The cost of a new air conditioner installation in Ottawa is approximately $3,500. The cost includes the removal of the old unit, the cost of the central air conditioning unit, the material required for the air conditioner installation as well as labor costs. The AC Installation in Ottawa costs varies from the ranges and sizes of the unit, the output of the system, the layout, and the size of your house. The general price of an air conditioning system can range between $2,500 to $7,000.