Rectangular Duct Cable Suspension

A company called Griplock Systems has released new hardware for hanging rectangular air ducts using cables instead of the traditional threaded metal rods. The products, called Boot Grippers and Strut Grippers, attach to ductwork or to metal framing (strut) and let installers adjust the height and level of the ducts by hand, without tools. The system is verified under SMACNA TRI, an industry testing standard for duct suspension.

For a homeowner, this isn't something you'd shop for directly — it's equipment contractors use during installation, not a product you'd choose or request by name. The practical upshot is that if your home gets new ductwork installed, whether for a renovation, a new HVAC system, or a heat pump retrofit, the crew doing the work may use cable-based hangers like these instead of the older rod-and-bracket method. The maker says this approach can speed up installation and cut down on the number of parts needed, which in theory could mean less labor time and fewer separate pieces to install in your attic, basement, or crawlspace.

There's no cost, rebate, or program tied to this announcement, and it doesn't affect your home's energy efficiency or eligibility for any incentives. It's simply a new tool option in the contractor's toolbox for duct work, included here mainly as background if you're curious about how ductwork gets hung during a project at your house.