Flowing nitrogen while brazing and pressurizing with nitrogen are great practices. Putting nitrogen in with the refrigerant? Not so much. Nitrogen is a “non-condensable” gas because it cannot be condensed (under normal conditions). However, nitrogen is just one of the non-condensables. First, let's talk about what a non-condensable gas is. Any gas that does […]

We had a really great conversation on the HVAC School Facebook Group about some belt tension best practices. It turns out that even a lot of really smart and experienced techs are not aware of all the factors related to belt tensioning. Myth #1 is that amperage is used to set belt tension. Now, don't […]

Whether you’re putting an A/C unit in a new home or doing a retrofit, installation jobs make up a pretty big chunk of residential HVAC work.  Installation can be hard work, and there’s a lot more to it than throwing a unit together and making sure it starts up. When you consider building design, ductwork, […]