Built for All-Weather Rooftops
Factory-fitted weather hood, bird screen, and rain skirt keep the fan protected while exhausting hot air, smoke and fumes 24/7.
Roof Extraction Fan for Industrial & Commercial Rooftops
Shipped with pre-installed bird screen and rain hood for fast roof curb mounting.
The EMVEE RFX Series roof extraction fan combines a high-efficiency axial impeller with a rugged weather hood and curb plate assembly. Designed for warehouse smoke exhaust, kitchen make-up air relief, generator room ventilation and process heat removal, the unit delivers large air volumes while resisting rain ingress, backflow, and corrosion.
Quick Sizing Snapshot
Output
Enter your room dimensions and application to estimate airflow and see the recommended EMVEE RFX model.
Need a CFD-backed selection or ATEX certified build? Our engineers turn around proposals within 24 hours.
Why Facilities Choose Our Roof Exhaust Fans
Weather Sealed & Safe
Aluminium rain hood, bird screen and backdraft damper ensure reliable operation during monsoon and prevent wind-driven rain from entering the shaft.
High Efficiency Impellers
Computer-modelled aerofoil blades deliver strong extraction with low power draw, available in adjustable pitch for precise balancing.
Easy On-Site Integration
Supplied with curb base, vibration isolators, terminal box and optional VFDs for quick installation on RCC roofs or PEB structures.
Typical Technical Parameters
| Model | Diameter (mm) | Airflow (CMH) | Static Pressure (mmWG) | Motor (kW) | Sound @1.5m (dBA) |
|---|---|---|---|---|---|
| RFX-450-4P | 450 | 8,200 | 30 | 0.75 | 67 |
| RFX-630-6P | 630 | 16,500 | 32 | 2.2 | 71 |
| RFX-800-6P | 800 | 28,400 | 38 | 5.5 | 74 |
| RFX-1000-8P | 1000 | 44,600 | 45 | 11 | 78 |
Applications
- Industrial sheds, foundries and steel rolling mills
- Warehouses and distribution centres needing smoke relief
- Diesel generator & boiler rooms for hot air removal
- Commercial kitchens and food processing units
Available Options
- Backdraft dampers & gravity shutters
- Explosion-proof motors (Ex e / Ex d)
- F200 / F300 certified variants
- Integrated VFD with roof mounted isolator
Roof Exhaust Fan Selection Checklist for Indian Projects
Every EMVEE roof extraction fan is engineered for India’s demanding climate, with corrosion-resistant housings, stainless hardware, and IP55 motors that welcome monsoon conditions. Follow this checklist to size the right roof exhaust fan for warehouses, plants, and commercial kitchens.
- Confirm your design air change rate (ACH) for the process: warehouses 6 ACH, manufacturing 10 ACH, kitchens 15 ACH, smoke spill up to 20 ACH.
- Multiply roof length × width × height and apply your ACH to determine total CMH—our quick sizing snapshot automates this in seconds.
- Check static pressure losses from duct collars, bird screens, and gravity dampers to verify the selected model’s fan curve.
- Specify duty temperature and certification needs—F200 / F300 roof exhaust variants and ATEX motors are stocked in Ahmedabad.
Need a deeper dive? Read our latest guide on how to plan a roof extraction fan upgrade for retrofit tips, CFD best practices, and maintenance checklists.
Pan-India Project Support
We deliver roof mounted ventilation systems across Mumbai, Delhi NCR, Bengaluru, Hyderabad, Chennai, Pune, Ahmedabad and emerging industrial clusters. Our logistics partners offer rapid dispatch with wooden crating for rooftop lifts.
Design Documentation Pack
Each proposal includes GA drawings, fan curves, noise data, IE3 motor datasheets, and an installation checklist to help contractors complete the curb and electrical interface flawlessly.
Work with our in-house CFD team to simulate smoke extraction performance before you pour the slab.
Frequently Asked Questions
The fan is supplied with a galvanised steel curb plate that fixes to your RCC roof opening or PEB upstand. Simply anchor the plate, apply sealant tape, place the fan, and connect to the power isolator. Optional vibration pads ensure smooth operation even on metal decks.
Yes. The RFX Series can be supplied in F200 or F300 configurations with EN 12101 compliant motors. During a fire, the fan continues to run at elevated temperatures, rapidly venting smoke and improving visibility for evacuation.
Inspect the rain hood, bird screen and damper every quarter for debris build-up. Lubricate bearings as per motor instructions and ensure the terminal box gaskets remain watertight. Our service team can provide AMC support across India.