Arkansas HVACR NewsMagazine March 2025

HVACR NewsMagazine March 2025

Tech News

After taking the measurements, we enter them into the sheet:

Some very simple math shows that we have 10 degrees of superheat.

Conclusion

Even though we now have digital probes and apps that will give us these figures instantly, I have found that being able to work these problems out on paper gives me a more holistic understanding of what is going on in an HVAC system. Instead of superheat and subcooling being just numbers on a screen, they are now data that we can interpret. For example, low superheat may be the result of an airflow restriction or the system being overcharged while high superheat may be due to a clogged filter drier or the system being undercharged.

This article was furnished by the generosity of Bryan Orr, HVAC School by Techs for Techs. We encourage you to subscribe to their podcast and articles at https://hvacrschool.com/

— JD Kelly