If submitting a service request after hours or on the weekend, please note it is best to call.

Rated 5.0 out of 5.0 based on 1963 reviews
(346) 209-6112 Emergency Services Available Request Service

Is It Bad To Have Your Windows Open AND Run Your AC?

March 31, 2023 | Blog

In general, it is not a good idea to run the AC while your home’s windows are open at the same time. Below, our Air Tech of Humble team shares the ways this wastes air conditioning and worsens indoor air quality.

Opening windows interferes with an HVAC system’s ability to cool a space because the system is designed to function with a completely sealed home. Untreated air — both in regards to temperature and purity — enters as air escapes through open windows.

What Happens To AC When Windows Are Open?

If the system is on, the majority of the air that an air conditioner blows into your home will escape through open windows. Because an AC system is built with rotational air movement in mind, to make it colder while windows are open, you’ll need to re-adjust the system’s settings.

Internal Components Wear Down Prematurely

Increased levels of debris and moisture are carried inside the house by the air from outside. These changes have the potential to wear down and harm various system components, which are not designed to process everything contained in outdoor air.

Thermostats, filters and other HVAC components will have issues due to accumulating coatings of grit and particles.

Increased Utility And Service Expenses

The air that enters the unit isn’t being filtered or treated as it would be if it came from inside, so the AC system will need to work harder to chill and purify it. Your utility expenses will increase significantly as a result of the additional strain placed on the HVAC system.

As the system strains to create air of the same quality, it’s performance will decline and create broken parts. After some time, this will lead to more repairs visits — you may even find yourself scheduling an AC replacement.

Air Quality

Not only does your home’s clean air escape through an open window, but soiled air is also let in. This means that your air conditioning system is circulating dirty air around your home, exposing you and your family to it. Your cooling and heating system can also be harmed by the new dust, which coats its coils and parts, preventing them from functioning as intended.

What Can You Do In Place Of Leaving Windows Open?

In order to avoid lowering your home’s indoor air quality, you should not leave your windows open for extended periods of time. Although you make think the air is colder outdoors, you can take the following steps to maintain your home at a cool temperature, without opening any windows:

Using Curtains or Blinds

Adjust your drapes and blinds when you see that the sun is up, beaming and heating up by the second. Your room will stay cool if you keep it out of direct sunshine. This impact will vary for different regions, but functions by preventing the heat from the sun’s rays from entering the house.

Window Tinting

It can be very helpful to keep moderate temperatures in your home if you have tints installed alongside drapes. Windows with tints reflect light in the opposite direction to avoid heat entering the home.


You have a limitless variety of materials to choose from when insulating your walls, floors and roof. Although insulating will surely cost you financially, it is a long-term fix that will save you money.

Insulation functions by keeping warm air from entering and cool air from leaving your home. Your air conditioner runs less frequently to provide a comfortable indoor atmosphere with proper insulation.

Humble Air Conditioner Services

We proudly serve our community as an HVAC repair company to make all homes comfortable and safe. If you are in need of AC maintenance, do not hesitate to contact Air Tech of Humble. It is our mission to provide you with the utmost satisfaction to restore your home’s comfort.

Why Choose Us?

We go above and beyond for you. That's a promise.

Learn More
If the compressor in your air conditioner fails twice in the first 5 years, we will install a complete and new condensing unit. If the heat exchanger in your furnace fails in the first 10 years, we will install a new furnace.
If your system breaks down during the first year and leaves you without heating or cooling, we will be there within 24 hours or we will pay you $500 for your inconvenience.
You will save a minimum of 30% on your heating and cooling costs or we will refund double-the-difference of your savings not realized during the first year.
All technicians in your home have an extensive background check performed and are randomly drug tested for your safety.

What Our Customers Are Saying

Extremely Professional

This is the 2nd time we’ve used Elite and I can honestly say they will continue to be my go to company when it comes to heating and AC repairs. They are extremely professional, quick service times, and affordable, even for this single momma! Thank you again for saving us during this chilly winter.

Amy F.

Elite Service and Great Pricing!

My technician Michael Ford was very knowledgeable and he made sure everything was working effectively. Michael was very professional and customer friendly. From the first day I started service the customer service has always been great. I would definitely recommend Elite because they are definitely going to give Elite service and great pricing!

Sharon B.

Very Honest and Thorough

Very honest and thorough. From the first contact with the scheduler to updated communication for appointments, very professional. Michael provided us different options to address system issues and charges were reasonable. 5 of 5 stars in service, highly recommend

Chris A.