Videos

In today’s live stream, Eric Mele and Bryan talk about dehumidification and reheat on the residential and commercial sides of the HVAC industry. Recently, Eric diagnosed a commercial RTU that wasn’t reaching the set dew point. In the hydronic system that Eric troubleshot, the analog output was flipped; it ran the valve for reheat in […]

proper system airflow You can learn more about the 2022 HVACR Training Symposium HERE. While Manual J deals with residential load calculations, Manual S deals with residential equipment selection. The equipment’s goal should be to maintain 70 degrees in the winter and 75 degrees in the summer (with a 62-degree WB). These are not Manual […]

You can find the long-line piping guide we’ve used HERE. Long lines can cause refrigerant migration. Long lines simply move more refrigerant, making migration much more likely. On top of that, a pressure drop is possible throughout longer suction lines. When you have a lot of refrigerant inside the suction line when a unit is […]

Many problems that occur during installations stem from poor duct design. Ductwork requires a lot more thought and planning than just using ACCA Manual D. Duct sizing is important, and HVAC systems often lose efficiency to takeoffs and return drops that are too small; Michael and Neil like to make the ductwork as large as […]

Ed has over 35 years of HVACR experience, both in the field and through teaching. He has lived and done business in New Jersey, which has a variable climate, and he has experienced a wide range of temperatures. When designing ductwork, we obviously want our static pressure to be close to our calculations. However, lower […]

In this class, Bryan teaches the Kalos techs about breakers, wires, fuses, and overloads. The practices associated with these components can be a bit controversial in the HVAC industry, so we look at these through the lens of NFPA 70 (National Electrical Code/NEC). The wire sizing guide can be found in NEC 310.15 Table B-16, […]

Mindset In today’s live stream, Eric Mele, Chad, Corey, and Bryan cover the mindset, steps, and best practices required for HVAC installation. Chad and Corey are some Kalos apprentices who have done quite a few HVAC/R installations over the past few years. When approaching an installation, allow yourself enough time to understand the full scope […]

Impact of airflow In this class, Bryan teaches the Kalos techs about airflow and how it impacts system performance. He explains the factors that affect airflow and how those contribute to the overall state of an HVAC system. We use training equipment and MeasureQuick to demonstrate these concepts. On a typical no-cooling call, many techs […]

Techs often make mistakes when stripping wires. When you strip a wire by wringing it with your stripper’s jaws, you can nick the wiring. Generally, you’ll want to make a small split in the casing and gently use your wire stripper to pull back on a conductor you won’t use. That way, the casing will […]