90% of all air condition problems are related to bad installations.   For this reason CLIMA755 invests continually in their installers to provide them with the best installation practices and techniques. There are so many things that could be done wrong without the client even noticing, which will eventually effect negatively the air condition performance; pipe bending without the proper tools, copper pipes with ends exposed during installation letting impurities enter the system, wrong or insufficient insulation, not enough vacuum of the system, low quality drain pipe materials and many more.   So next time give more weight to installation and pretend much more before committing to buy an air conditioner.