Any employer who sends people to a training course will get an almost immediate payback. In this field, you can't afford not to change and keep up with technology. Yes, and it's important. For recent graduates, it shows that they have a specialty. For Facilities Engineers, it is a tool that demonstrates knowledge in the field.
Certification enhances both salaries and careers.
Most will need to be upgraded in the upcoming decade, and there is a huge shortage of people who are expert in the new technologies . There is a wide range of salaries, depending on if one is a contractor, an engineer, facility engineer, etc. However, if someone is knowledgeable about both HVAC and DDC , they will command a premium on the average salary. It combines both engineering skills and people skills. Without it, for example, there would be no food in supermarkets, no open-heart surgery, no cancer research.