Though it is considerably more expensive than a window wall or portable ac unit it does an exceptionally good job of cooling and heating a single room or several rooms.
Is central air cheaper than wall units.
The average cost for running a central ac unit for 8 hours per day is around 100 200 per month.
The units themselves are cheaper and there are no installation costs.
Another option that is midway between room air conditioners and central air conditioning is the ductless mini split air conditioner.
This means that while a wall air conditioner is cheaper than a central air conditioning unit you will need to buy several units in order to cool the same square footage that one central air.
Central ac unit cons.
The initial cost of central air conditioning installation is higher than the cost of a wall unit installation especially the newest ductless systems.
However if you plan to use wall units to cool the entire house or multiple rooms the cost of installing multiple wall units may not be significantly lower than a central system.
Use less energy unless you have a window unit in each room and each one is constantly on full blast window units cost less to operate than central air.
Less expensive buying a few window units is far less expensive than having central air installed.