The air is not quite as warm as promised in the brochure?
If the system is under one year old, it will often blow in more air than expected. This results in lower temperatures and is due to the fact that the solar cell produces an extraordinary amount of electricity to begin with. After approximately one year, the solar cells electricity production will stabilize at the specified level. The extra amount of air to begin with is usually an advantage as it dehumidifies the house more quickly. If you want warmer air, you can adjust the temperature by turning down the damper at the air injection duct, or by turning down the electronic regulator if the system has one.