In this episode of the HVAC Know It All Podcast, host Gary McCreadie chats with John Ellis, a Product Ambassador at Dust Free, LP, an Instructor at Amana/Goodman/Dakin, and a Field Service Trainer at The New Flat Rate, Inc. He also owns Dynamic Air Consulting. He talks about indoor air quality and its key factors. John explains how thermal comfort, humidity control, ventilation, filtration, building pressures, and pollutant control are all linked. He highlights the importance of adjusting these factors based on the climate and type of building. John also talks about the impact of infiltration and stresses the need for accurate ventilation design to maintain a healthy indoor environment and avoid problems like air pressure imbalances. John talks about the importance of indoor air quality and the six key factors that affect it: thermal comfort, humidity, ventilation, filtration, building pressures, and pollutant control. He explains how these factors change depending on the climate and type of home. John also shares tips on designing HVAC systems to balance ventilation and humidity, using the right filters, and controlling air pressure. He emphasizes how understanding these factors helps improve comfort, prevent issues, and create healthier indoor environments. This episode covers key indoor air quality principles, with practical advice on improving comfort and safety. John talks about managing thermal comfort, humidity, ventilation, and filtration, while also focusing on building pressures and pollutant control. He shares tips on how HVAC pros can design systems for better air quality and prevent common issues. Expect to Learn: Why indoor air quality is key to comfort and safety. How thermal comfort, humidity, and ventilation affect air quality. Why balancing building pressures is important for HVAC systems. Tips for managing pollutants and controlling ventilation. Understanding these factors helps improve indoor environments. Episode Highlights: [00:00] - Intro to John Ellis Part 01 [02:04] - John's Take on Indoor Air Quality & Key Principles [07:07] - Thermal Comfort & Dehumidification [09:33] - Ventilation & Building Pressures [14:53] - High-Rise Ventilation and Dehumidification [17:06] - Thermal Comfort and Mean Radiant Temperature [19:15] - Stratification & Ceiling Fans This Episode is Kindly Sponsored by: Master: https://www.master.ca/ Cintas: https://www.cintas.com/ Cool Air Products: https://www.coolairproducts.net/ property.com: https://mccreadie.property.com SupplyHouse: https://www.supplyhouse.com/tm Use promo code HKIA5 to get 5% off your first order at Supplyhouse! Follow the Guest John Ellis on: LinkedIn: https://www.linkedin.com/in/john-ellis-b13b0411/ Dust Free, LP: https://www.linkedin.com/company/dust-free-lp-/ The New Flat Rate, Inc.: https://www.linkedin.com/company/the-new-flat-rate-inc-/  Follow the Host: 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/ 

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