Though there can be a bit of wiggle room, generally speaking, you should have your air conditioner serviced twice yearly: once in the fall and once in the spring. This is to ensure that it’s clean, that its parts are in good shape and that it’s operating as optimally as possible.

You can expect to replace an AC unit every 10-15 years unless you experience problems with the unit. Be sure to keep up with maintenance and proper storage of the unit once the weather becomes cold.

First things first, a typical residential HVAC system lasts between 10–25 years, but let’s look at that in closer detail. How long your heating and cooling appliances are expected to last depends on a few things, including: Your home’s current HVAC system setup, like whether your home has a boiler or a furnace.

Here are just a few ways:

1. Check seals on windows, doors and appliances.
2. Fix leaky ductwork.
3. Give your thermostat a nudge.
4. Adjust your fridge and freezer temperature.
5. Take shorter showers.
6. Replace your showerhead.
7. Don’t wash clothes in hot water.
8. Fix leaky faucets.

Between 4 and 8 Hours If you are replacing both your furnace and air conditioning unit at the same time, then the job will take between 8 to 14 hours. The length of time will vary depending on the size of the unit and your home, the location it’s installed, and the company you hire.