Flexible Ducts Flexible ducts should be joined by a metal sleeve, collar, coupling, or coupling system. All holes, rips, and seams must be sealed with mastic or approved tape. After mechanically attaching the register boot to floor, wall, or ceiling, all openings between the boot and floor, wall, or ceiling should be sealed with caulk, mastic, or butyl-adhesive tape. For systems with thermostatic expansion valves use the subcooling method. The following are testing requirements and procedures that must be followed to ensure that the HVAC system has been properly installed.
Static pressure is correct.
The material in this fact sheet was developed by ConSol, Inc. and is public domain.