NEBB Procedural Standards, Specifications, and Report Forms
The procedure is the deliverable
The NEBB procedural standard defines how a certified firm plans, executes, and documents balancing work. It requires a pre-balance verification: equipment installed and operable, drives aligned, filters and access doors in place, controls functional, and the system clean enough to test. Deficiencies found at this stage are documented and issued before balancing proceeds, because the technician cannot compensate for construction defects by adjusting dampers.
Contract documents govern. The specification sets tolerances, required instruments, report formats, and whether a preliminary report and final report are both required. Where the specification and the standard differ, the more stringent requirement normally prevails; note any deviation and obtain written approval rather than silently resolving it.
Reports typically include system descriptions, design versus measured values for every device, instrument lists with calibration dates, ambient conditions, deficiency and exception logs, and a signed certification statement. Preliminary reports give the contractor a chance to correct items; the final report reflects verified, as-balanced conditions. Field data sheets should be legible, initialed, dated, and traceable back to raw readings so any number can be reconstructed.
Traps that appear in questions
Applying a tolerance to the wrong level (total system versus individual terminal); omitting density or altitude corrections so reported cfm is wrong; failing to re-test after a contractor changes a damper or sheave; and signing off without noting unresolved deficiencies.
Rule of thumb
If a measured value falls outside the specification tolerance and cannot be corrected, it belongs in the exception log with the reason, not in a footnote.