Typically a replacement will take one day.

Yes.

No, but you can save 10-15% by using a programmable thermostat correctly.

Not necessarily. It could be worse. If the unit is oversized it may go on and off more often. With Air Condition, sizing correctly is very important. We do that!

Mostly routine cleaning as well as changing filters, if your system has them.

Depending on the atmosphere, once to twice a year. A lot depends on conditions in the home, such as having pets that shed. Commercial systems may require more frequent service.

Ductwork should always be sealed for comfort and energy savings.