To maintain warranty and insurance validity, TR-6 typically recommends a maintenance schedule:
: You can purchase the digital PDF or hard copy directly from the BESA Publications store . besa tr6 pdf
Historically, earlier versions of ductwork specifications carried designations like . Over time, this was superseded by DW/144 (first published in 1983 and revised in 1998 and more recently updated as DW/194 for rectangular ducts). However, many industry veterans and older tender documents still refer to the "TR6 standard." To maintain warranty and insurance validity, TR-6 typically
If you want, I can run a live web search for "besa tr6 pdf" and summarize available PDFs I find. To maintain warranty and insurance validity