Can you install the outside unit of split air conditioner next to a propane tank?

No, you should not install the outside unit of a split air conditioner next to a propane tank. Propane tanks are flammable, and the heat generated by the air conditioner could be enough to ignite the propane. This could cause an explosion, which could damage your home and injure or kill you and your family.

Propane tanks must be installed in a safe location away from sources of ignition. This includes any appliances or devices that could generate sparks, such as air conditioners, generators, and lawnmowers. The safest place to install a propane tank is in an open, well-ventilated area, away from trees and shrubs.

If you are not sure whether it is safe to install an air conditioner next to a propane tank, you should consult with a qualified HVAC technician.