Action Guide

Thank Your Fans: Central A/C

Difficulty: Difficulty: 2 Expense: Expense: 1 Savings: 540 lbs CO2 / $26 Bookmark and Share

Use fans instead of your central A/C on cool summer nights.

Why You Should Do It

Those lovely night breezes can save you money if you just open a few windows and let them in!  Try using fans in your windows to take advantage of the cooler air instead of using your central air conditioner to cool your bedroom at night.  You can use the money you save to keep your freezer stocked with popsicles!

What It Costs

Free!  Or, if you don't have a window fan yet, you can find decent fans for under $20.

How to Do It

  1. Select “Add to My Challenge” and pledge to use fans at night instead of your central A/C.
  2. Make a note for yourself and put it on your nightstand or on your bathroom mirror.
  3. Make sure you have a fan that fits comfortably in your window and can easily reach an outlet.
  4. Turn off your central A/C at night and plug in your new fan!
  5. Congratulate yourself for saving energy and money and making a difference for Minnesota!


  • says:

    Since we're insulated and put in some double hung windows we don't need AC any more

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