When hot air rises it ‘floats’ on top of cold air because it is less dense. This creates what’s called a ‘stack-effect’ in a building and as a result, areas end up being heated from the top down. Typically, a temperature difference of up to 10°C can happen within a 10m high indoor space.
Ceiling fans gently induce air movement which ensures that the air is mixed to produce a uniform temperature. Consequently, building HVAC thermostat settings can be reduced with associated reductions in energy costs but with improved occupant comfort. Where cooling is required, ceiling fans provide an alternative to 'energy and maintenance hungry' air-conditioning systems. They don't cool the air but, set at a higher speed, they use the 'wind chill' effect to provide evaporative cooling for occupants. They can also work in conjunction with air-conditioning where the movement of air improves the effectiveness of the air-conditioning, meaning set-points can be reduced and equipment operation reduced.
Elimination of hot or cold spots
Improved occupant comfort
Return on Investment