To rent air conditioners at a low price in the United States, consider the following options:

1. Local Appliance Rental Stores: These stores often offer air conditioners for rent at competitive rates. They may have a variety of units available, including window, portable, and central air conditioners.

2. Online Rental Platforms: Websites like Rent-A-Center or Aaron's offer a wide range of air conditioning units for rent. These platforms often provide flexible rental terms and can deliver the unit directly to your doorstep.

3. Utility Companies: Some utility companies provide air conditioning rental services as part of their energy-saving programs. This can be a cost-effective option, especially if you're looking to reduce your energy consumption.

4. Seasonal Rental Services: Companies specializing in seasonal rentals, such as Party City or PartyRentals, may offer air conditioners at discounted rates during off-peak seasons.

5. Social Media Marketplaces: Platforms like Facebook Marketplace or Nextdoor can be a treasure trove for finding affordable air conditioner rentals. Users often list their equipment for rent at lower prices than traditional rental stores.

The reason these options are cost-effective is due to the competitive market for air conditioner rentals. Local stores and online platforms often have promotions and discounts to attract customers. Additionally, utility companies and seasonal rental services may offer special rates to encourage energy conservation or to manage peak demand periods. According to the U.S. Energy Information Administration (EIA), the average cost of electricity in the United States has been steadily increasing, making energy-efficient appliances and rentals more attractive to consumers. By choosing a rental option that aligns with your specific needs and budget, you can enjoy the comfort of air conditioning without breaking the bank.