HVAC Ductwork
Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
Showing changes from Rev 6
to Rev 7
in HVAC Ductwork.
---
title: HVAC Ductwork
…97 unchanged lines
- "Operation and maintenance data for dampers"
- "Warranty documentation"
−default: [Leakage test reports (signed, with calibration dates), Damper schedule as-built, Operation and maintenance data for dampers, Warranty documentation]
+default:
+ - "Leakage test reports (signed, with calibration dates)"
+ - "Damper schedule as-built"
+ - "Operation and maintenance data for dampers"
+ - "Warranty documentation"
```
…310 unchanged lines
# Fittings {toc}
−## General Requirements {toc}
+## All fittings, including elbows, tees, wyes, offsets, transitions, and boot connections, shall be fabricated from the same material and at least the same gauge as the adjoining straight duct, at the declared pressure class.
−### All fittings, including elbows, tees, wyes, offsets, transitions, and boot connections, shall be fabricated from the same material and at least the same gauge as the adjoining straight duct, at the declared pressure class.
+## Fittings fabricated from lighter gauge sheet than the straight duct are a common field substitution and are not acceptable because they create the weakest points in the system at the locations of highest turbulence and dynamic pressure. {note}
−### Fittings fabricated from lighter gauge sheet than the straight duct are a common field substitution and are not acceptable because they create the weakest points in the system at the locations of highest turbulence and dynamic pressure. {note}
−
## Rectangular Elbows {toc}
…823 unchanged lines
## The Contractor shall maintain access to all tested duct sections throughout the warranty period by keeping access doors clear of finishes, equipment, and storage.