The Webasto Air System is a comprehensive air ducting solution for marine air conditioning systems such as BlueCool A- and C-Series.
Key features:
- Cflex and EasyDuct flexible insulated ducts in 102, 127, and 152 mm diameters
- Isosleeve insulation sleeves for added thermal efficiency
- Extra silent ducts with sound-absorbing inner layer and up to 80°C temperature resistance
- Oval ducts and transitions for tight installations
- Air outlets available in aluminum (black, white, brown) and wood finishes like teak and mahogany
This system ensures efficient airflow, quiet operation, and easy installation, even in compact yacht interiors.
Installation Guidelines for Air Ducts and Grilles (Webasto)
- To ensure acceptable noise levels at maximum blower speed, the following guidelines for grille sizing, ductwork, and transition boxes should be followed:
- Supply air grilles: Ensure sufficient free cross-section to prevent blower overload and excessive noise. The size of the plenum box (transition box) behind the grille is also critical.
- Ducting dimensions: Choose the proper diameter and keep duct paths smooth. Avoid sharp 90-degree bends directly from the blower outlet.
- Avoid direct bends: Do not use flexible ducting in a 90-degree bend immediately after the blower – this causes severe airflow restriction.
- Adjustable blower outlets: All WB blowers (except for 24,000 BTU/h models) can be rotated in 45-degree increments. This allows for a straight-line air outlet, which should be used whenever possible.
- Avoid grille facing the evaporator coil: Do not position the return air grille directly opposite the finned coil surface of the air handler – this would allow blower motor noise to pass straight through.
- Offset positioning recommended: Position the grille in such a way that return air must flow around a corner (chicane-style) before reaching the coil. This significantly reduces direct noise propagation.
- Flexible ducting: Use high-quality hoses with strong steel spiral reinforcement to prevent collapse. Always fully extend flexible ducting to achieve the smoothest possible inner surface.
- For long duct runs: Prefer smooth-bore ducting (e.g. in PVC) for reduced internal friction and improved airflow. Use insulated ducting for longer runs to avoid condensation on the outside of the duct.
- Short runs: For short sections, non-insulated ducting can be used without issues.
Large luxury vessels often have stricter air distribution and noise control requirements than standard installations. Customized engineering recommendations for these applications can be provided by Webasto upon request.
