Air that actually moves.
Comfort that actually lasts.
Off Grid Energy & Water's MegaFan systems recirculate heat in winter, cool naturally in summer, and improves the indoor climate and accordingly work environment all year round.
KEY BENEFITS
One fan, three problems solved
Winter heat recovery
Warm air rises and pools at the ceiling — wasted energy you've already paid for. Mega Fan gently pushes it back down to floor level, cutting heating costs by up to 25%.
Summer cooling, no AC required
A steady, low-speed airflow creates a felt cooling effect of 3-4°C, reducing the need for mechanical air conditioning by up to 20% — without the running cost of a compressor.
Improved indoor climate & work conditions
By ensuring a uniform temperature and preventing the formation of pockets of stagnant air, better air quality and consequently a better working environment. The fans also help reduce humidity simply by setting large volumes of air in slow motion.
Designed for buildings with high ceilings
High ceilings and large open floors are efficient to build, but expensive to heat or cool — the warm air simply pools against the ceiling.
HVLS fans are engineered for exactly this problem: warehouses and distribution centers, manufacturing halls and workshops, sports arenas and swimming halls, and public and commercial buildings with large open volumes. Diameters from 3.0 to 6.0 m are matched to the space, not the other way around — smaller premises don't need to over-invest in capacity they'll never use.
Why facility managers choose MegaFan
Fast payback
Typical installations pay for themselves in around 3 years through reduced heating and cooling costs — after that, the savings go straight to the bottom line.
No construction project
MegaFan mounts to existing ceiling structures. No new ductwork, no downtime, no disruption to daily operations — installation is measured in days, not months.
Built to run for decades
Rated for over 60,000 hours of operation, with a direct-drive design that avoids the belts and gearboxes that typically fail first in industrial fans
Local engineering & support
Delivered and supported in Norway through our partnership with EDA Elektro Data AS for electrical integration and MOTEK AS for structural mounting — not a fan shipped in a box with no one to call.
Complete solutions and local support
We handle the entire process – from consultation to final installation, commissioning and follow-up
MegaFan technology in detail
Control options
MegaFan systems can either be delivered with an analogue control unit for a singel fan or an automated network controller that control several fans. The automated controller includes 2 temperature & humidity sensors, and can be integrated into your building's existing management system (BMS). This means you can schedule and tailor temperature settings to your building's actual usage patterns.
Applications for HVLS fans
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![Indoor sports gymnasium with a blue floor, basketball hoops, and a high ceiling with wooden beams.]()
Sports and leisure
· Sports halls and gymnasiums
· Fitness centers and climbing halls
· Swimming pools and indoor arenas
· Riding halls -
![Interior of a modern, spacious cafe or restaurant with wooden decor, tables, benches, and large ceiling fans. The ceiling has skylights and track lighting, with a sign spelling 'GALLERY' hanging vertically.]()
Commercial buildings
· Shopping centers and department stores
· Grocery stores and supermarkets
· Car dealerships and showrooms
· Conference and exhibition halls -
![Interior of a warehouse or industrial facility with ceiling-mounted lighting, a large orange overhead crane labeled 'ELEVE 3.2t', and stacked pallets on shelves.]()
Industrial and commercial
· Production facilities
· Warehouses and logistics terminals
· Workshops and mechanical factories
· Agricultural buildings (stables, barns, and greenhouses)
· Underground facilities and mountain halls
· Data centers and server rooms -
![Ceiling of a warehouse or industrial building with red metal beams, black tracks, and bright fluorescent lights.]()
Public and institutional buildings
· Schools and universities
· Cultural centers and libraries
· Churches · Airports, hangars, and train workshops
· Hospitals and health institutions (technical rooms and storage areas)
Two models, built for every space
AirSlim
The lighter, more compact model in the range –from 3,0 to 4,3 M in diameter. Built for ceilings from 4 to 8 m high.
AirMax
HVLS fan prepared for the harshest conditions- from 4,0 to 6,0 M in diameter. Suitable for ceiling heights exceeding 8 M.
Frequently asked questions
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Mega Fan units move far larger volumes of air at very low rotation speeds (25–40 RPM), which is what makes them quiet, energy-efficient, and effective across a much larger floor area than a standard fan.
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Both. By pushing warm air that's collected at the ceiling back down to floor level, MegaFan directly reduces how much your heating system needs to run — typical savings are up to 25% in winter.
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For many facilities, no — the felt cooling effect of 3-4 °C is often enough on its own. For spaces that already have AC, MegaFan reduces how much it needs to run, cutting cooling costs by up to 20%
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MegaFan mounts to your existing ceiling structure. There's no construction project, no ductwork, and installation is typically completed in days without stopping normal operations.
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It depends on ceiling height, floor area, and how the space is used. We size every installation individually — a site assessment is the fastest way to get an accurate recommendation.
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MegaFan can be integrated into your building's management system (BMS) with automated scheduling and speed control, so it runs on its own based on your building's actual conditions.
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The direct-drive design is rated for 60,000+ hours of operation — significantly longer than fans relying on belts or gearboxes, which tend to be the first components to fail.
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Off Grid Energy & Water delivers MegaFan locally, and can handle the entire process from site inspection, installation to service. Installation can also be done by local electrician.
Stop paying for heat you are not using and get cooling effect on hot days
A short site assessment tells you exactly what MegaFan would save on your specific building — no obligation, no guesswork.