The principle of air stratification:

Warm air is less dense than cold air, so temperature layers form in our rooms, like a cocktail in a glass. Warmer air at the highest point, colder air at the bottom. We generally see a difference of 2° per linear metre of height, which is simply a colossal loss of energy.

What's more, it doesn't depend on the type of heating you have - all types of heating are affected, whether underfloor heating, pellet stoves, etc.

If you have a room with a 6-metre mezzanine, for example, the difference in temperature between the highest and lowest points will be around 12°! This means that if you had your heating thermostat on the sixth metre, you'd have to set it to 32° to feel 20° at the bottom!

Does that sound absurd? Well, that's what happens when you set your thermostat to 20° in your rooms with high ceilings. In reality, you heat your ceilings to 32°, where there's nobody to take advantage of it.

Destratification will solve the problem, the aim being to have a maximum difference of 3° over these 6 metres, i.e. 0.3 to 0.5° per metre of difference in level.

How does it work?

The blades rotate upwards in the direction of suction. This increases the speed at which the warm air rises to hit the ceiling, causing the air to flow back down the walls of your room.

As the air descends, it cools and becomes denser, then descends even faster, to be reheated and then rise again, etc. The cycle is complete.

The advantage of this system is that you don't feel any air on you, so you don't feel cold air.

So what's the difference between a destratifier and a ceiling fan?

To be an air destratifier, there are a series of conditions:

  1. Low power consumption, because destratifiers never stop - the first speed must be below 10 watts!
  2. A summer/winter function on the remote control, because perched 6 metres away, if the function is on the body of the fan, Then reaching it every six months would require a lot effort.
  3. They have to support extension leads of over 60 cm - in our case, some models go up to 1.80 metres. This allows you to get closer to the ground, which increases efficiency both in summer and winter.

Finally, there are super air detratifiers, products that were originally designed to be destratifiers rather than fans. For example, the Modulo or the BigCool Eco.

This table will give you an idea of the type of destratifiers you need. For example, if you have a 60m² room with a 6-metre cathedral ceiling, you will need a product with a diameter of 166 cm.