Spiral Group Logo
Round Ductwork System Image

Spiral Round Ductwork System

Rectangular Ductwork System Image

Rectangular Ductwork System

Grilles and Diffusers Image

Grilles and Diffusers

Ductwork Accessories Image

Duct Accessories & Services


Spiral Round Ductwork System

Material Savings - Our spiral lock seam is self-reinforcing, making it lightweight, so you can save on duct hangers.

Manpower Savings - Lighter weight means our spiral ducts are easier to install, that result to lower labor cost.

Energy Savings - We can produce Spiral Ducts with maximum length of 9.0 meters, meaning the possibility of air leak factor for your ducting is greatly lessen.

Better Indoor Air Quality - Since round ducts have no corners, the accumulated dust inside the ducting system will be very minimal.

Beautiful - Our spiral duct system is aesthetically pleasing. We stitch weld our round duct fittings with low fusion process that makes look nice without burn marks, that makes look nice and prevent corrosion.

SMACNA and Eurovent Standards - Conforms to the local and international standards set forth by the world's top HVAC organizations.

Round Ductwork System

Round Ducts

Round Fittings


TDC Rectangular Ductwork System

Strong and Rigid - Combining Transverse Duct Connections(TDC) with our latest "Z-bead" profile sheets translates to ducts with less vibration.

Consistent Quality - Our duct fittings use CNC plasma cut parts and are machine fabricated, resulting to products with higher precision and standards.

Faster Delivery - We utilize German automated coil line technology that incorporate multiple fabrication processes into just one operation to increase our rectangular duct production capacity.

High Quality Raw Materials - We use standard gauge materials to create products with better durability.

Rectangular Ductwork System

Rectangular Duct

Rectangular Fittings


Air Terminals

CNC Machine Pressed - Our CNC benders gives our products the smooth even folds and exact angles that is consistent throughout.

Profile Uniformity - Likewise, our CNC shears measure and cut out the precise dimensions for every part of our grilles and diffusers all the time.

Oven Baked Painting - Visually pleasing automative lacquer enamel finish to make sure your grilles' or diffusers' beauty does not fade over time.

Made-to-Order Sizes - Give us a measurement, and we shall comply and custom fabricate according to your exact specifications.

Grilles and Diffusers

Plenum Boxes

Grilles & Diffusers


Other Products And Services

Spiral Group Inc.provides total HVAC Ducting Solutions, plus other services that may complement your needs.

  • Corner Angles
  • TDC Clips
  • "ZEE" Bars
  • Bolts and Nuts
  • Neoprene Gaskets

  • Laser & CNC Plasma Cutting Services
  • Coil Slitting Services
  • C & Z Purlins
  • Sheet Metal Fabrication

Accessories and Services


Duct Accessories



Spiral Group, Inc.

About the company - We have been providing air distribution systems for the HVAC industry in the Philippines since 1997. A proud pioneer and market innovator, we are a dedicated duct manufacturer in the country that can supply all ducting requirements such as Round Ducts & Fittings, Rectangular Ducts & Fittings, Air Terminals, and Accessories of our valued contractors and end user: from ducting for A/C units, ventilation, exhaust systems, void formers for civil works, dust and particle collection, to interior design. Our products conform to the standards of SMACNA and EUROVENT.

With the superiority of our technology, complemented by our highly trained people and support from our European counterparts, Spiral Group Inc. commits to provide only the best to its clients:



To be the leading company in HVAC ducting solutions in the Philippines.


To provide the best air distribution systems to our clients through Innovation, Service, and Dedication to Excellence.


Contact Us

For faster inquiry and information, please contact us at:
Phone Number: 8285-9033 | 8285-4633
Telefax: 8285-3133
Globe: 0917-838-3133 | Sun: 0933-530-2600

Map to Spiral Group, Inc.