HVAC Techs - If you are studying for your EPA 608 Exam, you just learned what the pressure-temperature chart is. Now you are going to use it.

Select a temperature, read the pressures, and then run through the field scenarios. These are real situations — the mislabeled system, the contaminated charge, the running system that throws off your reading. Every one of them shows up on the exam. Every one of them shows up on the job.

This is not a quiz. There are no wrong clicks. Just use it until the numbers start feeling familiar — because when you are standing in front of a system with your gauges hooked up and the readings do not match, you need to know what that means without thinking twice.

That is what this is for.