Spiral duct, also known as spiral round duct or spiral pipe, is a type of HVAC (Heating, Ventilation, and Air Conditioning) ductwork commonly used in commercial and industrial applications. It is characterized by its spiral, cylindrical shape, which gives it superior strength and structural integrity compared to other types of ducts.

Here are some key features and characteristics of spiral ducts:

Construction:

A spiral duct is typically made of galvanized steel or stainless steel. Galvanized steel ducts are coated with a layer of zinc to protect against corrosion, while stainless steel ducts are highly resistant to corrosion and are suitable for applications where cleanliness and hygiene are crucial.

Spiral Design:

The spiral design of the duct consists of a continuous helical seam that runs along its length. This design provides excellent rigidity and prevents leakage, making spiral ducts more efficient and reliable compared to rectangular or square ducts.

Strength and Durability:

The spiral shape of the duct contributes to its strength, allowing it to resist pressure, vibration, and external forces. It can handle higher air pressures without deforming or collapsing, making it ideal for systems that require high airflow volumes.

Airflow Efficiency:

The smooth interior surface of the spiral duct minimizes air resistance, reducing pressure drop and optimizing the efficiency of air distribution. This can result in lower energy consumption and improved overall system performance.

Easy Installation:

Spiral duct is relatively easy to install due to its lightweight nature and simple assembly process. It can be easily transported to the installation site and requires fewer joints compared to rectangular ductwork. The duct sections are typically joined using specially designed connectors and seals.

Versatility:

The spiral duct is suitable for a wide range of HVAC applications, including supply air distribution, exhaust systems, ventilation, and dust collection. Its versatility allows it to be used in various settings such as commercial buildings, industrial facilities, warehouses, and institutions.

Acoustic Properties:

Spiral ducts can be lined with insulation material to provide sound attenuation, reducing the transmission of noise generated by the HVAC system. This makes it beneficial for applications where noise control is important, such as in offices, schools, and healthcare facilities.

The table below shows the latest retail July 2023 prices of Spiral Duct, in Philippines Peso price per piece including its standard length and size

Price and Standard Size of Spiral Duct per Meter in the Philippines

UPDATED: Construction Material Prices for Spiral Duct in the Philippines (July 2023)

UPDATED: All Construction Prices are based on retail prices around hardware in Metro Manila

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