Yes, it is possible to install a ductless mini-split air conditioner with the outdoor condenser unit piped and vented through a concrete block wall instead of going through a window. This method is commonly known as a "through-the-wall" installation.
Through-the-wall installations allow for a neater and more permanent solution compared to using a window. Here's a general overview of the process:
Select an appropriate location on the concrete block wall for the indoor unit. It should be positioned high on the wall for optimal airflow distribution.
Drill a hole through the concrete block wall for the refrigerant and electrical lines to pass through. The size of the hole will depend on the diameter of the lines.
Connect the refrigerant lines, electrical wiring, and condensate drain line to the indoor unit.
Install a line set cover or conduit to protect and conceal the lines as they run vertically down the wall from the indoor unit to the hole in the concrete block.
On the exterior side of the wall, mount the outdoor condenser unit. It should be positioned close to the hole for the lines to connect.
Connect the refrigerant lines and electrical wiring to the outdoor unit.
Install a protective cover or enclosure for the outdoor unit to shield it from the elements.
By utilizing this through-the-wall installation method, you can avoid sacrificing a window and maintain the aesthetics of your space. It's essential to consult with a professional HVAC technician or installer who can assess your specific situation, provide proper guidance, and ensure compliance with local building codes and regulations.
Regarding the power supply, ductless mini-split systems typically require a dedicated electrical circuit. If there is no existing 220-volt outlet nearby, an electrician may need to install one to accommodate the system's power requirements.
Keep in mind that the specifics of the installation process may vary based on the manufacturer's guidelines, the design of your home, and local building codes. Therefore, it's advisable to consult with an HVAC professional who can assess your specific needs and provide personalized guidance for your ductless mini-split installation.