Air duct construction, fittings & industrial engineering
Coolenvi™ supplies precision-manufactured air duct components, fittings and special construction solutions for modern ventilation and ducting systems. The range includes standardised and custom solutions for building services, industrial applications, process air systems, data centres, clean rooms and energy-efficient HVAC systems. In addition, components for industrial applications, containment trays for media and groundwater protection, and metal construction solutions ensure safe, airtight and standards-compliant media handling.
Comparison of Airtightness Classes for Air Duct Systems
| DIN EN 16798-3 | DIN EN 13779 | Leakage Formula (l/s·m²) |
Example +500 Pa |
Example −500 Pa |
Example +1,000 Pa |
Example −1,000 Pa |
|---|---|---|---|---|---|---|
| ATC 5 | A (Standard) | 0.027 × p0.65 | 1.53 | 1.53 | 2.41 | 2.41 |
| ATC 4 | B (Recommended) | 0.009 × p0.65 | 0.51 | 0.51 | 0.80 | 0.80 |
| ATC 3 | C (Special applications) | 0.003 × p0.65 | 0.17 | 0.17 | 0.27 | 0.27 |
| ATC 2 | D (Grease-tight, watertight) | 0.001 × p0.65 | 0.06 | 0.06 | 0.09 | 0.09 |
| ATC 1 | – | 0.00033 × p0.65 | 0.02 | 0.02 | 0.03 | 0.03 |
Note: Leakage rates apply equally to positive and negative pressure testing. The absolute value of test pressure p [Pa] is decisive. Actual test pressures are project-specific. Prices are only valid for orders placed as an XML file.
Select now the right category for your Air Duct System
Installation and Fixing Materials
All essential components for professional installation – from screws and nuts to brackets, anchors and fixing systems.
Condensate Drainage
Efficient solutions for safe and clean condensate removal.
Air Ducts and Special Components
Hygienic ventilation ducts in rectangular and accessories.
Straight Air Ducts for your Systems
Here you find straight air ducts as the base for efficient air distribution systems. Fittings such as bends and transitions are shown in the next section.
Fittings for Air Duct Systems
Here you find essential fittings such as bends, tees, reducers and transitions for complete air duct installations. These components ensure flexible routing and efficient airflow distribution.
Straight Spiral Ducts for Your Ventilation System
Here you find straight spiral ducts as the foundation for efficient air distribution systems. Fittings such as elbows, branches and reducers are shown in the next section.
Content: 5 lm (R 334,64* / 1 lm)
Content: 5 lm (R 772,68* / 1 lm)
Content: 5 lm (R 114,68* / 1 lm)
Round Fittings for Spiral Duct Systems
Here you find round duct fittings including elbows, branches, reducers and additional accessories for spiral duct systems. Designed for quick, airtight installation in ventilation and air conditioning systems.
Custom Air Duct Modifications & Special Fabrication
Here you find custom-made ductwork solutions and workshop modifications tailored to project-specific requirements. We adapt dimensions, connections and system layouts according to customer needs for optimal HVAC performance.
Insulation for Ductworks
Premium insulation materials are essential to prevent condensation, energy loss, and system inefficiencies. Here you can browse a selection of diffusion-proof pipe insulation and suitable accessories.
Content: 10 lm (R 183,09* / 1 lm)
Content: 17 lm (R 107,70* / 1 lm)
Content: 15 lm (R 122,06* / 1 lm)
Content: 40 lm (R 45,78* / 1 lm)
Content: 23 lm (R 84,78* / 1 lm)
Content: 18 lm (R 108,33* / 1 lm)
Complete Air Duct System Overview
Here you find the full range of air duct components including straight ducts, fittings and custom fabrication parts. Select the right category to configure your complete HVAC system.
Content: 5 lm (R 114,68* / 1 lm)
Content: 5 lm (R 122,20* / 1 lm)
Content: 5 lm (R 156,04* / 1 lm)
Content: 5 lm (R 197,40* / 1 lm)
Content: 5 lm (R 214,32* / 1 lm)
Content: 5 lm (R 253,80* / 1 lm)
Content: 5 lm (R 278,24* / 1 lm)
Content: 5 lm (R 334,64* / 1 lm)
Content: 5 lm (R 340,28* / 1 lm)
Content: 5 lm (R 454,96* / 1 lm)
Content: 5 lm (R 485,04* / 1 lm)
Content: 5 lm (R 680,56* / 1 lm)
Content: 5 lm (R 772,68* / 1 lm)