What are the different types of ductwork?

There are three types of duct systems. Namely, flexible ductwork, rigid ductwork, and semi-rigid ductwork. We’ve compiled information on each of these duct systems. These ducts are typically tube-shaped and made of a wire coil covered with a bendable, durable plastic, and surrounded by insulation.

What kind of ductwork is best?

Flexible ductwork is the best type of ductwork to use in tight or awkward spaces where rigid ductwork would be too difficult to install. Because these air ducts are flexible, they can bend around fixed structures to work in almost any space.

What are the three types of ducts?

There are three main types of ducting used within domestic ventilation systems: rigid ducting, semi-rigid ducting and flexible ducting.

What is the most efficient ductwork?

For instance, round duct is the more efficient shape in terms of material use, resistance to airflow, and air leakage. “The tradeoff is that round duct will not always fit in the space provided. In these cases the duct is converted to rectangular or flat-oval so that it can fit the available space.

What is the most commonly used ductwork in an HVAC residential system?


Made of galvanized steel or aluminum, rigid sheet metal is the most common type of ductwork. The thick, solid wall makes the duct very durable.

Which type of duct is normally preferred in air conditioning?

fiberboard air duct

A fiberboard air duct is mostly preferred for heating and cooling systems because it is insulated.

Should you replace old ductwork?

If your ductwork is over 15 years old, you probably should replace it. Ductwork has a maximum lifespan of 20-25 years. By 15 years, however, it begins to deteriorate, significantly reducing your HVAC system’s efficiency, so replacement is the prudent option.”

Is metal ductwork better than Flex?

Flex ducts are better for existing trunk-and-branch heating and cooling systems. This is because they’re more versatile and flexible. Metal ducts are more rigid due to the nature of steel, making them ideal to build an entire HVAC system.

Is insulated ducting better?

Ductwork insulation ensures that air traveling through the duct system will stay at the desired temperature and won’t “leak” out. Leaking air results in unnecessary energy loss, which means that your HVAC system will have to work even harder.

Is round ductwork better than rectangular?

In many ways, round metal duct work is more economical than rectangular metal duct work as a means of conveying air. 1) Size: For a given pressure loss, the surface area of rectangular duct can be double the comparable round duct surface area. Round duct, therefore, requires less metal than rectangular equivalents.

What is the most energy efficient shape of duct?

Round Round ducts

Round. Round ducts are the most efficient in transporting air. They use less material than rectangular ducts to handle the same amount of air.

How can I make my air ducts more efficient?

Duct insulation will further reduce the loss of heat (or cold, for A/C) through your ducts, improving the overall efficiency of your HVAC system. Choose your insulation. Foil-backed fiberglass bats are a cost-effective option. As long as the insulation is heat-resistant, and rated at least R-6, you’re good to go.

Is duct sealing worth it?

If you have leaky ducts, duct sealing is definitely worth it because it leads to benefits such as: Increased energy efficiency. Improved indoor comfort. Healthier air quality.

What is the disadvantage in having ducts in the ceiling?

Cons of ceiling vents

Exposes HVAC system to unconditioned spaces – Attics tend to be dusty and prone to extreme temperatures, which can add wear-and-tear on the equipment and increase heat transfer loss.

Can you put insulation around ductwork?

Batt insulation – For an affordable solution, foil-backed fiberglass or cotton batt insulation can be cut to size, fit around your ducts and taped into place. Foil-backed self-adhesive foam – This type works especially well for irregularly shaped ducts. Simply wrap it around the ducts and press it into place.

How is ductwork installed?

Quote from the video:
Quote from Youtube video: Always install flex duct in as straight a run as possible flexible duct should be supported at least every five feet it can be supported with a variety of hanger straps.

How do I stop condensation in my air ducts?

Wrapping your AC ductwork is an effective way to prevent condensation. Duct wrap has a foam insulation inner layer and a foil outer layer. Cleanly wrap it around the AC duct and fasten with duct tape near the joints.

Should you insulate ductwork in attic?

When HVAC ducts are installed in a vented attic in a dry climate, bury the ducts in attic insulation to protect them from temperature extremes in the unconditioned attic space. Install ductwork so that it is in direct contact with (i.e., laying on) the ceiling and/or truss lower cords.

Should an attic be cold in the winter?

Your attic temperature should be at or near the outside air temperature if it is well ventilated and does not leak warm air into the attic from below. At the moment the attic floor is properly insulated, and has a 3/4 plywood floor on top of that.

Is it better to have HVAC in basement or attic?

In summer months, the AC airflow temperatures will be considerably lower (cooler) for systems located in a basement or crawlspace, when compared with HVAC systems located in vented attics.