It is true that most of the world's urban areas are becoming larger, with megacities like Delhi, Jakarta, Shanghai, Beijing and Manila adding more than five million people in the last decade and most other urban areas are growing, but not as fast.
1 With professional installation, a central vacuum system can cost $800-$4,000, but averages about $1,200-$2,000 for new home construction (or as part of a remodeling project where the walls are already torn open) and $1,500-$2,500 for retrofitting an existing house.
Your condenser fan motor is located usually on the top of the condenser or on the side of it. The condenser is located outside. If the fan is not blowing any air when the a/c is on, most likely your condenser fan motor is burnt out.) The Condenser fan relay is bad. New condensers have a relay they turn the motor on and off when the system starts and turns off. The cost to replace a condenser fan relay can range from $175 to $275 the cost depends more on the make and model of the unit and the contractor installing the part.