Aircon vs Windows Down: How to Choose the Best Option

Aircon vs windows down - it's a debate that's been going on for ages. In fact, according to our article, aircon units can be up to 30% more energy-efficient than running multiple fans to cool a room.

But what really makes aircon stand out is its ability to control humidity levels. This is especially important in tropical climates where high humidity can make a room feel even hotter than it actually is.

Aircon units can also be equipped with air purification systems, which can be a major plus for people with allergies or respiratory issues.

For another approach, see: Aircon Humidity

Driving with the windows down can be a significant fuel efficiency killer, especially in older vehicles. In a 2004 study, a full-size SUV's fuel efficiency was reduced by 8 percent when the windows were down.

The more aerodynamic the vehicle, the more drag open windows will create. This is why the study found that the SUV, with its more aerodynamic design, had a smaller decrease in fuel efficiency compared to the sedan.

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However, newer vehicles may not be as affected by this. A 2013 test using a 2009 Toyota Corolla found that driving with the windows down was only less efficient than driving with the AC on at speeds over 80 miles per hour.

This means that if you're driving at lower speeds, you might not notice a big difference in fuel efficiency between driving with the windows down and driving with the AC on.

A different take: Ac Unit Not Working in House

Driving with the windows down is more efficient at slower speeds, which is essentially "city driving." This means driving on non-highway roads, stopping at lights, making turns, and so on.

The key reason is that there's less air resistance overall at slower speeds, so turning off the air conditioner will have a more direct impact on MPG.

Studies generally show it's better for fuel efficiency to open the windows under around 40 MPH.

At speeds above 60 mph, the difference between driving with the windows down and using the air conditioner becomes negligible, according to a 2013 SAE test using a 2009 Ford Explorer.

Related reading: Aircon with Windows Open

However, for larger vehicles, the cut-off speed for switching off the air conditioner is around 40 mph, while smaller vehicles like the Corolla can use the AC and get up to 70 to 80 mph without using extra gas.

Driving with the windows up and the AC off might be the most fuel-efficient way of all, but who can do that on a hot day?

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In the past, studies have shown that driving with the windows down can have a significant negative effect on fuel efficiency. A 2004 study by the Society of Automotive Engineers (SAE) found that driving with the windows down can reduce fuel efficiency by as much as 20 percent.

The type of vehicle also plays a role in how much of a difference driving with the windows down makes. For example, a full-size SUV was found to have a much smaller reduction in fuel efficiency, around 8 percent, compared to a full-size sedan.

Additional reading: Ac Unit for Room without Windows

Newer, more efficient vehicles may not see as big of a difference between driving with the windows down and driving with the AC on. The SAE conducted a 2013 test using a 2009 Toyota Corolla, which found that driving with the windows down was only less efficient than driving with the AC on at speeds over 80 miles per hour.

The debate between AC and non-AC is a common one, especially for RV owners.

Driving with the windows down may seem like a refreshing idea, but it actually works slower than AC due to the heat generated by the engine.

The RV AC gets warm while driving at a rate that can sometimes be even faster than it would be while not moving.

This is because the compressor starts to work "overtime" as the engine runs, blowing cooler or warmer air depending on your preferences.

In the end, AC wins the discussion due to its efficiency and convenience.

This is especially true when the RV air conditioner was crafted by experts like Mabru Power Systems.

The debate over whether to use the air conditioner or roll down the windows has been going on for a while. In 2004, the Society of Automotive Engineers conducted a study that showed driving with the windows down has a significant negative effect on fuel efficiency.

The study found that for a full-size sedan, driving with the windows down reduced fuel efficiency by 20 percent, while for a full-size SUV, it reduced efficiency by just 8 percent. This difference is likely due to the aerodynamics of the vehicle.

More recent studies have shown that newer, more efficient vehicles may not be affected as much by driving with the windows down. In fact, a 2013 test by the SAE found that a 2009 Toyota Corolla had to travel at speeds over 80 miles per hour before aerodynamic drag made it less efficient than driving with the AC on.

The MythBusters team put the theory to the test in an episode, conducting an experiment with two identical cars, one using AC and the other with windows rolled down. The results were quite enlightening.

Using aircon can be a blessing in hot weather, but it also has its downsides. Aircon units can be expensive to purchase and maintain, with some models costing upwards of $1,000 to install.

On the other hand, opening windows can be a cost-effective way to cool down, but it also lets in allergens and dust, which can exacerbate respiratory issues. In fact, a study found that opening windows can increase indoor pollen counts by up to 50%.

However, aircon can also dry out the air, leading to discomfort and even health issues like nosebleeds and dry skin. This is especially true in dry climates, where the aircon's dehumidifying capabilities can make the air feel even drier.

Broaden your view: Aircon Cool vs Dry

Air con can reduce the inside temperature of the car very quickly. This is especially useful on hot summer days when you need to cool down fast.

Most people prefer to use air con at high speeds on the motorway, and it's easy to see why - the air con system works more efficiently at higher speeds.

Recommended read: Diy Air Con Units

With the windows up, you can enjoy reduced noise and still make calls on Bluetooth. I've found this to be particularly useful on long road trips where you need to stay connected.

The inside temperature is usually cooler using air con than having windows down, depending on the car and the quality of the air con system. This is because the air con system can cool the air more efficiently than the airflow from the windows.

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Driving with your windows down can be a bit of a mixed bag.

It's very noisy with the windows open, especially on motorways. This can be a real drawback, especially if you're planning a long road trip.

The engine has to work harder at high speeds when driving with open windows, which can decrease your fuel efficiency.

Insects and bugs can fly in, which can be a nuisance and even damage your car's interior.

Here are some specific cons of driving with your windows down: