Helical ducting is a thin-walled, round tube made by rolling metal strip into a spiral seam, primarily used in HVAC (Heating, Ventilation, and Air Conditioning) systems. The material is predominantly galvanized steel, but can also be made from stainless steel, copper, aluminum, color steel, and micro-perforated steel sheets, among others, for various applications.

Advantages:

One: Airtightness

Each straight pipe is made from a single sheet of metal, ensuring excellent airtightness.

2. During spiral duct installation, there are fewer connections between pipes. The typical length of a round duct is 3-6 meters, while the rectangular duct is only 1-1.16 meters. Under certain conditions, the round duct can be longer.

Connecting two ducts requires only one joint, while rectangular ducts necessitate two completely separate flange systems to connect.

Supplies:

1. In the same cross-sectional area, the perimeter of a rectangular duct is 13% longer than that of a circular duct. For a rectangular duct with a length-to-width ratio of 1:2, the perimeter is 20% greater than that of a circular duct, 30% greater for a ratio of 1:3, and 41% greater for a ratio of 1:4. Therefore, the materials used for the manufacturing and the sealant and insulation during installation of circular ducts are less than those for rectangular ducts. 2. For the same insulation effect, circular ducts can use thinner insulation materials compared to rectangular ducts. They can also utilize lower density insulation layers. 3. The number and dimensions of the hanging brackets can be reduced. The distance between rectangular duct hanging brackets is 2.5M, while for circular ducts, it is 3M. 4. The superior structural characteristics of circular ducts fully permit the use of thinner materials for processing under the same conditions.

The circular duct piping systems are standardized, and due to the standardized dimensions, the complete range of fittings and joints can be pre-manufactured. The connection of circular ducts is straightforward, requiring only one person to install a single circular duct, whereas rectangular ducts typically necessitate at least two people.

Four, the frictional loss of round ducts is smaller than that of rectangular ducts. This is due to the significantly reduced air flow resistance of spiral ducts and their accessories, as well as their high airtightness. Therefore, when selecting fans, the required motor power is greatly reduced, thereby lowering the daily operation costs of the system and the initial investment in fans.