How to Insulate Air Ducts & Ventilation Shafts in Boats & Vessels

Engine noise from air ducts and ventilation shafts
Air ducts and ventilation shafts are needed to dissipate heat or supply cool air to and from the engine room. Especially in large vessels these air shafts are enormous noise leaks. The amount of noise from those shafts can be a huge problem on board of a vessel and its direct surroundings. To reduce engine noise a sound absorber needs to be installed inside the air ducts or ventilation shafts.

How to insulate air ducts and air shaft in vessels?
Small air ducts, round in shape, are easy to insulate by the use of the Inno Dampers. These dampers are made of an acoustic foam that absorbs airflow and engine noise. Inno Dampers have removable plugs to adjust the airflow. We advise to remove all plugs from the dampers for optimal airflow and still have sufficient noise insulation. Place two Inno Dampers in the air duct with a space of about 10 cm between the two. Make sure the dampers can’t get wet or to moist since there are made of foam.

Large commercial shipping vessels have huge air- and ventilation shafts to ventilate engine rooms, these shafts produce lots of noise. To insulate noise from such shafts the whole inside should be insulated with a sound absorber. We recommend a acoustic product with a moisture proof top layer, Acousticcell PU or Flamex PU. The difference being the more heat resistant acoustic foam which is the basis of Flamex PU. Acousticcell PU can absorb more low engine noise since this product is 51 mm thick. Therefore, we recommend Acousticcell PU. We also recommend use PU Finishing Tape for masking seams between two sheets. This prevents the intrusion of moisture or dirt.

Products to insulate the air ducts and ventilation shaft in boats and vessels

Insulating air ducts & ventilation shafts in vessels