There are three main options to consider if you are looking at a new air conditioning unit for your home. First, you can always buy the unit and pay in cash. With this option, you should have a one-time installation fee, an annual maintenance fee to replace the filter, and you'll have to consider depreciation on its value each year it is in use. The second option is to finance the unit. If you finance the unit, you could see a lower monthly cost. The downsides are interest payments and you still have the other additional costs you see with owning the unit outright. In addition, you'll still be responsible for keeping up with regular maintenance. Last, you could rent the AC. More Americans are seeing the benefits of renting big-ticket items they have in their home. You will likely not have the interest payments to make when you lease the unit. You can also avoid the large upfront purchase which can be thousands of dollars. By renting an air conditioner you could see monthly payments as low as $15 a month. If you decide to go with renting the unit, make sure you choose a reputable company and that you read the rental agreement thoroughly. You should see clauses that cover installation, replacement filters, what happens if repairs are needed, and you could even have the option to receive upgrades from time to time.