Uploaded September 2025 | Updated September 2026, 3 weeks ago
Join Chris Hughes from The Energy Conservatory and Adam Mufich from National Comfort Institute as they tackle one of the HVAC industry's most challenging topics: properly commissioning inverter-based equipment. Drawing from their extensive field experience and months of research, they address the confidence gap that many technicians face when working with variable-speed systems.
What You'll Learn:
The fundamental differences between traditional single/two-stage systems and modern inverter equipment
Essential pre-commissioning requirements including outdoor temperature (65-100°F) and indoor temperature (73-80°F) ranges
Equipment-specific considerations for different brands, tonnages, and control types
Proper charging methods and the critical 20-minute stabilization period
How to access test/commissioning modes across various manufacturers
Why "just turn the thermostat down to 60°" doesn't work with inverters
Key Takeaways:
The presenters reveal a major industry problem: inconsistent and often incomplete commissioning information from manufacturers. They share their solution - a comprehensive spreadsheet compiled over months of research that provides startup instructions and commissioning details for nearly every inverter brand on the market.
The Challenge: Unlike traditional systems where technicians could confidently know a system was at 100% capacity, inverter systems require specific knowledge of how to properly test compressor speed, indoor fan operation, and outdoor fan modulation - information that's often scattered across multiple manuals or hidden behind dealer portals.
This presentation is essential viewing for any HVAC technician working with modern equipment who wants to move beyond guesswork and return to confident, thorough system commissioning.
Find out more at: hvacrschool.com/symposium
Read all the tech tips, take the quizzes, and find our handy calculators at hvacrschool.com or the HVAC School Mobile App on the Google Play Store (hvacrschool.com/play-store) or App Store (hvacrschool.com/app-store).
Join Chris Hughes from The Energy Conservatory and Adam Mufich from National Comfort Institute as they tackle one of the HVAC industry's most challenging topics: properly commissioning inverter-based equipment. Drawing from their extensive field experience and months of research, they address the confidence gap that many technicians face when working with variable-speed systems.
What You'll Learn:
The fundamental differences between traditional single/two-stage systems and modern inverter equipment
Essential pre-commissioning requirements including outdoor temperature (65-100°F) and indoor temperature (73-80°F) ranges
Equipment-specific considerations for different brands, tonnages, and control types
Proper charging methods and the critical 20-minute stabilization period
How to access test/commissioning modes across various manufacturers
Why "just turn the thermostat down to 60°" doesn't work with inverters
Key Takeaways:
The presenters reveal a major industry problem: inconsistent and often incomplete commissioning information from manufacturers. They share their solution - a comprehensive spreadsheet compiled over months of research that provides startup instructions and commissioning details for nearly every inverter brand on the market.
The Challenge: Unlike traditional systems where technicians could confidently know a system was at 100% capacity, inverter systems require specific knowledge of how to properly test compressor speed, indoor fan operation, and outdoor fan modulation - information that's often scattered across multiple manuals or hidden behind dealer portals.
This presentation is essential viewing for any HVAC technician working with modern equipment who wants to move beyond guesswork and return to confident, thorough system commissioning.
Find out more at: hvacrschool.com/symposium
Read all the tech tips, take the quizzes, and find our handy calculators at hvacrschool.com or the HVAC School Mobile App on the Google Play Store (hvacrschool.com/play-store) or App Store (hvacrschool.com/app-store).
