Hey Ed, What Is the Difference Between Taking Static Pressure Measurements on a New Versus Existing System?

In this edition of "Hey Ed", Ed discusses the difference between taking static pressure measurements on a new versus existing system

Hey Ed, what is the difference between taking static pressure measurements on a new versus existing system? This is possibly one of my favorite topics right now, if your ticket static pressure readings on a brand new system, it’s going to replicate what was measured in the factory when the blower cables are produced, if you have an existing system it's quite possible that we're going to have a dirty blower wheel, a dirty filter whatever in the system could be dirty and when we compare those static pressure readings to the blower cable, it's not a fair comparison. The other part of that is generally a low number would be an indication of a good duct system, if you have a dirty coil, a dirty blower wheel that can replicate those numbers that appear to be a good system because they’re low and it would be essentially a false positive is the way I would describe it, so when it comes to using static pressure measurements to estimate airflow, everything has to be cleaned and that's the way I see it.

In this edition of “Hey Ed”, Ed discusses the difference between taking static pressure measurements on a new versus existing system