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If the application environment is corrosive, chemically contaminated or moisture-laden then FRP fiberglass fans are best to ensure the longevity & less downtime.
Marine & Ship Ventilation Equipment
The Marine industry demands a level of reliability that only the highest quality HVAC equipment can provide.
Environments involving high moisture, salt water, corrosives, high heat and heavy vibration, and in many cases – all at the same time. These are all elements that require not only heavy duty ventilation equipment but also proper materials of construction, proper coatings and all built to the strict shipbuilding standards.
The benefit of high-caliber marine duty fans and blowers serve two main purposes:
- Maintains proper operational standards of the vessel
- Improve comfort onboard
Regardless of the type of maritime application, ventilation is needed to maintain the ship engine’s performance. Some of the main requirements for marine system ventilation is to reduce stale air, prevent mold from growing and stabilize humidity levels. This is why marine exhaust fans are necessary to keep key areas at certain levels.
Table of Contents
Marine Duty Fans
Marine duty axial fans and blowers are able to be mounted in any position. To combat the corrosive environment, marine duty fans are fully enclosed. The engines in fans and blowers for the marine industry are certified to meet IEEE 45 recommendations and approved by USCG.
Marine Duty Axial Exhaust Fan
Marine duty axial exhaust fans are specifically designed and built for the harshness of the marine environment.
Custom exhaust fans are available for any marine application.
Mixed Flow Fans
Engineered specifically for the offshore engineer. Nine standard sizes of compact, in-line mixed flow fans, with capacities up to 120,000 cfm and pressure up to 12″. All have steep pressure/volume characteristics and are suitable for high wind environments without excessive change in air delivery performance.
Although mixed flow fans are a viable option for many different marine applications, they are especially beneficial for vessels where there are people on board, such as cruise ships, casino boats, and yachts.
Tube Axial Fans
Marine duty tube axial fans can be mounted in any position, vertical or horizontal. They are available in direct drive or belt drive motors. Propellers provide taper lock bushing.
Due to the axial fan’s marine duty application, all motors are enclosed. The exterior of the duct axial fan features watertight conduit boxes.
Tube Axial Specifications:
- Size: 12” - 24”
- Performance range: 400-12,000 CFM
- Max static pressure: 6”
- Warranty: 1 - 3 years
Centrifugal Fans
Ventilation on a ship may require to be achieved with marine duty centrifugal fans with corrosion resistant coatings featuring single-width, single-inlet (SWSI) design. Backward-curved blades are available for maximum efficiency.
Suitable for clean air or industrial fumes. Low pressure & high airflow centrifugal fans with the electric motor directly coupled to the can with an impeller splined to the shaft.
Specifications:
- Size: 12” - 73”
- Performance range: 1,000-27000 CFM
- Max static pressure: 10”
- Warranty: 1 - 3 years
Vane Axial Fans
Vane axial fans are ideal for marine applications due to it’s efficiency and minimal clearance from the blade tips and fan housing. Beneficial due to its high volume of air at medium to high pressure where space is a luxury.
- Size: 12” - 79”
- Performance range: 500 - 200,000 CFM
- Max static pressure: 5”
- Warranty: 1 - 3 years
Marine Engine Rooms
Marine ventilation systems, including those equipped with droplet eliminators, demand industrial-grade fans for compact spaces below the ship’s deck, such as the engine room. Marine duty fans, tailored for these challenging environments, are typically designed with a small footprint, making them ideal for marine engine rooms.
Furthermore, water-tight electrical connections are necessary to resist corrosive environments. That is why marine duty electrical connections and IEEE45 motors are necessary for both below and above-deck applications.
Container Ships, Cargo Vessels & Barges
Cargo and container ships may require ventilation to prevent condensation, dissipate gas, and remove heat.
Ventilation is key if the cargo aboard is generating heat or liable to combustion. If the latter is a possibility then ventilation is imperative for not only the goods being transported, the cargo ship itself but also for the safety of the crew of the ship.
It is not uncommon for barges to transport chemicals that must be properly ventilated. The cargo aboard a barge must be monitored and ventilated accordingly.
Casino Boats, Cruise Ships & Yachts
Ventilation systems on casino boats, cruise ships, yachts and other large vessels have different ventilation requirements depending on the size and amount of people onboard.
Casino boats and cruise ships previously relied on filtration systems, but have since switched to “fresh air mix” ventilation, especially in public spaces and staterooms.
Mixing fresh air with circulated air reduces costs, but more importantly keeps pathogens from spreading. HVAC systems continuously supply 100% fresh, filtered air from outdoors to all indoor spaces.
In addition to fresh air mix, HEPA filters are applied. The air is also treated with UV-C light to eradicate viruses not caught in the HEPA filter. UV-C light has been proven to kill coronaviruses like COVID-19 (FDA Source).
Most yachts are gasoline powered and are regulated by law to meet ventilation requirements. Fumes from the yacht’s engine can accumulate in the bilge, which increases the chances of explosion if not ventilated properly using heavy-duty marine fans.
Excess heat that is generated by the yacht should also be considered. The heat not only diminishes the boat’s engine, but reduces alternator output and battery power.
Other issues of a poor ventilation system on yachts are damage to belts, hoses and engine components. Excess heat not only impairs engine performance, but reduces alternator output and battery power, and can damage hoses, belts and other components.
Dredger Ventilation Equipment
The equipment on a dredger requires a robust ventilation system that must provide equipment areas with a steady flow of fresh air for both equipment and personnel.
Dredgers consist of heavy duty centrifugal pumps and other heavy-duty equipment onboard that generates a significant amount of heat. Marine duty fans and blowers must withstand stringent working conditions in order to keep downtime to a minimum. Furthermore, the wellbeing of the crew and staff is vital, therefore fresh air to improve the personnel’s indoor air quality is imperative.
Ventilation systems must also adhere to vibration and noise standards. In account of such, accessories for maritime fans such as sound dampers and suppressors are available.
Marine Fan Accessories
- Companion Flanges
- Inlet bells
- Louvers
- Explosion Proof
- Sound mufflers
- Dampers
- Aluminum rub rings for non-spark fans
- Lift lugs
- Safety Guards
Ventilation Equipment for Boatyards
The equipment on a dredger requires a robust HVAC system that must provide equipment areas with a steady flow of fresh air for both equipment and personnel. Dredgers consist of heavy duty centrifugal pumps and other heavy-duty equipment onboard that generates a significant amount of heat.
Marine duty fans and blowers must withstand stringent working conditions in order to keep downtime to a minimum. Furthermore, the wellbeing of the crew and staff is vital, therefore fresh air to improve the personnel’s indoor air quality is imperative.
Ventilation systems must also adhere to vibration and noise standards. In account of such, accessories for maritime fans such as sound dampers and suppressors are available.
Marine Fan Sizes
Each fan is available for custom order. From 12” to 72”.
Marine Fan Features
- Die Cast Aluminum hubs and adjustable pitch blades
- Taper lock bushings and straight bore arrangements
- ISO standard 1940 G 6.3
- AMCA standard 210
Marine Duty Fan Materials
- Carbon Steel
- Aluminum
- Titanium
- Highly Resistant Alloys
- Reinforced plastic polymers composites
Ventilation Finishes & Coatings
- Galvanization treatment
Contact Us
R. Williamson & Associates has been in the ventilation business since 1931 and has a long history of providing ventilation equipment for maritime applications.
Should you have any questions or comments regarding an application please do not hesitate to reach out to one of our trusted experts.
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