Refrigeration Frost vs Ice Truths for HVAC Techs to Prevent System Failure - Julian Finbow Part 1
About this episode
Gary McCreadie and Julian Finbow discuss refrigeration defrost methods and their importance for system performance.
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…
People in this episode
Host: Gary McCreadie
Guest: Julian Finbow
Topics covered
- refrigeration
- defrost methods
- system performance
- frost buildup
- hot gas defrost
- HVAC
Keywords
- refrigeration
- defrost
- frost
- evaporator coils
- hot gas defrost
- HVAC
- system design
Mentioned in this episode
Organizations: Swegon North America, Finbow Inc.
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