What are the three types of ducts

The three types of ducts are round, rectangular, and oval. The round type is the most common and is used for air distribution in HVAC systems due to its cost-effectiveness and straightforward installation. Rectangular ducts are more efficient than round ones as far as air flow is concerned, and can be installed in small spaces or around obstacles with minimal disruption. Oval ducts provide even better airflow efficiency than rectangular ones due to their unique shape; such ducts can be used in commercial or large industrial applications with high heat loads or long runs of ductwork.


Ducts are a component of air conditioning and heating systems found in homes and businesses. They are ducts of metal or fiber glass used to carry heated or cooled air from the central unit to each room. Ducts also return air from each room back to the unit. Ducts come in three main types, which depend on the application: flexible, semi-rigid, and rigid.

Flexible ducting is lightweight, low cost, and easy to install. It’s often used as the main supply lines in residential systems due to its flexibility in getting around tight turns and corners. Semi-rigid ducting is more durable than flexible ducting but can still bend around tight turns. Rigid ducting is made from aluminum or galvanized steel; it usually comes in large sections because it needs seams for turning corners. This type of ducting works best for larger areas such as industrial applications because it’s not susceptible to mechanical damage like other types of ducts can be.

What are the Three Types of Ducts?

There are three primary types of ducts used in HVAC systems. These include air supply ducts, return air ducts, and exhaust air ducts.

Air Supply Ducts: Air supply ducts are the ones that send conditioned air from the seresto collar cats furnace or air conditioner throughout the home. The warm/cold air is delivered through vents that draw the conditioned airflow into different rooms.

Return Air Ducts: On the flip side, return air ducts are responsible for bringing the stale or humid indoor air back to be filtered or cooled/warmed once more in its respective HVAC unit. It’s important to ensure these ducts remain clean and clear of obstacles so they can function properly.

Exhaust Air Ducts: Lastly, exhaust air ducts releases excess hot temperatures that have been produced within an area (such as a kitchen) through an exterior wall opening so it won’t be recirculated throughout other areas of a home. This helps keep temperatures regulated inside your home and makes sure any hazardous contaminants don’t get into living spaces either.

etal Ducts

Metal ducts are the most common type of ducts and are made from sheet metal. They are used in both domestic and commercial buildings where air needs to be recirculated, such as an HVAC system. As their name suggests, they are made from galvanized steel or aluminum which provides durability and protection from corrosion. Metal ducts can either be rigid or flexible, depending on their use.

Rigid metal ducts are often used for long runs since they provide a solid connection between different components without any leakage. Flexible metal ducts have rolled joints which allow them to connect different pipes with ease. In addition, they can be installed quickly as no special equipment is required for installation; a few screws will do the job!

on-Metal Ducts

On-Metal Ducts are popular in many industrial settings, due to their ability to handle high temperatures and remain airtight. They are composed of a heavy gauge steel core and bonded with an inner lining of up to 25 mm thick. The solid construction ensures the duct is strong and won’t bend, therefore ensuring that it seals properly when connected and won’t let outside air into the ducting system.

The heavy gauge steel core also helps on-metal ducts with insulation safety and fire prevention measures as well as noise reduction, depending on the material used for the core. On-metal ducts help reduce potential dust contamination from outside sources as well, since they can be sealed tightly to prevent dust particles from entering.

lexible Air Ducts

Flexible air ducts are the most common type of ducting used today and are typically made from an insulated aluminum wall. Flexible air ducts offer greater flexibility than rigid air ducts, making them easy to install in difficult locations or to snake around a variety of obstacles. They are available in a range of sizes allowing for a wide range of airflow levels.

These flexible ducts are suitable for most domestic or commercial applications although they may need some additional support when running long distance. Steel straps must be used to secure the air conduit in such cases. Additionally, it’s important not to crush flexible model as this will compress its fibers and reduce airflow.

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