Saving Money With Your Air Conditioner

Air conditioning chews up 70% of the average electric bill. 

Make yours take a smaller bite.

Replace or Clean the Filter on Time

When the filter is dirty, your AC is working harder, burning more power and pushing out hotter air.  You are paying more for less service. Plus, you are shortening the life of your AC unit.  Now we are talking about $$$replacement cost$$$.

When should you do it? Every three weeks. I know the package says monthly, but we will cover why in a moment.

Filter abstract

Image by tanakawho via Flickr

Save Money on the Filter

If you are still using replaceable filters, buy them in bulk packs (usually four or six). Why? They are cheaper in the big pack— as much as $2 per filter cheaper.

If you have already invested in a washable, permanent filter (anywhere from $7-15), by the third time you clean it, you are making money. Take it out and vacuum it every three weeks, even if it does not look like it needs cleaning. Every third time, wash it.  It will disgust you… I promise.

Permanent filters are better for your wallet and the environment. You will throw one away every three to five years… not one per month.

Cold Air Sinks

You do not need to be cooling the basement.  Close the heating vents in the floor.  If not, the nice, cool air will be sinking through the vent into the basement to keep the boxes nice and cool. Save the electricity.

Keep it DRY

One of your air conditioners biggest jobs is to suck moisture out of the air.  Don’t give it more to do. Keep away from bathing, showering, cooking, laundry, sink-washing dishes and running humidifiers during the middle of the day when the air conditioning is working its hardest.

Save these chores for dawn or dusk.

Use the Thermostat

For years you have heard 78 in the summer and 68 in the winter.  Did you know that your air conditioner cannot lower the temperature more than 10 degrees? Use that knowledge when you adjust the thermostat.

When you leave for the day, do not raise the thermostat above 88. If the temperature outdoors will be less than 88, you can turn it off for the day. Crack cross windows, so air flows through the house. This will help you freshen the house as well.

Read about how you can save an extra $100 with your thermostat. (#2)

Give it a Physical

When you compare the price of a check up for an air conditioner (usually a service call price) to the price to replace one (added to three or four days with no cooling– or a hotel bill), you will quickly compute having your air conditioner checked once per year for fittings and freon reading is a wise investment.  A professional will pinpoint possible problems before they become emergencies or disasters.

Protecting your unit makes it safer for your pets and family. It eliminates poisonous freon leaks and keeps the air cleaner.

Personally, one physical saved our family more than $800. We replaced a $22 fitting, which, if it had ruptured on its own, would have lead to a $795 (plus tax and labor) evaporator replacement.  As far as I am concerned, it was one of the best $22 I ever spent.

Why three weeks?

When you look at the times you do your other chores, you will see you are taxing your air conditioner by making it wait. One week with a clogged filter can cost you $35-50.  Would you spend half an hour to save $35? That is a great hourly wage in my book! Invest the time and save the green.


© Red Dwyer 2011
Reblogging of this or any other post on The M3 Blog is expressly forbidden.
Copyright, Cookies and Privacy Policy available in The Office. 
Leave a comment


  1. Good tips! Thanks for the ping!

  2. Thank you for the tips! I especially like the ones about not doing household chores during the hottest parts of the day.

    • Glad I could be of assistance! Love your blog. Leave a link for other followers and come back often. I will be adding a new page to the blog for parenting, so I would love your input.

  3. My AC filters needed changing twice a month, I’m by a field. dust, dust, dust. My washable filters gave out and I couldn’t locate the 25x25x1 here. I had to go to the disposable. (those were washed everytime, and yes it was disgusting) it was a pain to go across town to get them. Now I’ve got window units. Cheaper to replace, and they came with cleanable filters.
    Laurie recently posted..Changes in Hope of SimplicityMy Profile

    • That to me is worth ordering online. If there is a Lowe’s close enough, they will order them for you. If you can find them online at, they ship to the store free.

      • Thanks, I’ll look. If they’re there and it gets serviced my light bill’ll be about what it is with the window units and I won’t faint at the $200 to $400 bills while people tell me it’s my imagination it’s not working right. My light bill went up, doubled and people told me it was the rates, the rates didn’t double and my electrical usage habits didn’t triple. Of course, I had someone that did not know an electric dryer used electricity….
        Laurie recently posted..Changes in Hope of SimplicityMy Profile

        • Well, there is that. Ugh. You need to move as much as I do.

          • I may need to move out into the woods somewhere, some moron started a petition to get Al. to be it’s own country, there were petitions for Ga. and a bunch of other states too. I don’t think I can live in a redneck ruled country, it’d set rights back about 300 years with these idiots.
            Laurie recently posted..Changes in Hope of SimplicityMy Profile

          • Fifteen is the last number I found. Be interesting to see if the Congress and the President will do as they say, but that is discussion for another place 😉

  4. Zoe Campos

     /  December 21, 2020

    I wasn’t aware that letting a dirty filter in my AC can only cost me more money until you mentioned it. It made me realize that we haven’t tried cleaning our air conditioning unit for a while now and we might be wasting money without knowing it. I guess this is the perfect time to hire HVAC contractors for their inspection and cleaning services.

  1. How to Teach Children to Live Green in 5 Steps | Momma's Money Matters
  2. Maintaining Your Emergency Funds: Are You Done? | Momma's Money Matters

Leave a Reply

Your email address will not be published.

CommentLuv badge

This site uses Akismet to reduce spam. Learn how your comment data is processed.