and regulations.

Episode Breakdown: [00:32] - Podcast Introduction

[04:02] - Flammability of New Refrigerants

[07:48] - Taking the Lead in Refrigeration

[17:43] - Understanding ASHRAE Refrigerant Flammability Differences

[22:19] - Navigating Future Equipment Changes

[26:04] - Tracking the Adoption of CSA B52 Standards

[28:42] - Safety Concerns with New Systems

[37:01] - Final Thoughts and Closing Remarks

This episode is kindly sponsored by:

Cool Air Products

Master

Cintas

Supply House

Connect with The Master Group: The Master Group LinkedIn: www.linkedin.com/company/themastergroup/ 

The Master Group Website: www.master.ca

Follow the Host:

LinkedIn: www.linkedin.com/in/gary-mccreadie-38217a77/

Website: www.hvacknowitall.com

Facebook: www.facebook.com/hvacknowitall/

Instagram: www.instagram.com/hvacknowitall1/ 

Residential HVAC sales can be a pushy business at times. Pushy because techs are trained to sell rather than service. Why is this? For profit I would imagine but we can generate nice margins by understanding the trade deeply and applying skill to seek out actual problems and recommending actual solutions. Check out Jobber www.getjobber.com/hvacknowitall Check out the article Gary McCreadie wrote on this subject. https://hvacknowitall.com/blog/the-truth-about-furnace-tune-ups Please follow me on my back up Facebook account. https://www.facebook.com/profile.php?id=61569643061429&mibextid=ZbWKwL

In this episode of the HVAC Know It All Podcast, host Gary McCreadie is joined by Kevin Gill, Director of Technical Projects & Business Development – Refrigeration of The Master Group for part one of their discussion on the evolving landscape of refrigerants in the North American market. With the A2L refrigerant transition looming on the horizon, Kevin offers a deep dive into the key aspects of these regulatory changes, their impact on the HVAC industry, and how contractors can adapt. The episode touches on the environmental and regulatory pressures driving these changes, such as the Montreal Protocol and Kigali Amendment, and how these international agreements are shaping refrigerant choices and equipment standards. Kevin Gill brings a wealth of experience to the conversation, with expertise in refrigerants, HVAC systems, and global climate policies. As a passionate advocate for environmental sustainability, Kevin discusses both the technical and practical aspects of transitioning to lower-GWP refrigerants, helping technicians understand what’s at stake and how to future-proof their practices. Expect to Learn: Refrigerant Evolution: A brief history of refrigerants, from the use of R12 and R22 to the present-day shift toward A2L and low-GWP refrigerants. Global Warming Potential (GWP): Understanding how GWP plays a key role in refrigerant regulation and the future of HVAC systems. Transition to A2L: What the move to A2L refrigerants means for the industry and the tools required for safe handling. Impact of Montreal Protocol and Kigali Amendment: How these global agreements have shaped current refrigerant legislation and phase-out schedules. Practical Tips: How HVAC professionals can adapt to the transition, with insights into new tools, system modifications, and legislation deadlines. Episode Highlights: [00:33] - Guest Introduction [01:50] - Podcast Introduction [03:41] - The Evolution of Refrigerants [05:25] - Environmental Impact and Legislation [08:55] - Challenges of Transitioning from R22 [17:04] - Understanding Enforcement Dates [25:46] - Focus on Canadian Legislation [29:31] - Missing Clarity in Refrigeration Legislation This episode is kindly sponsored by: Cool Air Products Master Cintas Supply House Connect with The Master Group: The Master Group LinkedIn: www.linkedin.com/company/themastergroup/  The Master Group Website: www.master.ca Follow the Host: LinkedIn: www.linkedin.com/in/gary-mccreadie-38217a77/ Website: www.hvacknowitall.com Facebook: www.facebook.com/hvacknowitall/ Instagram: www.instagram.com/hvacknowitall1/ 

In this episode of the HVAC Know It All Podcast, host Gary McCreadie dives into advanced combustion analysis with Jason Esteves from Seitron Americas Inc. The episode builds on previous discussions of basic and intermediate combustion principles, diving into the stoichiometric curve—a key concept for mastering combustion efficiency and safety.

Jason Esteves is a seasoned expert in combustion technology and training, representing Seitron Americas Inc. With over 20 years of experience in the field, Jason combines technical expertise with a passion for educating HVAC professionals, making complex combustion concepts accessible and practical for technicians in the field.

Expect to learn:

• Theoretical Combustion: Stoichiometric combustion is a guiding principle but impossible to achieve in practice.

• Efficiency with the Curve: Use the stoichiometric curve to balance efficiency and minimize CO emissions.

• Analyzer Tools: Advanced features like "Pro Mode" simplify diagnostics for technicians.

• NOx Emissions: Modern systems reduce harmful NOx emissions caused by high-temperature combustion.

• Avoiding Errors: Proper venting and following manufacturer specs ensure safety and efficiency.

  
  

  Episode Highlights:

  [00:33] - Guest Introduction 

  [01:41] - Podcast Introduction

  [02:10] - Understanding Stoichiometric Combustion

  [07:10] - Navigating the Stoichiometric Curve

  [15:09] - Using Combustion Analyzers Effectively

  [22:26] - Understanding NOx Emissions

  [24:44] - The Importance of Proper Venting

  [27:04] - Closing Thoughts and Open Invitation for Further Learning
  

Follow the Guest Jason Esteves on:
LinkedIn: www.linkedin.com/in/jason-esteves-9690255/

Seitron Americas LinkedIn: www.linkedin.com/company/seitron-americas-inc/

For a copy of Jason’s training presentation on combustion or any combustion-related queries, contact him directly at: [email protected]

Follow the Host on:

LinkedIn: www.linkedin.com/in/gary-mccreadie-38217a77/

Website: www.hvacknowitall.com

Facebook: www.facebook.com/hvacknowitall/

Instagram: www.instagram.com/hvacknowitall1/

Gary McCreadie takes us on a commercial HVAC service call troubleshooting a Carrier rooftop unit.

The problem was not 100% apparent, it took a little leg work and a couple of visits to solve.

https://www.master.ca/professional/ www.cintas.com/HVACKnowItAll Save 8% on your purchase https://www.trutechtools.com/ with promo code knowitall Check out the HVAC Know It All app app.hvacknowitall.com https://www.hvacknowithttps://www.instagram.com/hvacknowitall1/all.com/pages/about Visit HVAC Know It All on social media Facebook https://www.facebook.com/hvacknowitall/ Instagram https://www.instagram.com/hvacknowitall1/