Duct Parts

Duct parts keep HVAC systems breathing efficiently by connecting, directing, sealing, and balancing airflow from the air handler to every register. This directory highlights components like elbows, wyes, tees, reducers, collars, takeoffs, boots, and plenums that build the backbone of supply and return runs. Find manual balancing dampers, zone and backdraft dampers for comfort control and protection, plus fire dampers where code requires. Explore registers, grilles, and diffusers for quiet, even distribution, along with vibration isolators to reduce noise. Improve performance and indoor air quality with UL 181 mastics and foil tapes that cut leakage, access doors for cleanouts, and hangers and straps that support ductwork correctly. Whether you’re tuning static pressure, boosting CFM, or reducing energy bills, the right duct fittings and accessories make a measurable difference.

Choose from galvanized steel, aluminum, stainless, duct board, PVC, and flex duct parts in common round and rectangular sizes. Transitions and offsets help navigate tight framing while maintaining smooth airflow. Insulated sleeves and higher R-value components limit heat gain and loss in attics, basements, and crawlspaces. You’ll also find parts suited to furnaces, air conditioners, heat pumps, ERVs/HRVs, bath fans, and range hoods, with options for residential and light commercial jobs.

Quick selection tips:
- Match size and shape to design CFM and target static pressure.
- Use mastic plus UL-rated foil tape; avoid cloth “duct tape” on HVAC runs.
- Support metal duct every 10 feet and flex every 4 feet; minimize flex kinks and sharp bends.
- Install three sheet-metal screws per round joint before sealing.
- Add balancing dampers near takeoffs to fine-tune rooms without choking grilles.
- Choose code-compliant fire and smoke components for rated assemblies.

Browse reliable duct parts to tighten systems, cut leakage, quiet airflow, and deliver consistent comfort—backed by durable materials that stand up to heat, humidity, and service.