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HVAC Know It All Podcast: Daily Summaries Delivered
by Gary McCreadie
The HVAC Know It All Podcast, hosted by HVAC and Refrigeration tech Gary McCreadie, is an industry leading show that focuses on education within the HVAC and Refrigeration Trade - Such as HVAC Maintenance Tips.
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- 2 days ago20 min
HVAC Heat Recovery Systems for Buildings That Replace Boilers and Reduce Costs with David Kim Part 2
In this episode of the HVAC Know It All Podcast, host Gary McCreadie continues his conversation with David Kim, Engineering Manager at LG Electronics, about advanced VRF technology and new heating and cooling solutions. David explains how LG's Hydro Kit works for hydronic heating and domestic hot water, along with water communication kits for larger systems. The discussion also covers chiller applications, data center cooling, cold climate residential heat pumps, dual fuel systems, smart thermostat controls, and AI features that improve system performance and energy efficiency. Gary and David discuss LG's latest VRF solutions and how they can improve heating, cooling, and hot water applications. David explains how the Hydro Kit and water communication kit support hydronic systems, along with their use in boiler replacement projects. The conversation also covers chiller solutions for larger applications, residential cold climate heat pumps, dual fuel systems, smart thermostat controls, and AI features that help improve efficiency and overall system performance. Expect to Learn: How LG's Hydro Kit supports hydronic heating and domestic hot water applications. How water communication kits expand VRF capacity for small and large projects. Why chillers are a better choice for large data center cooling applications. How LG cold climate heat pumps and dual fuel systems improve residential heating. How LG's smart controls, ThinkQ app, and AI features help improve system performance and efficiency. Episode Highlights: [00:00] - Sponsor: Factory Direct Filters ad [00:42] - Intro to David Kim in Part 02 [02:06] - Hydro kit explained: air-to-water, mid-temp vs high-temp (up to 176°F) [03:45] - Replacing boilers & water communication kit (1 to 32 ton capacity) [06:49] - LG chiller lineup for data centres & large applications [11:07] - Residential cold climate heat pumps: Deluxe unit works at -35°C [15:03] - Dual fuel systems: 24V control vs LG thermostat with EIM for true variable speed [18:11] - AI snow removal feature using AccuWeather data This Episode is Kindly Sponsored by: Cintas: https://www.cintas.com/hvacknowitall Cool Air Products: https://www.coolairproducts.net/ Factory Direct Filters: https://www.factorydirectfilters.com/ SupplyHouse: https://www.supplyhouse.com/tm Use promo code HKIA5 to get 5% off your first order at Supplyhouse! Follow the Guest David Kim on: LinkedIn Profile: https://www.linkedin.com/in/david-kim-156b9878/ LinkedIn - LG Electronics: https://www.linkedin.com/company/lg-electronics Follow the Host on: LinkedIn: https://www.linkedin.com/in/gary-mccreadie-38217a77/ LinkedIn - HVAC Know It All Inc.: https://www.linkedin.com/company/hvac-know-it-all-inc Website: https://www.hvacknowitall.com Facebook: <a href= "https://www.facebook.com/people/HVAC-Know-It-
- 3 days ago20 min
How to Scale an HVAC Business from $500K to $5M | Office Management, Marketing & Operations with Valeria Velázquez
In this episode of the HVAC Know It All Business Edition Podcast, co-hosts Gary McCreadie and Furman Haynes from WorkHero sit down with Valeria Velázquez, Director of Customer Strategy at WorkHero and Co-Founder of Climate Champions to discuss what it really takes to grow and scale a successful HVAC business. Drawing from her experience helping transform an HVAC company from under $1 million to $5 million in revenue, Valeria shares practical lessons on business operations, leadership, marketing, customer retention, and building high-performing office teams. She also reflects on growing up in an HVAC family, the importance of community involvement, and why mastering the fundamentals is the key to sustainable growth. Valeria Velázquez is an HVAC business operations leader with extensive experience scaling residential HVAC companies through operational excellence, leadership, and process improvement. After helping grow an HVAC business from a small operation into a multi-million-dollar business, she has become a trusted voice on office management, customer experience, marketing systems, and helping contractors build businesses that can grow without sacrificing service quality. Expect To Learn: - Why being a great technician doesn't automatically make you a great business owner. - How community involvement can become one of your strongest marketing strategies. - The systems every HVAC company needs before investing in paid marketing. - Why recurring maintenance agreements are essential for long-term growth. - How a strong office manager can transform an HVAC business. - The biggest lessons from scaling an HVAC company from $500K to $5M. - Practical advice for dispatchers, CSRs, and office staff looking to grow into leadership roles. Timestamps: 00:00 – Introduction 01:24 – Why Small Business Owners Strengthen Their Communities 04:35 – Growing Up in an HVAC Family 07:42 – Scaling an HVAC Business from $500K to $5 Million 09:54 – Building Recurring Revenue with Service Agreements 14:27 – Why Great Office Managers Drive Business Growth. 15:36 – Where Growth Really Comes From 17:12 – The Marketing Strategies Every HVAC Contractor Needs 18:50 – Building a High-Performing Office Team 19:22 – Advice for Dispatchers and CSRs Who Want to Lead Follow our Guest Valeria Velázquez: LinkedIn: https://www.linkedin.com/in/valeria-velazquez-6a00402b7/ Company LinkedIn: Climate Champions: https://www.linkedin.com/company/callthechampions/ WorkHero: https://www.linkedin.com/company/workherohvac/ Company Website: Climate Champions: https://www.callthechampions.com/ WorkHero: https://www.workhero.pro/ Company Instagram: WorkHero: https://www.instagram.com/workhero__/ Follow Gary McCreadie: LinkedIn: https://www.linkedin.com/in/gary-mccreadie-38217a77/ Website: https://www.hvacknowitall.com Facebook: <a href= "https://www.facebook.com/pe
- 3 days ago22 min
AI-Driven VRF Systems for HVAC Pros to Improve Efficiency using LG Multi V i Tech - David Kim Part 1
In this episode of the HVAC Know It All Podcast, host Gary McCreadie is joined by David Kim, Engineering Manager at LG Electronics, to discuss variable refrigerant flow systems and how they work. David explains the difference between heat pump and heat recovery VRF systems, how inverter compressors and electronic expansion valves control refrigerant flow, and why each indoor unit can operate with its own set point. The conversation covers VRF system design, piping, refrigerant charge calculations, and the use of LG's LATS HVAC software. Gary and David also discuss the importance of nitrogen brazing, the temporary use of filter driers after service, and the move from R410A to R32 refrigerant. They also explore LG's Multi V i system, including its improved heating performance, service data tracking, building automation options, and higher system capacity. In this conversation, David explains what variable refrigerant flow systems are and how they provide heating and cooling to different indoor zones. He discusses the difference between heat pump and heat recovery systems, along with how inverter compressors and electronic expansion valves control refrigerant flow. David and Gary explore topics such as VRF system design, piping, refrigerant charge, nitrogen brazing, and the use of LG's LATS HVAC software. They also discuss the move from R410A to R32 refrigerant, the features of LG's Multi V i system, and why proper installation, system design, and service practices are important for reliable performance. Expect to Learn: What variable refrigerant flow systems are and how they provide heating and cooling to different zones. The difference between heat pump and heat recovery VRF systems and how each one operates. How inverter compressors and electronic expansion valves control refrigerant flow. Why proper VRF design, piping, refrigerant charge, and nitrogen brazing are important. LG's Multi V i system uses R32 refrigerant, improved controls, service data, and higher capacity. Episode Highlights: [00:00] - Sponsor Ad: Factory Direct Filters [00:42] - Intro to Guest David Kim from LG in Part 1 [02:51] - VRF Education: Definition and Heat Recovery [05:17] - History of VRF: From Asia to North America [07:05] - How Modulation Works: Inverter Compressors & Electronic Expansion Valves (EEVs) [08:52] - Comparison: Mini-Split Metering vs. VRF Metering [10:08] - System Design & Sizing: Using LG's LATS HVAC Software [13:28] - Installation Best Practices: The Importance of Nitrogen Brazing [14:51] - Service Debate: Filter Dryers on VRF Systems (Temporary vs. Permanent) [17:02] - New Technology: Introducing the Multi V i (R32 Refrigerant & AI Features) [20:13] - Building Automation Integration and Modular Capacity This Episode is Kindly Sponsored by: Cintas: https://www.cintas.com/hvacknowitall Cool Air Products: https://www.coolairproducts.net/ Factory Direct Filters: https://www.factorydirectfilters.com/ SupplyHouse: https://www.supplyhouse.com/tm Use promo code HKIA5 to get 5% off your first order at Supplyhouse! Follow the Guest David Kim on: LinkedIn Profile: https://www.linkedin.com/in/david-kim-156b9878/ LinkedIn - LG Electronics: https://www.linkedin.com/company/lg-electronics/ <p d
- 1 weeks ago14 min
HVAC Business Growth Secrets: Hiring, Apprentices & Scaling Without Marketing - Cornelio Martinez
In this episode of the HVAC Know It All Business Edition Podcast, co-hosts Gary McCreadie and Furman Haynes from WorkHero sit down with Cornelio Martinez, Owner at Maize Mechanical, he shares the journey of building a successful HVAC business by focusing on relationships, strategic hiring, and long-term growth instead of chasing rapid expansion. He explains how partnerships, mentorship, and investing in apprentices helped him scale sustainably while navigating the challenges of staffing, sales, and business operations. The conversation also explores his vision for contractor co-ops, workforce development, and how small businesses can compete with large private equity-backed companies. Cornelio Martinez is an advocate for electrification, workforce development, and sustainable business growth. After starting as a subcontractor, he strategically grew his company through partnerships, mentorship, and investing in apprentices. Today, he's passionate about helping independent contractors build stronger businesses while creating more opportunities for the next generation of skilled trades professionals. Expect To Learn: Why strategic partnerships can accelerate business growth. How to know when it's time to hire employees instead of subcontractors. The pros and cons of using subcontractors versus building an in-house team. Why investing in apprentices creates long-term business stability. How transparency impacts customer sales conversations. The biggest financial lessons every growing contractor should understand. How contractor co-ops could help small HVAC businesses compete with larger organizations. Timestamps: 00:00 – Introduction 00:44 – When Is the Right Time to Hire Your Next Employee? 01:53 – Learning from Mentors and Building Strategic Partnerships 03:07 – Growing Through Relationships Instead of Marketing 03:34 – Subcontractors vs. Hiring Your Own Apprentices 04:08 – Why Investing in Employees Pays Off Long-Term 06:49 – Scaling Without Overextending Your Business 07:37 – Avoiding Technical Overload During Sales Conversations 08:59 – Selling with Logic, Emotion, and Trust 11:54 – Competing with Private Equity Through Collective Buying Power 12:38 – Streamlining Operations and Holding Contractors Accountable 13:54 – Final Thoughts Follow our Guest Cornelio Martinez: LinkedIn: https://www.linkedin.com/in/cornelio-martinez-38660b40/ Instagram: https://www.instagram.com/corneliomartinez/ Company Website: https://maizemechanical.com/ Company Facebook: https://web.facebook.com/people/Maize-Mechanical/61556354961579/# Follow Gary McCreadie: LinkedIn: https://www.linkedin.com/in/gary-mccreadie-38217a77/ <p dir="ltr" role="prese
- 1 weeks ago21 min
HVAC Troubleshooting Mindset for Technicians to Fix High Pressure Problems without Replacing Parts
In this episode of the HVAC Know It All Podcast, Host Gary McCreadie Director of Player Development and Head Coach at Shelburne Soccer Club and President of McCreadie HVAC & Refrigeration Services and HVAC Know It All Inc, shares a service call involving a Lennox rooftop unit that kept shutting down on high pressure. Gary explains how he checked the airflow, condenser, pressure switch, refrigerant pressures, contactor, filter drier, and TX valve while trying to find the restriction. He also describes how equalizing the system pressures and tapping the TX valve helped the unit start running again. The episode covers compressor pressure relief, microchannel coil limits, the use of a system lubricant, and the value of testing different solutions before replacing expensive parts. Gary discusses a difficult service call involving a Lennox rooftop unit that kept shutting down on high pressure. He explains how he checked the airflow, condenser fan, pressure switch, refrigerant pressures, contactor, filter drier, and TX valve while searching for the cause. The episode covers how equalizing the system pressures and tapping the TX valve helped the unit run again, along with compressor pressure relief, microchannel coil limits, system additives, and the importance of trying different tests before replacing costly parts. Expect to Learn: How a stuck TX valve can cause low suction pressure and high head pressure. Why checking airflow, fans, coils, and pressure switches should come before using gauges. How equalizing system pressures and tapping the TX valve helped restore cooling. Why compressor relief valves and contactors are important for system protection. How testing different solutions can prevent unnecessary and costly refrigeration repairs. Episode Highlights: [00:00] - Sponsor: Factory Direct Filters ad [01:33] - Intro: Service call overview & 30-year career context [03:22] - High pressure switch explained & rapid cycling issue [05:46] - Pressure differential theory & refrigerant logging in condenser [08:19] - Second visit: Zero low-side pressure, high-side off the charts [11:07] - Fix attempt: Equalizing pressure & smacking TX valve works [15:07] - Contactor replacement & SmartShot additive experiment [19:34] - Final lesson: Don't give up, try new approaches, learn from every call This Episode is Kindly Sponsored by: Cintas: https://www.cintas.com/hvacknowitall Cool Air Products: https://www.coolairproducts.net/ Factory Direct Filters: https://www.factorydirectfilters.com/ SupplyHouse: https://www.supplyhouse.com/tm Use promo code HKIA5 to get 5% off your first order at Supplyhouse! Follow the Host on: LinkedIn: https://www.linkedin.com/in/gary-mccreadie-38217a77/ Website: https://www.hvacknowitall.com LinkedIn - HVAC Know It All Inc.: https://www.linkedin.com/company/hvac-know-it-all-inc McCreadie HVAC & Refrigeration Services: https://www.linkedin.com/company/mccreadie-hvac-refrigeration-services/ <p dir="lt
- 1 weeks ago26 min
HVAC Mental Health: Men with Imposter Syndrome, Who Feel Not Good Enough to Build Confidence
In this episode of the HVAC Know It All Podcast, Host Gary McCreadie Director of Player Development and Head Coach at Shelburne Soccer Club and President of McCreadie HVAC & Refrigeration Services and HVAC Know It All Inc, continues the Mental Health Series with a personal discussion about imposter syndrome, emotional struggles, and the loneliness that can come with leadership and youth coaching. Gary explains how self-doubt can affect even hardworking and successful people, and why kind words can have a lasting impact on someone's day or life. He also shares lessons from coaching youth soccer, including the idea that leaders do not always have to be nice, but they should always be kind. He discusses accountability, support systems, and the importance of listening to people who may be struggling. Gary also encourages listeners to notice small wins, keep moving forward, and find someone to talk to when life feels lonely or difficult. This episode continues the Mental Health Series with a personal discussion about imposter syndrome, leadership, and the loneliness that can come with coaching and responsibility. Gary shares how self-doubt affects him even when others support his work, and explains how a simple kind message can improve someone's mood and outlook. He also discusses lessons from youth soccer, including the idea that leaders do not always have to be nice, but they should always be kind. Gary explains how accountability and understanding can work together when helping players, employees, or family members through difficult moments. The episode also explores the importance of support systems, noticing small wins, and finding someone to talk to when life feels lonely or overwhelming. Expect to Learn: How imposter syndrome can affect hardworking and successful people. Why kind words can improve someone's mood and outlook. How leaders can be firm while still showing care and understanding. Why coaching and leadership can sometimes feel lonely. How support systems and honest conversations can help during difficult times. Episode Highlights: [00:00] - Episode Intro: imposter syndrome & transformational coaching [03:17] - Mental health struggles: obstacles, and stats on male listeners [04:48] - Pushback against "mental health is fabricated" argument [06:22] - Imposter syndrome: feeling undeserving despite hard work [09:43] - Youth coaching & the transformational "player-first" approach [11:59] - "You don't always have to be nice, but you always have to be kind" [17:00] - The loneliness of coaching: invisible effort & lack of gratitude [22:32] - Finding little triumphs; don't get stuck in negativity or praise [25:13] - Importance of support systems; talking it out is therapeutic This Episode is Kindly Sponsored by: Cintas: https://www.cintas.com/hvacknowitall Cool Air Products: https://www.coolairproducts.net/ Factory Direct Filters: https://www.factorydirectfilters.com/ SupplyHouse: https://www.supplyhouse.com/tm Use promo code HKIA5 to get 5% off your first order at SupplyHouse! Follow the Host: LinkedIn: https://www.linkedin.com/in/gary-mccreadie-38217a77/ Website: https://www.hvacknowitall.com LinkedIn - HVAC Know It All Inc.: <a href= "https://www.linkedin.com/company/hvac-know-it-all-inc" t
- 2 weeks ago20 min
How to Build a Successful HVAC Business: Heat Pumps, Growth & Customer Trust with Cornelio Martinez
In this episode of the HVAC Know It All Business Edition Podcast, co-hosts Gary McCreadie and Furman Haynes from WorkHero sit down with Cornelio Martinez, Owner at Maize Mechanical, to discuss what it really takes to build a successful HVAC business from the ground up. Cornelio shares how he left the corporate world to protect his personal reputation, navigated launching a company during the COVID-19 pandemic, and strategically positioned his business around heat pumps and emerging technologies. The conversation explores business growth, networking, rebate programs, industry policy, and why intentional planning not advertising has fueled his company's success. After years working for large HVAC companies, Cornelio launched his own business with a focus on integrity, customer relationships, and delivering exceptional workmanship. Today, he leads a growing team specializing in heat pumps, home electrification, and high-performance HVAC systems while advocating for better collaboration between contractors, policymakers, and utility programs. Expect To Learn: Why Cornelio left the corporate world to build his own HVAC business How launching during COVID shaped his approach to business growth Why heat pumps became the foundation of his company's strategy The importance of staying ahead of industry trends and rebate programs Challenges contractors face with utility incentives and rebate administration How networking and relationships outperform traditional advertising Practical lessons for scaling an HVAC company through quality work and customer trust Timestamps: 00:00 - Introduction 00:57 - Why Protecting Your Reputation Matters More Than a Paycheck 03:40 - Starting an HVAC Business During the COVID-19 Pandemic 06:01 - Managing Cash Flow on Large Residential Projects 08:26 - The Heat Pump Project That Changed Everything 09:37 - Building a Business With Intention Instead of Reacting 13:17 - What Policymakers Need to Understand About Contractors 17:40 - Growing From a One-Person Shop to a Full Team 19:15 - Scaling an HVAC Business Through Quality and Trust Follow our guest Cornelio Martinez: LinkedIn: https://www.linkedin.com/in/cornelio-martinez-38660b40/ Instagram: https://www.instagram.com/corneliomartinez/ Company Website: https://maizemechanical.com/ Company Facebook: https://web.facebook.com/people/Maize-Mechanical/61556354961579/# Follow Gary McCreadie: LinkedIn: https://www.linkedin.com/in/gary-mccreadie-38217a77/ <
- 3 weeks ago18 min
Defrost Mistake That Sends Refrigeration into a Head Pressure Death Spiral - Julian Finbow Part 2
In this episode of the HVAC Know It All Podcast, host Gary McCreadie talks with Julian Finbow, RSE, Service Tech Support at Swegon North America, and Principal at Finbow Inc., about the different types of defrost methods used in commercial refrigeration systems. Julian explains how electric defrost, hot gas defrost, and cool gas defrost work, along with their advantages, challenges, and energy use. The conversation also covers defrost termination controls, mechanical and digital defrost time clocks, managing head pressure in large rack systems, and real service experiences showing how adjusting defrost schedules can improve temperature control and reduce frost buildup in refrigeration equipment. Gary and Julian discuss the different defrost methods used in commercial refrigeration systems and how each one affects performance and efficiency. Julian explains how electric defrost, hot gas defrost, and cool gas defrost work, along with their benefits and challenges. The conversation covers defrost termination controls, mechanical and digital defrost time clocks, the importance of head pressure during hot gas defrost, and real field examples showing how changing defrost schedules can improve temperature control and reduce frost buildup in refrigeration systems. Expect to Learn: How electric, hot gas, and cool gas defrost systems work in commercial refrigeration. Why defrost termination controls help improve efficiency and reduce unnecessary heating. How mechanical and digital defrost time clocks control refrigeration system operation. Why proper head pressure is important for reliable hot gas defrost in large systems. How adjusting defrost schedules can improve temperature control and reduce frost buildup. Episode Highlights: [00:00] - Sponsor: Factory Direct Filters ad [00:42] - Intro to Julian Finbow, RSE in Part 02 [02:27] - Electric Defrost: Pros, cons & common drain heater failures [06:38] - Defrost Types: Cool gas defrost & energy efficiency comparison [08:16] - Defrost Termination: Using sensors to end defrost early & save energy [11:56] - Head Pressure: Managing pressure during hot gas defrost in large systems [14:08] - Troubleshooting: Adjusting defrost cycles (4 to 6 shorter ones) to fix temperature spikes [17:02] - Increasing defrost cycles to fix -40°F freezer issue; closing This Episode is Kindly Sponsored by: Cintas: https://www.cintas.com/hvacknowitall Cool Air Products: https://www.coolairproducts.net/ Factory Direct Filters: https://www.factorydirectfilters.com/ SupplyHouse: https://www.supplyhouse.com/tm Use promo code HKIA5 to get 5% off your first order at Supplyhouse! Follow the Guest Julian Finbow, RSE on: LinkedIn Profile: https://www.linkedin.com/in/julian-finbow-rse-1048038b/ LinkedIn - Swegon North America: https://www.linkedin.com/company/swegon-north-america/ LinkedIn - Finbow Inc.: https://www.linkedin.com/company/finbow-inc/ Website - Swegon North America: http://www.swegonnorthamerica.com/ <s
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