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December 24, 2025
Refrigeration Cycle Explained: AC System Basics for HVAC Technicians
Master the fundamentals of the refrigeration cycle in this comprehensive training video. Every aspect of how an AC system operates is explained in detail, providing essential basics that every HVAC technician needs for proper diagnostics and service. Whether you're new to the field or need a refresher, this video breaks down the core concepts that are critical for technicians working with air conditioning systems daily.
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This article detailing the three steps to deliver a trades education talk was written by David Richardson from NCI. David is an excellent educator with lots of public speaking experience under his belt, and he has shared some great tips to help people share their valuable trade knowledge. If you have any questions for him […]
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There have been many adaptations of A Christmas Carol over the years, but it all started with a novella written by Charles Dickens in the 1840s. It was early in the Victorian Era, fresh off the heels of the Industrial Revolution. The British were reflecting on past Christmas traditions, like caroling, and exploring new ones […]
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Since heat pumps work by extracting heat from the outdoors to bring it inside, the outdoor coil will almost surely freeze up. To mitigate the freezing, heat pumps enter a defrost cycle in which they run in cooling mode to send hot, high-pressure refrigerant back through the outdoor coil and melt the ice. While the […]
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