Galvanized Spiral Ducts SPR | Class D Spiro Ducting
SPR
Galvanized Spiral Ducts (Spiro Ducting) – SPR Series
The SPR series of galvanized spiral ducts, commonly known as Spiro ducting, is the foundational component for the vast majority of modern ventilation and air conditioning systems. Engineered for performance and durability, these ducts are manufactured in an extensive range of diameters from 80 mm to 1600 mm. Their spiral-lock seam construction provides exceptional rigidity, making them the workhorse for everything from small residential projects to large-scale industrial installations.
Crucially, all SPR galvanized ducts meet the stringent requirements for air tightness Class D according to EN 12237, ensuring maximum system efficiency and performance.
Key Features & Benefits for Installers, Engineers, and Investors
Certified Class D Air Tightness: This top-tier rating ensures minimal air leakage across the ductwork. For the investor, this means lower operating costs due to energy savings. For the technician, it guarantees the system will perform as designed.
Enhanced Rigidity with Corrugation: To ensure structural integrity, especially in larger systems or those with negative pressure, ducts with a diameter of Ø250 mm and greater are reinforced with standard external corrugations (ribs), preventing deformation.
TÜV Rheinland Certified Quality: This certification provides a third-party assurance of consistent manufacturing quality, material standards, and product safety, offering peace of mind to architects and building owners.
Unmatched Versatility: With a massive diameter range and various available sheet thicknesses (0.4 mm to 1.2 mm), the SPR series can be precisely specified for any airflow requirement and structural challenge.
Comprehensive Material Selection: While galvanized steel is the standard, the SPR platform includes a full range of materials like stainless steel and aluminium for specialized applications.
Construction & Material Options
The SPR series offers a wide variety of materials to suit diverse project requirements, well beyond standard applications.
Material options and applications for the SPR series spiral ducts
Product Code
Material
Key Feature / Application
SPR-C-...
Galvanized Steel
The industry standard for all general-purpose HVAC systems.
SPR-Z-...
Z275 Galvanized Steel
Heavier zinc coating for enhanced corrosion protection.
SPR-K-...
1.4301/304 or 1.4404/316L Stainless Steel
For corrosive, humid, or hygienic environments (e.g., kitchens, pools).
