HVAC Duct & Fittings

HVAC Duct & Fittings connect your heating and cooling equipment to every room, moving air efficiently, quietly, and safely. This directory section highlights components and tools that help you design, install, repair, and upgrade residential or commercial ductwork for better airflow, comfort, and energy savings.

You’ll find rigid round and rectangular duct, insulated flex duct, and duct board, plus sheet metal fittings that shape and balance airflow: elbows, wyes, tees, reducers, transitions, takeoffs, starting collars, boots, plenums, and end caps. Add airflow control with balancing dampers and backdraft dampers, and finish with registers and grilles matched to your CFM needs. For tight, durable assemblies, stock up on S-cleats, drive cleats, flanges, gaskets, UL 181 foil tape, mastic, zip screws, pop rivets, and access doors. Mount and protect runs with hangers, supports, vibration isolators, insulation (R-6/R-8), and vapor barriers.

Installation and fabrication tools include aviation snips, seamers, hand brakes, benders, duct crimpers, swaging tools, Pittsburgh lock tools, hole saws, drill/drivers, and rivet guns. These make cutting, forming, and joining sheet metal faster and more precise, reducing static pressure and noise by keeping transitions smooth and airtight.

Practical tips:
- Size ductwork using ACCA Manual D to hit target CFM and keep total external static pressure in range.
- Favor long-radius elbows and gentle transitions to reduce turbulence.
- Seal every seam with mastic or UL 181 foil tape; test for leakage to boost efficiency and IAQ.
- Support ducts per SMACNA spacing and insulate runs in unconditioned spaces.
- Choose materials for the application: galvanized steel or aluminum for durability, duct board for thermal performance, and PVC/ABS where code allows for exhaust.
- Observe fire and smoke codes, including fire-rated collars and barriers where required.

With the right HVAC duct and fittings, you can balance rooms, lower energy bills, extend equipment life, and pass inspections with confidence—all while delivering quieter, cleaner, and more consistent heating and cooling.