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Author: Tong Ngo

Technical Service Manager • North Georgia
Technical Services

It’s important to keep HVAC Tools Calibrated

Tong NgoFebruary 11, 2026February 11, 2026

…and not just for the “by-the-book reasons Here’s why it matters in the real world:  Accurate diagnostics – Gauges, thermometers, manometers,…

Technical Services

The Importance of Reading the Installation Manual Before Installing HVAC Equipment

Tong NgoJanuary 13, 2026January 13, 2026

Installing heating, ventilation, and air conditioning (HVAC) systems require precision, knowledge, and attention to detail. While many technicians rely on…

Technical Services

Changing Celsius to Fahrenheit on Mini-Split 

Tong NgoNovember 19, 2024November 19, 2024

Have you ever installed a mini-split and after commissioning, the wall control is showing the temperature in Celsius instead of…

Technical Services

Updating Your SMAN/Testo Gauges

Tong NgoOctober 17, 2024October 17, 2024

Some of you might have an older SMAN/Testo digital gauge.  With the new refrigerants coming, you might need to update…

Technical Services

Ductless Commission/Testing In Heat Mode

Tong NgoSeptember 17, 2024September 17, 2024

Have you ever installed a mini split in the summertime? During the commission the AC would work well, but in…

Technical Services

Aluminum Fin Surface Oxidation On Air-Cooling Coils

Tong NgoAugust 12, 2024August 12, 2024

Have you ever received a call from a customer about “white flakes,” dust, or particles blowing out of ductwork in…

Technical Services

Introduction to Duct Design & Static Tips

Tong NgoJuly 12, 2024July 12, 2024

What all goes into “duct design”? Most important is having a balanced system, meaning what comes in (return) must go…

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