Mitsubishi Heavy Industries Air Conditioners and Mitsubishi Heavy Industries Haier are not the same company, and there are considerable differences in production lines, raw materials and after-sales services. First of all, it needs to be made clear that Mitsubishi Heavy Industries air conditioners are a well-known Japanese brand, while Mitsubishi Heavy Industries Haier is just a Sino-Japanese joint venture factory and not a strictly registered trademark. Secondly, the compressors of Mitsubishi Heavy Industries air conditioners are imported from Japan. In addition, if you buy an Mitsubishi Heavy Industries air conditioner, you will get Mitsubishi Heavy Industries' after-sales warranty service, while if you buy an Mitsubishi Heavy Industries Haier air conditioner, you can only get Haier's after-sales warranty service. The difference between the two is still significant.

This answer applies to any Haier air conditioner