Term: ductwork
ductwork (noun): a system of ducts (tubes or channels) used to move air for heating, ventilation, and air conditioning (HVAC) throughout a building.
synonyms: air ducts, ventilation system, conduits.
pronunciation: /ˈdʌkt.wɜːk/
translation: gaisvadu sistēma, ventilācijas caurules
example: The office was too hot because the ductwork was poorly insulated and leaking cool air into the attic.
Components and Materials
Ductwork is the “arteries” of a building’s climate control system. It can be made from several different materials depending on the need for durability or flexibility.
| Material | Description | Common Use |
| Galvanized Steel | Rigid metal ducts; very durable and smooth for airflow. | Main trunks in residential and commercial buildings. |
| Flexible Duct | Tube-shaped wire coil covered in plastic; easy to install in tight spaces. | Connecting rigid ducts to individual room vents. |
| Fiberglass Duct Board | Rigid boards with built-in insulation. | Used where sound dampening and temperature control are priorities. |
How It Works
Ductwork operates on a “supply and return” cycle:
- Supply Ducts: Carry conditioned air (heated or cooled) from the HVAC unit to the rooms.
- Return Ducts: Pull air from the rooms back to the unit to be filtered and re-conditioned.
Common Issues
- Leaks: Holes or loose connections can waste up to 30% of energy.
- Poor Insulation: Causes air to lose its temperature before it reaches the room.
- Blockages: Dust, debris, or even pests can restrict airflow, making the system work harder.
Fun Fact: Duct Tape
Despite its name, traditional silver “duct tape” is actually not recommended for sealing ductwork because the adhesive dries out too quickly under constant temperature changes. Professionals use foil tape or mastic sealant instead.