I wonder if it would be efficient if a split AC's outdoor unit is installed 8 feet underground in a well with ventilation will be any efficient due to the constant temperature underground all year round?
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "Questions on the use of electronic devices are off-topic as this site is intended specifically for questions on electronics design." – duskwuff, RoyC, Neil_UK, PlasmaHH
In my opinion that's an interesting sollution. And it should work better.
The problem I see is if your AC unit is strong enough. I mean that you should check the strength of air flow from the AC to the compressor.
However if you are only talking about efficency ONLY than it should work better.
In the diagram you can't see but ambient temperature for outside tubes is also important and it affects the system, however as I told previously, the problem is the airflow strength and the 16 feet distance.