『HVAC Know It All Podcast』のカバーアート

HVAC Know It All Podcast

HVAC Know It All Podcast

著者： Gary McCreadie - Licensed Refrigeration/HVAC Technician
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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.2025 出世 就職活動 経済学
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  • Defrost Mistake That Sends Refrigeration into a Head Pressure Death Spiral - Julian Finbow Part 2

    Defrost Mistake That Sends Refrigeration into a Head Pressure Death Spiral - Julian Finbow Part 2
    2026/07/09
    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/ 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: https://www.facebook.com/people/HVAC-Know-It-All-2/615679643061429/ Instagram: https://www.instagram.com/hvacknowitall1/ Follow the Podcast on: YouTube: https://www.youtube.com/@HVACKnowItAll Spotify: https://open.spotify.com/show/6LCBJGw0EHG03rdWHxUMce Apple Podcast: https://podcasts.apple.com/us/podcast/hvac-know-it-all-podcast/id1359253455
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    19 分
  • HVAC Owners Who Don't Use A Whole Home Approach Are Losing Profit - Brynn Cooksey Sr, CEM, CMS

    HVAC Owners Who Don't Use A Whole Home Approach Are Losing Profit - Brynn Cooksey Sr, CEM, CMS
    2026/07/08
    In this episode of the HVAC Know It All Business Edition Podcast, co-hosts Gary McCreadie and Furman Haynes from WorkHero sit down with Brynn Cooksey Sr, CEM, CMS. He is the Founder of Air Doctors Heating & Cooling and HVAC U (Building Scientists). He discuss the business side of home performance contracting and explains how contractors can build highly profitable businesses by focusing on diagnostics, customer education, and measurable results. The discussion explores customer qualification, maintenance retention, team training, operational systems, and the financial benefits of delivering complete solutions instead of simple equipment replacements. Brynn also shares practical advice for business owners looking to scale their companies through better processes, stronger customer relationships, and a commitment to quality. Brynn a leading training organization focused on HVAC, building science, and home performance. With experience in both utilities and contracting, Brynn has become a respected educator and industry leader, helping thousands of contractors improve their technical knowledge, business operations, and customer outcomes through data-driven solutions. Expect To Learn: - Why not every homeowner is the right customer for your business - How home performance testing creates trust and supports premium pricing - The connection between quality installations, customer retention, and referrals - How Brynn trains employees to embrace building science principles - Why bigger-ticket projects can improve profitability and efficiency - The role of processes, CRMs, and administrative systems in scaling a business - Key hiring and financial lessons for contractors looking to grow sustainably Timestamps: 00:00 - Introduction 00:55 - Finding the Right Customers for Long-Term Success 02:10 - Building Customer Loyalty That Lasts for Generations 05:47 - Turning Expertise Into a Repeatable Business Model 08:08 - Creating a Training Culture That Scales 09:59 - Building Processes That Make Quality Consistent 10:33 - Why Bigger Tickets Create Better Business Outcomes 12:37 - Unlocking Revenue Beyond Equipment Replacement 13:19 - The Hidden Cost of Oversized Equipment 17:56 - Financial Lessons Every Contractor Needs to Learn 18:47 - Closing Thoughts Follow our Guest Brynn Cooksey Sr, CEM, CMS: LinkedIn: https://www.linkedin.com/in/theairdoctor/ Instagram: https://www.instagram.com/theairdoctor313/ Company LinkedIn: Air Doctors Heating & Cooling: https://www.linkedin.com/company/airdoctorshvacservice/ HVAC U (Building Scientists): https://www.linkedin.com/company/hvac-ubuildingscientists/ Company Website: Air Doctors Heating & Cooling: https://www.airdoctorshvacservice.com/ HVAC U (Building Scientists): https://www.hvactrain.com/ Company Instagram: Air Doctors Heating & Cooling: https://www.instagram.com/airdoctorshvac HVAC U (Building Scientists): https://www.instagram.com/hvac_university Follow Gary McCreadie: LinkedIn: https://www.linkedin.com/in/gary-mccreadie-38217a77/ Website: https://www.hvacknowitall.com Facebook: https://www.facebook.com/people/HVAC-Know-It-All-2/61569643061429/ Instagram: https://www.instagram.com/hvacknowitall1/ Follow Furman Haynes: LinkedIn: https://www.linkedin.com/in/furmanhaynes/ WorkHero: https://www.linkedin.com/company/workherohvac/ Instagram: https://www.instagram.com/workhero__/
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    20 分
  • Refrigeration Frost vs Ice Truths for HVAC Techs to Prevent System Failure - Julian Finbow Part 1

    Refrigeration Frost vs Ice Truths for HVAC Techs to Prevent System Failure - Julian Finbow Part 1
    2026/07/07
    In this episode of the HVAC Know It All Podcast, host Gary McCreadie is joined by Julian Finbow, RSE, Service Tech Support at Swegon North America, and Principal at Finbow Inc., to discuss refrigeration defrost methods and why they are essential for system performance. Julian explains how frost forms on evaporator coils, the difference between normal frost and ice buildup, and why proper defrost timing is important. The conversation covers common defrost methods such as hot gas, electric, off cycle, and off time defrost, along with how humidity, door openings, and evaporator placement affect frost buildup. Gary and Julian also explore hot gas defrost, its benefits, its challenges, and why proper system design and operation are critical for reliable refrigeration performance. In this conversation, Julian explains why defrost is needed in refrigeration systems and how frost forms on evaporator coils when they operate below freezing temperatures. He discusses the difference between normal frost, hoar frost, and ice buildup, and why proper defrost timing is important for good system performance. Julian and Gary explore topics such as off cycle, off time, electric, cool gas, and hot gas defrost, along with how humidity, door openings, and evaporator placement affect frost buildup. They also discuss how hot gas defrost works, its benefits and challenges, and why proper system design and defrost settings help keep refrigeration systems running efficiently. Expect to Learn: Why defrost is needed in refrigeration systems and how frost forms on evaporator coils. The difference between hoar frost, normal frost, and ice buildup, and why it matters. How off cycle, off time, electric, cool gas, and hot gas defrost methods work. How humidity, door openings, and evaporator placement affect frost buildup and defrost needs. The benefits and challenges of hot gas defrost, and why proper defrost timing improves system performance. Episode Highlights: [00:00] - Sponsor Ad: Factory Direct Filters [00:42] - Intro to Julian Finbow, RSE in Part 1 [02:37] - Recap of Ammonia Plant Tour & Social Media Success [04:12] - Julian's Background & Expertise [05:48] - Defining Defrost in Refrigeration vs. Heat Pumps [08:02] - Normal Frost vs. Problematic Ice on Coils [10:55] - Standard Defrost Cycles: 4 Times a Day [16:10] - Defrost on Walk-in Coolers & Mitigation Strategies [18:26] - 5 Main Types of Defrost Explained [21:33] - How Hot Gas Defrost Works (Pros & Cons) 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/ Follow the Host on: LinkedIn: https://www.linkedin.com/in/gary-mccreadie-38217a77/ Website: https://www.hvacknowitall.com Facebook: https://www.facebook.com/people/HVAC-Know-It-All-2/61569643061429/ Instagram: https://www.instagram.com/hvacknowitall1/ Follow the Podcast on: YouTube: https://www.youtube.com/@HVACKnowItAll Spotify: https://open.spotify.com/show/6LCBJGw0EHG03rdWHxUMce Apple Podcast: https://podcasts.apple.com/us/podcast/hvac-know-it-all-podcast/id1359253455
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    25 分
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