FAQ

Example: You want to lower the room temperature by at least 2°C.

Is the outside temperature permanently lower than the inside?

No: You need an air conditioner.

Yes: Open the window and use a fan.
If you cannot easily open the window for longer periods of time, you will also need air conditioning.

If you want to reduce the humidity from 75% to 55%, for example, a fan alone will not be sufficient. For this you need an air conditioner to lower the warm indoor temperature and reduce the humidity.

1. Room size in m² (area) or m³ (area x height)
2. Heat load or heat-introducing factors
3. Time (How quickly should the room be cooled?)

Do you want to lower the room temperature and by how many degrees (°C)?

Do you want to reduce the humidity in the room?

To determine the cooling capacity, divide your house or apartment into rooms or areas. Which rooms have priority or are there even areas within rooms that need to be cooler?

What are the potential heat sources per room?

Will these heat sources change in the next few days?

Your room, the walls and furniture have heated up and stored the heat - this is called latent heat. If the outside temperature drops for a few days and you can open the windows, you can try to reduce the latent heat in the room by using the cool air flow. If the cold air flow is greater than the latent heat (heat build-up), you can even cool your room in the long term.

Your building and furnishing structure is like a sponge and absorbs the heat that remains in the surfaces of external walls, windows, roofs and floors. The time it takes to eliminate the heat build-up depends on many factors: building materials, fresh/cold air and direct sunlight, outside temperature, etc.

Removing latent heat from living spaces can take between 5 and 10 days.

• For the size of the room in m3 or the total volume of air to be moved
• Size of the temperature difference between current and desired room temperature
• Change in heat load
• Humidity in the room
• Time – how quickly should the room be cooled down?

2 air changes per hour is the minimum if the desired temperature differs slightly from the current temperature and the environment has a low heat load and few additional heat sources. e.g.: storage rooms with low turnover, wine cellars.

4-fold air changes per hour is recommended when there is a heat load from outside and latent heat is introduced (e.g. bringing in goods with a temperature above the target temperature, 2 or more people in the room, devices/machines in the room...). 4-fold air changes are standard for temporary air conditioning, e.g. in offices.

8 air changes per hour are necessary when the target temperature is critical (must not fluctuate) and when high heat loads are expected. e.g.: food storage, laboratories.

16 air changes per hour or more are required when the heat load is very high and fluctuating and the time to reach the target temperature is very short. e.g.: sensitive electronics, vehicles, test laboratories.

Cool Mono (1 part) is a compact unit/machine that sucks in the warm air from the room, then cools it and blows the cold air out into the room. The hot exhaust air is discharged outside through the exhaust hose. The exhaust hose is led outside through an opening (usually a window that is provided with a flexible window seal).

Cool Air Split (2 parts) consists of 2 units - a so-called inner part (in the room), where, similar to the monoblock, the warm room air is sucked in and cold air is released. The heat generated is led to the outdoor part/condenser via thin cooling lines. Due to the smaller hoses in split units, the required openings to the outside air are smaller than in monoblocks and the waste heat is dissipated more efficiently. However, if you want to close the opening (e.g. window), the split system must be decoupled. The monoblock also does not require an outdoor unit, which always has to be outside the room to be cooled during operation.

If the room you want to cool has a window that can be opened or tilted, then a monoblock is best. Even if it requires the window or door to be closed more often, the Cool Mono has advantages for you.

If you have the option of setting up the outdoor unit (e.g. on a balcony), then a Cool Air Split unit is definitely the right choice.

Basically, we always recommend a flexible window seal (window kit).

1. This increases efficiency because the flow of warm air from outside into the cool room is prevented or reduced by the seal.
2. The window seal prevents insects from entering the room through the window opening
3. The seal prevents animals such as cats or small children from easily getting through the open window.

Yes, you can close the window without removing the window seal (window kit) first - you only have to remove the exhaust hose of the monoblock or the cooling hoses to the condenser (outdoor unit) of the split unit from the window opening.

Yes, every real air conditioning unit produces condensation. The higher the humidity, the more condensation is created during the cooling process.

Why does condensation occur?
Warm air can simply always absorb more moisture than cooler air - this follows the laws of physics. Therefore, when warm air cools down, condensate (water) will always form.

Cool Mono: The condensate water is directed into an internal tank. If the tank is full and is not emptied regularly (into a container or drain) then the water is evaporated internally and transported outside via the hot exhaust air. This evaporation process can reduce the cooling performance.

Cool Air Split: In all climaexpert/clima2rent Split devices, the condensate is led outside via the cooling pipes, thus ensuring constant cooling performance.

These recommendations are based on moderate heat loads and low relative humidity:

For larger and more complex rooms, please contact our experts directly at info@climaexpert.ch