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#sequence of operations

Tech Tips:

The Heating Sequence of Operations and Onions

Just like Shrek, I like to think about the heating sequence of operations as an onion—it has layers. And each layer builds upon the previous one. We have written previously in great detail about gas furnaces, from top to bottom. I want to focus today on why there is a sequence of operations and how […]

HVAC Education. What NOT to Do w/ Jim F., Roman B. and Craig M.

Join Roman Baugh, Craig Migliaccio (AC Service Tech), and Jim Fultz for an unfiltered conversation about training mistakes, teaching pitfalls, and educational failures in the HVAC industry. Recorded live at the 7th Annual HVAC/R Training Symposium, this candid discussion reveals what experienced educators wish they knew when they started. Learn from their mistakes so […]

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How to Evacuate an AC system, Full Vacuum Procedure

Our latest Podcast

HVAC School – For Techs, By Techs

Real training for HVAC ( Heating, Ventilation, Air Conditioning and Refrigeration) Technicians. Including recorded tech training, interviews, diagnostics and general conversations about the trade.

In this short podcast episode, Bryan and Roman talk about Florida law and how it relates to the “M-word” (mold) and the legal boundaries our techs must respect when they communicate with customers. HVAC School and Kalos are NOT mold experts, but we have experience as HVAC professionals who encounter suspicious microbial growth in our market (and cannot diagnose or remediate mold).

We cannot use the word “mold” because “mold” MUST be diagnosed by a certified mold assessor via laboratory testing according to Florida law. A guess based on sight does NOT qualify as a diagnosis; it is the equivalent of diagnosing a compressor failure as acid contamination without a test that proves the presence of acid. Residential property owners, however, are allowed to identify, remediate, and speak freely about mold in their own homes (which Roman can do because he hired mold assessors and remediators in his home).

Florida limits HVAC contractors from diagnosing mold (or removing more than 10 contiguous square feet while removing, maintaining, or installing equipment) to prevent scare tactics in sales, such as by diagnosing “toxic mold” in a drain, or to sweep larger problems under the rug. There are also many different mold types that have specific characteristics that can only be identified by an assessor; HVAC contractors are not trained to recognize those. However, mold is part of our work whenever we clean coils, HVAC units distribute air (which contains mold spores from outside), and we manage moisture (which contributes to fungal growth).

Mold assessors also have specific diagnostic tools and send lab samples. HVAC contractors don’t have those resources, training, or certification. As HVAC contractors, need to be educated on mold, but we also need to understand our limitations; we can’t diagnose it or make decisions for customers.

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The Florida “M-Word” – Legal Boundaries & Tech Communication – Short #299

08/18/2026

Bryan Orr - A/C Trainer

Becoming a GRIT Host or Mentor w/ Leilani

08/13/2026

Bryan Orr