The crowdfunding campaign has started for the new project of idea3Di It's not possible and healtly to use air conditioner frequently: high electric energy consuption makes it a luxury accessor, and the excessive use could cause some malaises like headache, stiff neck, back ache and respiratory disease. Fans, at the same time, move the air and give a refreshment sensation, but, on the other side, stimulate sweating and could increase the risk of dehydration.