Craig Migliaccio Archives

Craig Migliaccio

Company name: AC Service Tech LLC

Position: Founder and Owner

Craig Migliaccio is an educator who runs the AC Service Tech website and YouTube channel. He is also the author of Refrigerant Charging and Service Procedures for Air Conditioning and its workbooks. He has recently published another book, Inverter Mini Split Operation and Service Procedures.

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Inverter Mini Split Operation and Testing

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.

Dr. Allison Bailes from Energy Vanguard joins the podcast to answer the age-old question: do houses need to breathe? He also talks about his new book, A House Needs to Breathe… Or Does It? You can purchase that book directly through the Energy Vanguard site at https://energyvanguardstore.com/ or on Amazon.

HVAC professionals can benefit from learning about building science because there is a lot of overlap between the two, and an HVAC technician who knows about building science can set themselves apart in the market.

In short, Dr. Bailes doesn’t think a house needs to “breathe,” especially if a house brings in low-quality air, especially humid air, through gaps and cracks. Some people also use the term “breathe” differently; some may be referring to leakiness, and others may refer to drying out a house. It is necessary for a house to be dry, but we want to make sure that fresh air is controlled.

If you build a home tightly, you have to ventilate it correctly. We have to control air, liquid water, water vapor, and heat. Heat is especially complicated, as it has three different ways of moving and can come in sensitive and latent varieties. One way of controlling those is through control layers like vapor barriers, though these aren’t always needed; we must understand the vapor flow to determine if a vapor barrier is necessary.

Dr. Bailes and Bryan also discuss: