Portable Exhaust Blower — Manufacturer & Supplier, India
Vayuvents manufactures Portable Exhaust Blowers for industrial fume, dust, and contaminated air removal from enclosed work areas, confined spaces, and maintenance locations. 300 mm to 750 mm. IS 3588. Mumbai. Call +91 90961 88703.
A Portable Exhaust Blower is a motor-driven portable fan configured specifically for exhaust duty — removing contaminated, fume-laden, hot, or oxygen-deficient air from enclosed work areas, confined spaces, and maintenance locations where permanently installed exhaust fans are not available or the work location changes.
Vayuvents portable exhaust blowers pull contaminated air from the work area and discharge it to the outside through flexible ducting or direct discharge. The forced exhaust creates a negative pressure in the work area — drawing in fresh replacement air through natural openings or a separately deployed supply fan.
Key applications include welding inside enclosed structures (ships, pressure vessels, tanks), solvent-based coating of internal surfaces, dust-generating maintenance activities in enclosed plant rooms, and post-entry purging of confined spaces after completing cleaning or inspection activities.
Flameproof Ex-d motor variants available for exhaust of flammable solvent vapours from painted or coated enclosed structures. Flexible duct connector supplied for connecting standard construction flexible duct for remote exhaust discharge.
Key Features & Benefits
Fully Portable
Wheeled trolley base or carrying handles — moves from location to location as ventilation needs change without any installation or structural fixing.
High Airflow Output
300 mm to 900 mm diameter provides 3,500 to 28,000 m³/hr — adequate fresh air supply or exhaust ventilation for spaces up to 2,000 m³.
Plug & Run
Short electrical cable connects to standard workshop socket — operational in minutes, no fixed wiring or installation work required.
IP55 Motor
IP55 TEFC motor handles site conditions — construction dust, humidity, and outdoor use without motor damage.
Reversible Option
Reversible motor option allows the same fan to supply fresh air or exhaust stale/contaminated air — versatile for changing site ventilation requirements.
Compact Storage
Compact dimensions for storage in plant room, site container, or maintenance store when not in active use.
Low Maintenance
Direct-drive design with no belts or pulleys — minimal maintenance, maximum uptime in demanding site and maintenance applications.
IS 3588 Compliant
Airflow performance tested per IS 3588-1987 with test certificate confirming stated free-air delivery.
Technical Specifications
| Parameter | Specification |
|---|---|
| Fan Diameter Range | 300 mm to 900 mm |
| Airflow (Free Air) | 3,500 m³/hr to 28,000 m³/hr |
| Motor Power Range | 0.25 HP to 2.0 HP |
| Motor Speed | 1,440 RPM (4-Pole) |
| Motor Enclosure | IP55 TEFC |
| Casing Material | MS / Aluminium / SS304 |
| Base Type | Wheeled trolley frame / Carrying handles |
| Power Supply | 415V 3-Phase 50Hz / 230V Single-Phase |
| Cable Length | 3 to 5 metres standard |
| Standards | IS 3588-1987 | IS 4894 |
Airflow Performance — Model Range
| Sr. | Fan Model | Fan Dia (mm) | Motor (HP/Pole) | RPM | Free Air (m³/hr) | @5 mmWG | @10 mmWG | @15 mmWG | @20 mmWG | @25 mmWG |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | AX-75-28-120 | 305 | 0.75/2P | 2800 | 2,300 | — | 2,000 | 1,750 | 1,400 | — |
| 2 | AX-25-14-120 | 305 | 0.25/4P | 1440 | 1,800 | — | 1,500 | 1,450 | 1,320 | — |
| 3 | AX-50-14-150 | 385 | 0.50/4P | 1440 | 2,250 | 1,950 | 1,200 | — | — | — |
| 4 | AX-75-28-15 | 385 | 0.75/2P | 2850 | 5,000 | — | 4,100 | 3,900 | 3,700 | 3,300 |
| 5 | AX-50-14-180 | 460 | 0.50/4P | 1440 | 6,750 | 6,000 | 5,500 | 4,400 | — | — |
| 6 | AX-100-28-180 | 460 | 1.0/2P | 2880 | 9,000 | 8,000 | 7,500 | 6,200 | — | — |
| 7 | AX-100-14-240 | 600 | 1.0/4P | 1440 | 11,500 | 11,200 | 11,000 | 10,900 | 10,800 | — |
- Fan selection based on air at 20°C, density 1.2 kg/m³.
- Fan performance and tolerance as per IS 3588-1987.
Product Images
Where It Is Used
- Welding exhaust inside ship tanks, pressure vessels, and enclosed structures
- Solvent fume exhaust during internal surface coating of tanks and vessels
- Dust exhaust from enclosed plant room grinding and cutting maintenance
- Post-entry confined space purge after completing cleaning operations
- Paint fume exhaust from enclosed painting operations in maintenance workshops
- CO exhaust from generator operation in partially enclosed areas
- Heat exhaust from enclosed boiler and heat exchanger maintenance areas
- Asbestos and mineral wool fibre exhaust during insulation removal maintenance
- Chemical spill area fume exhaust during emergency decontamination
- Battery room hydrogen exhaust during maintenance charging operations
- Photochemical process fume exhaust in darkroom and printing plate areas
- Temporary kitchen exhaust during construction site catering operations
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View Details →FAQs — Portable Exhaust Blower
Portable ventilation fans are used for temporary ventilation where fixed fans cannot be installed — confined space pre-entry air supply, construction site enclosed space ventilation, ship tank and hold pre-entry cooling, maintenance shutdown temporary air supply, and emergency deployment when fixed ventilation fails. They are the essential tool for safe confined space entry compliance under IS 5916 and OISD standards.
For safe confined space entry pre-ventilation, a minimum of 20 air changes per hour of the confined space volume is recommended, using fresh outdoor air (not recirculated). For a typical 50 m³ ship tank, this requires 1,000 m³/hr minimum — achieved by a 300 mm portable fan. For larger spaces (excavations, large vessels), 400 to 600 mm fans providing 6,000 to 13,000 m³/hr are recommended. Vayuvents provides sizing guidance for your specific confined space.
Yes. Portable fans with reversible motors supply fresh air when running forward and exhaust contaminated air when running in reverse. This flexibility allows one fan to serve both pre-entry supply ventilation and post-entry exhaust during work operations. Even without a reversible motor, the fan can be repositioned at the confined space opening to push air in or pull air out depending on whether supply or exhaust is needed.
Standard Vayuvents portable ventilation fans are supplied with 415V 3-phase supply for larger sizes (above 0.5 HP). For construction sites and confined space work where only single-phase supply is available, 230V single-phase versions are supplied for sizes up to 0.5 HP. Portable generator supply at 230V single-phase is the most common power source for confined space and construction site applications.
Standard portable fans with IP55 induction motors are NOT safe in explosive atmospheres (Zone 1 or Zone 2). For confined spaces that may contain flammable vapours (fuel tanks, solvent storage), only flameproof Ex-d certified portable fans should be used. Vayuvents can supply flameproof portable ventilation fans for hazardous atmosphere confined space entry — please specify when requesting a quotation.
A portable ventilation fan is an open propeller or tube axial fan designed for free-air supply or exhaust ventilation. A portable blower cum exhauster has a centrifugal or higher-pressure axial fan that can overcome the resistance of connected flexible ducting — allowing air to be directed to a specific point 10 to 30 metres away through a duct. The blower cum exhauster is preferred where the ventilation point is not directly accessible to the fan, requiring ductwork.
Contact Vayuvents at enquiry@vayuvents.com or call +91 90961 88703. Share the confined space or area volume, required airflow in m³/hr, power supply available (3-phase or single-phase), and any hazardous atmosphere requirements. We will recommend the correct model and provide a commercial proposal within 24 hours.