Technically, it is possible to use a split air conditioner and a window air conditioner in the same room, but it may not be the most efficient or cost-effective solution. Here are a few considerations:
Cooling Efficiency: Split air conditioners are generally more efficient and provide better cooling performance compared to window air conditioners. If you have a split AC installed in the room, adding a window AC might result in inconsistent cooling and potentially wasteful energy consumption.
Installation and Space: Both split AC and window AC units require installation and occupy space. Having two different types of AC units in the same room might lead to a more complicated installation process and take up additional space, which could be inconvenient.
Energy Consumption: Operating two air conditioning units simultaneously in the same room can significantly increase your energy consumption and utility costs. It is more efficient to rely on a single, properly sized AC unit to cool the room effectively.
If you have a split air conditioner already installed, it is generally recommended to rely on it alone for cooling the room. However, if you have specific cooling requirements or limitations, it would be best to consult with an HVAC professional to determine the most suitable solution for your needs.