Technically, you can use a split air conditioner and a window air conditioner in the same room, but it's generally not recommended and can lead to inefficient cooling and increased energy consumption. Here's why:
Temperature Conflicts: The two air conditioning systems will work independently of each other, and their thermostats may not be synchronized. This can lead to conflicts in temperature control, with each system trying to cool the room to its set temperature. As a result, the air conditioners might end up working against each other, leading to inconsistent cooling and wasting energy.
Energy Inefficiency: Running two air conditioners in the same room will consume significantly more electricity than using just one unit. This can lead to higher energy bills and a less environmentally-friendly setup.
Airflow Interference: The placement of two air conditioning units in the same room can cause airflow interference. The airflows from both units might collide, disrupt each other, and fail to distribute cooled air efficiently throughout the room.
Installation Challenges: Installing both a split air conditioner and a window air conditioner in the same room can be challenging. You'll need to find suitable locations for both units that don't obstruct windows, doors, or each other, which can be impractical and aesthetically unappealing.
If you find that one air conditioner is not sufficient to cool your room adequately, it's better to consider upgrading to a larger and more powerful unit or consulting with a professional HVAC technician to assess your cooling needs. A well-sized and properly installed single air conditioning system, whether it's a split air conditioner or a window unit, should be able to provide effective cooling for the entire room without the need for a second unit.
In short, using both a split air conditioner and a window air conditioner in the same room is not recommended due to potential inefficiency, increased energy consumption, and cooling conflicts. Opting for a single, appropriately sized air conditioner will provide better results and more efficient cooling.