Mushroom Ship Vents — Manufacturer & Supplier, India
Vayuvents manufactures Mushroom Ship Vents for natural and forced ventilation of ship cargo holds, tanks, and machinery spaces. GI, MS, aluminium, SS construction. IS 3588 compliant. Mumbai. Call +91 90961 88703.
Mushroom Ship Vents are the standard deck ventilation fittings for commercial and naval vessels — named for the characteristic dome-shaped mushroom head that provides weatherproof protection while permitting airflow. Vayuvents manufactures both natural (unpowered) mushroom vents and motorised forced-ventilation mushroom vent units for ship cargo holds, ballast tanks, void spaces, and machinery spaces.
Natural mushroom vents allow passive airflow driven by wind pressure and thermal buoyancy — adequate for void spaces and tanks not requiring personnel entry. Motorised mushroom vents add an electric fan inside the cylindrical housing for forced ventilation during cargo operations, maintenance entry preparation, and continuous machinery space ventilation.
Vayuvents mushroom ship vents are constructed in GI (galvanised iron), MS with marine paint, aluminium, and SS304/316 — matched to the service location on the vessel. Exposed weather deck vents use aluminium or SS316 for maximum corrosion resistance. Below-deck fittings use GI or MS with marine paint.
Throat diameters from 200 mm to 600 mm. Standard deck bolt mounting with rubber gasket seal for watertight installation. ATEX Ex-d motor variants for tankers and chemical carriers.
Key Features & Benefits
Marine-Grade Construction
MS or aluminium body with marine-grade anti-corrosion epoxy + polyurethane paint, SS316 hardware — designed for the continuous salt spray of shipboard and coastal environments.
Hinged Mushroom Head
Characteristic dome-shaped mushroom head hinges open for maintenance and access — closes automatically to seal against rain, sea spray, and deckwash when stopped.
Natural + Forced Ventilation
Provides both natural ventilation (mushroom head open, fan off) for free-air exchange and forced motorised exhaust or supply when fan is running.
IP55/IP56 Motor
IP55 or IP56 sealed motor for the wet, humid, and salt-laden shipboard and coastal environment — prevents motor failure from moisture ingress.
ATEX Option
Ex-d flameproof motor and non-sparking impeller for hazardous area deck mushroom ventilators on tankers and chemical carriers.
Low Maintenance
Simple direct-drive design with sealed bearings — minimal maintenance beyond annual inspection and cleaning of mushroom head hinges.
Deck Bolt Mounting
Circular base flange with gasket seal bolts directly to ship deck, tank roof, or building roof — watertight installation without structural modification.
IMO & IS 3588 Compliant
Fan performance per IS 3588-1987; marine construction per IMO and classification society guidelines on request.
Technical Specifications
| Parameter | Specification |
|---|---|
| Throat Diameter Range | 200 mm to 600 mm |
| Airflow (Free Air) | 1,000 m³/hr to 12,000 m³/hr |
| Motor Power Range | 0.18 kW to 1.1 kW |
| Motor Enclosure | IP55 TEFC (IP56 optional for marine) |
| Construction | MS / GI / Aluminium / SS304 / FRP |
| Mushroom Head | GI / Aluminium / FRP — hinged for access |
| Power Supply | 415V 3-Phase / 230V Single-Phase |
| Mounting | Deck / roof curb bolted with gasket seal |
| Standards | IS 3588-1987 | IS 4894 | IMO guidelines |
| Special Options | ATEX Ex-d for hazardous areas | SS316 for marine |
Product Images
Where It Is Used
- Cargo hold natural ventilation during general cargo and break-bulk operations
- Tank top ventilation for double-bottom and ballast tank maintenance access
- Void space passive ventilation to prevent corrosion from trapped moisture
- Machinery space forced exhaust during engine maintenance operations
- Accommodation ventilation natural air supply through weather deck vents
- Refrigerated cargo hold CO₂ monitoring pre-entry ventilation
- Grain cargo hold ventilation during loading to prevent moisture damage
- Coal cargo hold ventilation for methane gas dilution during carriage
- Chemical tanker cargo hold Zone 1 ATEX forced ventilation
- Hatch coaming ventilation for tweendeck cargo spaces
- Offshore platform deck area forced ventilation
- Inland waterway vessel hold and machinery ventilation
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View Details →FAQs — Mushroom Ship Vents
A marine mushroom ventilator is a compact axial fan in a cylindrical housing topped by a characteristic dome-shaped mushroom head — used for forced ventilation of ship tanks, cargo holds, machinery spaces, and accommodation areas. The mushroom head shape provides rain and spray protection while allowing natural ventilation airflow when the fan is not running. It is the standard ventilation fitting for small spaces and deck ventilators on commercial vessels worldwide.
Supply mushroom ventilators (blowers) push fresh air down into the space — the fan is mounted with the impeller blowing downward. Exhaust mushroom ventilators pull stale or contaminated air up and out — the fan impeller exhausts upward through the mushroom head. For a balanced ventilation system, spaces need both supply and exhaust mushroom ventilators — supply on the windward side, exhaust on the leeward side. The same unit can often be reversed for either duty.
For Class-approved vessels, mushroom ventilators may need to meet Classification Society (Lloyd's Register, DNV, Bureau Veritas, ABS, IRS) requirements for marine equipment. This typically requires type testing at an approved laboratory, verification of material certificates, and compliance with the specific ClassNK or IACS unified requirement. Vayuvents can arrange third-party testing and certification for Class-approved marine mushroom ventilators on request.
For cargo holds carrying flammable or explosive cargo (grain dust, coal dust, chemical tanker cargo vapours), ventilators must meet hazardous area requirements. Vayuvents supplies ATEX-certified Ex-d flameproof motor mushroom ventilators with non-sparking impellers for Zone 1 and Zone 2 classified cargo holds and pump rooms on tankers and chemical carriers.
For standard commercial vessel deck service: MS body with marine-grade epoxy + polyurethane topcoat paint, SS316 hardware, aluminium mushroom head. For high-humidity below-deck service: full aluminium or SS304 construction. For offshore platforms with very high salt spray: SS316L full construction. Vayuvents recommends the appropriate construction for your specific vessel and service location.
Mushroom ventilators require: (1) annual cleaning of mushroom head hinge and gasket; (2) motor bearing inspection and lubrication every 6 to 12 months; (3) paint inspection and touch-up annually where corrosion is found; (4) impeller cleaning every 6 months in dusty cargo hold service. Vayuvents recommends maintaining a spare mushroom ventilator or motor on board for immediate replacement if required.
Contact Vayuvents at enquiry@vayuvents.com or call +91 90961 88703. Share the vessel type, throat diameter, required airflow, motor power, supply voltage, and any ATEX or classification society certification requirements. We will provide a specification-matched selection and commercial proposal within 24 hours.