The following instructions assume you are installing an official version (either from an ASHRAE CD or from a trusted digital copy of Version 5.0/6.0).
If you are upgrading from an even older release, be aware that Version 5.0 modified dozens of fittings. The changes involve codes in the families . For example, CD3‑9, CD3‑16, ED1‑4, ER1‑2, SD1‑2, SR1‑1, and many more were updated [7†L32-L38][9†L24-L32]. The following instructions assume you are installing an
Designers utilize the precise pressure drop values to balance parallel duct branches, minimizing the need for energy-wasting balancing dampers. The following instructions assume you are installing an