Flexible Self-Extinguishing Ventilation Hose Ø80 mm – Heat-Resistant Engine Duct

This corrugated ventilation hose Ø80 mm is specially designed for the safe removal of air, heat, and fumes from your boat’s engine compartment. Its large diameter provides a high flow rate, which is necessary for effective engine ventilation and bilge airflow, preventing the dangerous accumulation of fuel vapors under the deck. Using this hose during pre-start ventilation and while running the engine helps lower the compartment temperature and supplies the engine with ample oxygen for combustion.

The hose is made from a special compound with excellent thermal resistance – it withstands continuous temperatures up to 130°C. This means it can carry hot air from a running engine or heater without softening, cracking, or failing. Additionally, the material is self-extinguishing (flame-retardant), which is critical: in the event of ignition of vapors, the hose will not fuel the fire. This property makes it compliant with marine safety standards (e.g., ISO 9097 / ISO 8846) that require flame-resistant components in motorboat ventilation systems.

The hose’s construction is highly flexible, with an embedded metal wire helix running throughout its length. This spiral reinforcement gives it strength – the hose maintains its round shape and won’t collapse under suction when a blower fan pulls air through it. It also withstands vibrations and shocks common in engine rooms without cracking or tearing. The corrugated exterior allows it to bend easily at various angles, which is extremely useful when routing through bulkheads and around equipment – you can snake it through complex paths without needing extra elbow fittings. Typically, the hose is supplied in bulk (e.g., 10 m rolls) or by the meter, meaning you can order exactly the length you need and cut it easily with scissors or a knife to fit your installation. The ends of the hose attach to blowers or vent fittings using clamps (hose clamps) to ensure a tight seal.

Use Cases and Recommendations:

• Designed to connect to 12V marine bilge blowers, installed in engine compartments. The hose carries gasoline and diesel vapors from the low point of the bilge to an outlet overboard, helping ventilate the area before engine start (an important safety step to prevent explosions).
• Ideal for ventilating engines on motorboats, power cruisers, and sailing yachts with inboard engines – it ensures hot air around the engine is drawn out and fresh cool air can enter, thereby extending equipment life and improving combustion efficiency.
• Can also be used for general air circulation in enclosed areas on the vessel that require a flame-proof solution – for example, battery compartments or bilges with fuel tanks. In these cases, the hose acts as a safe conduit for exhausting explosive gases or providing ventilation to the space.
• Recommended for upgrades and refits: if you are replacing an old ventilation hose or adding a new blower, choose this self-extinguishing hose to bring your boat up to current safety standards. It meets ABYC and NMMA guidelines for nonflammable ducting in engine spaces.
• The hose is usually sold in a coil (e.g., 10 m) or by the meter – cut the length you need and keep any extra for future repairs. Make sure to secure the hose firmly to all connectors with appropriate stainless steel clamps to prevent loose connections or any leakage of fumes in the compartment.