Why You Should Keep Your AC Running Even When the Weather Is Cool

The cool, crisp weather of fall offers a welcome respite for homeowners after months of blistering summer heat. As the weather gets milder with the approach of fall and winter, do you still need to keep the AC running, or would it be more practical to simply crack open the windows?

Each option has its pros and cons. Stone Heating and Air, one of your local HVAC maintenance companies, explains each in detail below.

Leaving the Windows Open While You Sleep 

According to sleep experts, the ideal temperature for sleeping is somewhere between 60°  and 67°F. Lowering the thermostat to these temperature levels can help you get a good night’s sleep. If, however, you want to lower your household’s heating and cooling costs, you can crack open a few windows to let the cool night breeze in.

Keep in mind that opening just one or two windows won’t be enough. To allow a pleasant breeze to flow through your home, you’ll need to open windows across the room from each other.

Why It’s Best to Continue Running Your HVAC System as the Weather Gets Colder

Leaving your windows open shouldn’t cause too many problems in late summer. However, when rains become more frequent as fall and winter approach, you should keep your windows shut and turn on your air conditioning unit or HVAC system to maintain good indoor air quality. This is because leaving your windows open enables moisture to infiltrate your interior.

Trapped moisture can create damp conditions that are ideal for the propagation of mold and mildew. Not to mention, open windows can allow dust, dirt and other allergens into your home, lowering indoor air quality. In addition to controlling indoor temperatures, air conditioners and HVAC systems also regulate humidity levels, helping maintain indoor comfort.

Don’t forget that your AC unit or HVAC system should be inspected at least twice a year. Routine AC or HVAC inspections and duct cleaning help prevent HVAC breakdowns, which are the last thing anyone wants in late fall.

Are you looking for HVAC technicians near you? 

Stone Heating and Air offers a wide range of professional HVAC services, including home heating repairs. To request an appointment, call us at (541) 203-2399 or fill out this form.  Talk to us today!

Category:

Request An Appointment

Please subscribe me to the newsletter
This field is for validation purposes and should be left unchanged.

We had our AC go out on one of the hottest days of the year. We called as soon as they opened and they came out so quickly and offered us some loaner units to keep our babies and animals cool in the meantime. Matt was so helpful and fixed the problem quickly. He went above and beyond to help us and we will be using Stone Heating and Air to replace our unit when it’s time. They’ll be our first call in the future!

Elizabeth T.

Matt's response was extremely quick, he was very professional and friendly. He explained everything in detail and was very knowledgeable. He had my unit up and running within no time! I highly recommend calling stone heating and air. I will be signing up for the yearly service plan with them!!

Tim S.

I had a wonderful experience to hangout with this superior crewmen who came to install a new HVAC system at my house. To see these professional guys were at work with their best, I would recommend to anyone to do business with this wonderful company! Best regards

Bryan H.

I’ve used Stone Heat and Air for several projects and every time they have preformed beyond my expectations. I would highly recommend them for any of your HVAC needs.

Matthew V.S.

Excellent Service I could not have been more happy with the service, quality and honesty that I received from Stone Heating and Air. I will refer this HVAC company to all of my friends.

Gene S

Great Service, knowledgeable service technician This was for our guest house heater. I was very happy with the service provided. They were on time, polite and clean. They inspected the Monitor heater and then proceeded to clean it and they were able to fix that. Will definitely use for jobs in the future

Amanda S

Maintenance Great service, and great price

Mike J.

Great Company Dave was fantastic. He is very knowledgeable about the system and his cleaning job was incredible. He was able to explain everything that he was doing and make it make sense for general homeowner. Good Job guys!

Brian F

Excellent service! Excellent service! Knowledgeable staff! I was very impressed with the responsiveness and knowledge of your team. Shortly after 1 called for an appointment, Dave and Gino did a thorough inspection of my system and explained all of the areas that needed repair or replacement. They gave me short and long-term options and the benefits of both. HVAC is not something I know a lot about so I had appreciated their patience. Overall, it was a great experience! 5 STARS!! Highly recommend Stone Heating and Air!

John L

Related Content

Humid

How Humidity Affects the Temperature of Your Home

By Stone Heating & Air | June 30, 2025
When planning your home's climate control strategy, it's not enough to focus on heating and cooling alone. One of the most overlooked but essential factors in your home's comfort is...
Cool House

How to Keep Your Home Cool in Summer Heat

By Stone Heating & Air | June 16, 2025
As temperatures rise, homeowners in Southern Oregon naturally turn to their air conditioners to maintain indoor comfort. However, depending solely on your HVAC system can strain the equipment, increase energy...
fluffseason

It’s Cottonwood Fluff Season! Time to Clean Your HVAC Coils.

By Stone Heating & Air | May 19, 2025
In Southern Oregon, the arrival of spring signals warmer weather, blooming flowers, and, for commercial property managers, the perfect time to schedule HVAC maintenance. But one seasonal phenomenon often catches...