Description
It can be easy to pull out equations like q = 1.08 CFM ΔT and q = 500 gpm ΔT as soon as we see a problem involving air-side or hydronic loads.
However, the PE Exam is designed to test whether you truly understand the concepts behind these rules-of-thumb by throwing atypical elevations or particularly hot or cold temperatures at you on exam day.
Unfortunately, using rules-of-thumb on atypical conditions leads to getting questions wrong on the exam. However, deriving the correct coefficients takes up a ton of time on exam day.
For this reason, we have pre-derived these coefficients for you.
For example, by using this resource on exam day you can rapidly translate a particularly cold airflow condition across a heating coil to q = 1.22 CFM ΔT, which allows you to keep flying through the exam without wasting time deriving bespoke equations while time is of the essence.
