An HVLS fan is a heavy rotating machine above people, so installation matters as much as the fan. Before installing, confirm the roof structure can carry it, the blades have clear space on all sides, the electrical supply is ready, and the safety cable and guy wires are fitted. Use this checklist with your installer.
Before the site visit
- ☐ Building drawing or sketch with dimensions
- ☐ Roof type: steel truss, purlin, PEB or RCC
- ☐ Clear height under the roof steel
- ☐ Positions of lights, sprinklers, ducts, cranes and racks
- ☐ Power supply available and distance from the panel
Structure
- ☐ The fan hangs from a main structural member, not from sheeting or light purlins
- ☐ The structure can carry the fan weight plus running loads (ask us for the weight of your size)
- ☐ A mounting bracket suited to the beam or truss type
- ☐ Extension rod length chosen so the fan sits at the right height
Clearances
- ☐ Blades well above head height and above forklifts, racks and vehicles
- ☐ Clear of walls, columns, lights and sprinklers all round
- ☐ Not directly under a skylight or strong roof vent
- ☐ Outside the path of overhead cranes
Safety fittings
- ☐ A safety cable from the fan to the structure
- ☐ Guy wires to stop sway on long extension rods
- ☐ Blade retention hardware fitted as supplied
- ☐ Fire alarm link, if your building requires fans to stop on alarm
Electrical
- ☐ Dedicated supply and isolator for each fan
- ☐ Controller mounted where operators can reach it
- ☐ Earthing done and checked
- ☐ Cable routed clear of the blades
Commissioning
- ☐ Fan runs smoothly at every speed, with no wobble or noise
- ☐ Direction of rotation correct
- ☐ Bolts re-checked after the first hours of running
- ☐ Operators shown how to run and stop the fan
Routine checks
Look at the fan every few months: mounting bolts, safety cable, guy wires and blade condition. PMSM direct-drive fans have no gearbox oil to change.
Who installs
We quote installation separately after a site check and install across India. Site visits are free in Mumbai and nearby Maharashtra; elsewhere a visit fee applies. See HVLS fans.
Frequently asked questions
Can an HVLS fan be installed on any roof?
It needs a structural member able to carry its weight and running loads, and enough clear height. A site check confirms this.
What height is needed for an HVLS fan?
Enough for the blades to sit well above people, vehicles and racks with clear space around them; share your roof height for a recommendation.
Is a safety cable necessary on an HVLS fan?
Yes. A safety cable to the structure is a standard part of a safe installation.