As the dog days of summer kick in, many of the more seasoned among us can remember back when air-conditioning was less common. Those who lived on or visited a family farm, for example, recall lying on the floor in front of a box fan trying to cool off, or sitting under a shade tree with a Mason jars of ice water resting on our forehead, or sleeping with the windows open in hopes of catching even a hint of an overnight breeze.

While most of us now live comfortably and blissfully with AC, about 39 million Americans (roughly 12 percent) still don’t use it, according to the U.S. Energy Information Administration, as quoted in an article in this past Sunday’s Tennessean titled “No AC? No Sweat.” (You can read it online here.)

It’s no surprise that most of those folks live in cooler climates, such as Alaska, and cities that benefit from lower humidity and sun. For instance, the least-air-conditioned American city is San Francisco, where 55 percent of homes don’t have AC, according to the U.S. Census Bureau’s American Housing Survey.

Sizzling in the South

Now, here in Tennessee and elsewhere in the South, it’s also no shock that pretty much everyone relies on air conditioning—about 93 percent, according to the U.S. Energy Information Administration.

In light of that, along with the rising costs of electricity in many communities, we’re assembled some tips and ideas for how to keep the AC going strong and as efficiently as possible throughout the summer months. (The sources for the following information include several articles and posts, such as those here, here, here, and here.)

1. Optimize your HVAC system’s air flow.

Change air filters regularly. A clogged filter will restrict airflow and force your unit(s) to work harder, which reduces efficiency and may cause costly damage.

Clean or replace your AC’s filters monthly. Check the manufacturer's recommendations for your specific filter type and replace or clean them as directed. Tip: Set a calendar reminder to change or clean yours at regular intervals throughout the year, such as quarterly.

Ensure adequate ventilation: Crack the windows at night when it's cooler (if they are in a safe, secure area, inaccessible from the outside), and use fans to circulate air, especially if you have ceiling fans.

Keep all vents clear: Ensure that your home’s furniture, curtains, boxes, and other items aren't blocking the system’s vents or return air ducts.

2. Reduce the heat inside your home.

Use your oven and dishwasher less in the warmer months: These appliances (and others; see the fourth bullet below) generate heat and can make your HVAC work harder than it has to.

Close those curtains and blinds: Draw the curtains or shut the blinds to block out direct sunlight and cut down on heat coming in from the outside.

Consider adding awnings and other shade: Planting trees in strategic areas and/or installing awnings around the house can reduce the sunlight hitting your windows.

Limit the use of heat-generating appliances: As noted in the first bullet above, try not to run dryers and other large appliances, especially during the hottest parts of the day.

3. Be sure to schedule regular HCAC maintenance.

Get an annual check-up: Schedule a professional tune-up before the cooling season to ensure everything is working well. Tip: Set a calendar reminder and include the info for the service provider that you will contact when it’s time for the next check-up.

Inspect and clean your unit’s coils: Clean the condenser and evaporator coils regularly to maintain efficiency. Tip: Ask your service provider to show you how to do this if you’re not sure.

Check the thermostat: Ensure that your home’s thermostat is working. Tip: Consider upgrading to a smart thermostat for even better control and to capture more potential energy savings.

And finally, address any issues promptly: Keep an ear and an eye out, and don't ignore unusual noises or performance issues you notice with your AC. Small, seemingly minor issues can quickly grow into bigger and more expensive problems if left unaddressed.

Happy dog days, and stay cool out (or in) there!

About EMTAR: Chartered in 1969, our Association’s 1,200+ REALTORS® are a proud part of the 36,000+ members of Tennessee REALTORS® and of the 1.5 million+ members of NAR, all working to serve the public and protect the rights of America’s property owners. EMTAR members are known not only for their unmatched real estate excellence and high ethical standards, but also for being generous, hospitable, others-focused, loyal, hardworking, and eager to help wherever and whenever help is needed.