If anyone has ever retrofitted an older 2-story house for central air conditioning, you will know that the top floor will never get cold enough. After all cold air sinks. I recently installed a ductless air conditioning units in each of my bedrooms. What this allows me to do is:
- Only run the air conditioning in the room that I am in (saves on electricity)
- Allows me to set the room temperature so when I sleep is the exact temperature I set
- Provides back up in case my normal central air goes out
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