“The costs related to central air conditioning can vary widely depending ... when temperatures are high,” says Graham. And replacing an old system can be worthwhile too.

If your AC is old and not cooling efficiently, it may be more cost-effective in the long run to replace ... Life of an Air ...

How Much Does an Air Conditioner Cost Average ... some additional expenses that may come into play. If you’re replacing an old AC, you’ll need to remove and haul away the old unit.