07/17/2019
Why it is critical to follow NEBB/TABB procedural standards for system readiness to balance. It’s not just to provide accurate results to your customer. But it also helps protect your professional reputation as well.
I am sure your familiar with a pressure independent variable volume systems. Which are typically utilized in various applications as well as build outs. This is were at least one system can handle an entire floor. Or it can handle a riser duct to various floors of a multi story building.
As you know It’s not untypical for a project scope to consist of only balancing a handful of terminal units on a exiting system, with numerous terminal units installed. Typical issues we observe are lost communication, sensor location, missing outlets or dampers, diversity of air volume etc.
Last Friday we were requested to perform a test and balance on a space as referenced above. However there were no ceiling tiles installed at time of our site visit. So we walked the site and check communications to terminals and that the air distribution was installed per the mechanical plans.
After walk thru, we rescheduled for the following Tuesday when all ceiling tiles and some other items were completed. There appeared to be no problems on the floor with comfort and/or airflow.
After the ceiling tiles were installed, an existing issue was revealed.
The problem was an inadequate return path. The resolution was the engineer of record reviewed and called for additional transfer ducts to be installed. The air pattern was very erratic and per the Facility manager this has been problematic for multiple years.
As I stated on the importance of procedural standards. Imagine not just the results of TAB report, when the building owner revealed issue and pass it up the chain for a resolution.
Right There is where the reputation takes a hit.
Goes back what one of my mentors repeated: “Standards are not recommendations in test and balance. It is a systematic process which is not based on speed, but rather accuracy and repeatability of measurements” H. Grimes
FYI “ the ceiling tiles were not installed” is not a arguable excuse....
Just not a lot of defense for your test and balance report, when you fail to follow the initial procedures by cutting corners to get done and meet budget. Just imagine all of the unmeasurable items that get past.
Point blank, can’t buy back your name.
Food for thought. 😎