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Using Heat & Nitrogen In Vacuum

In these tips and on the podcast, we talk a lot about the importance of deep vacuum. Pulling a deep vacuum using proper

Start Flowing Nitrogen Sooner

My technician (and brother-in-law), Bert, made a good point. (It's hard for me to admit it, but it's true.) When he need

Sweeping with Nitrogen

Two days prior to this article being published, I sent one out about the popular fallacy that nitrogen “absorbs

Does Air or Nitrogen Absorb Water?

There are many examples of teaching using metaphors to help someone grasp how something works without being EXACTLY corr

How (and Why) to Flow Nitrogen While Brazing

When I started in the trade, the idea of flowing nitrogen while brazing was nothing more than the punchline of a joke. L

Non-Bleed TXV & Trapped Nitrogen

The following is based on a true story. No product was harmed in the making of this tech tip, and some facts may have ch

Triple Evacuation and Nitrogen FACTS

This article was written by longtime contributor and RSES CM Jeremy Smith. Thanks, Jeremy! Nitrogen doesn’t absorb moist

Does Nitrogen Pressure Change with Temperature – Practical Application of Gas Laws

The gas laws. We all learned about them in school and promptly forgot all about them. I really think that we need to dig

Living in a World of Acids (and why HVAC coils are secretly crying for help)

Whether we realize it or not, we’re surrounded by acids. They’re in the air we breathe, the cleaning products we use, an

What is a HSO (Non-Bleed) TXV/TEV?

There is a lot of misunderstanding about the HSO (hard shut-off) or “non-bleed” TXV (thermostat expansion va

Not All CFM Are Created Equal

We’re in the business of moving heat, but we have to move air to accomplish that. We use CFM (cubic feet per minute) to

Brazing in TXVs: Best Practices

This is a quick tip from the “Expansion Valves – What Does and Doesn't Matter?” livestream on our YouTube channel