Beitrag No stress with the climate

No stress with the climate

Who hasn't experienced it: the sun is shining and the apartment heats up. What is desirable in winter and in the transitional period is unpleasant in summer or leads to heat stress.

This is not a problem in low-energy and passive houses, because the appropriate technology is available, yet it is a problem for many residents of older and insufficiently insulated flats.

Who hasn't experienced it: the sun is shining and the apartment heats up. What is desirable in winter and in the transitional period is unpleasant in summer or leads to heat stress.

This is not a problem in low-energy and passive houses, because the appropriate technology is available, yet it is a problem for many residents of older and insufficiently insulated flats.

The heat in the rooms can be reduced by closing shutters and curtains on sunny days, applying heat protection film to windows, cross-ventilating at night and in the morning when the air has cooled down and closing the windows again afterwards.

For those for whom all this is too little and who cannot take any further heat-insulating measures, the market offers air-conditioning units.

They are divided into split units and monoblocs.

Split units must be permanently installed. Monoblocs stand in the room and the waste heat is usually discharged to the outside through a hose - often through an open window. The fact that warm air constantly flows in through this window is already an energy disadvantage. In addition, it takes much longer to cool down a room than with split units and the power consumption is therefore higher.

Split units are more efficient. They consist of an outdoor and an indoor unit and are connected to each other with a refrigerant pipe. This transports the heat outside. They work effectively and consume less electricity than monoblocs, but are more expensive to buy. Installation may only be carried out by a specialist company. This is also explained by the fact that climate-damaging refrigerant is used. The system must be professionally filled.  In the case of a rented flat, the landlord's consent must be obtained for installation.

Monoblocs run on climate-friendly propane, are ready to plug in and do not require permission from the landlord.

Stiftung Warentest tested various air conditioners in its June 2020 issue. The test can be viewed at the consumer advice centres.

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