Fall is in the air and everything is about to change. Days are getting shorter and leaves are falling. School activities are in full swing. It’s time to reacclimate!  

It also means you must ready your home for Midwest winter temperatures. This involves a transition from your air conditioning system – that worked so hard to cool you during the humid summer months – to switching on your furnace.

The Low-High Process

The key to reacclimating your home from summer cooling to winter heating is simply to remember warm air rises and cooler air sinks. That’s it in a nutshell. For a two-story home, the air conditioning system works hard to force cool air to the second floor. When approaching winter, warm air from the furnace will naturally rise to keep upstairs bedrooms warm and cozy. 

5-Step Solution

We recommend an easy 5-step approach for an efficient and cost-effective summer-to-winter reacclimation of your home:

  1.  Air Vents. Close the air vents in rooms on the higher floors and open those in your basement and on lower floors. Since cool air needs to be forced to higher elevations, you probably opened the upstairs vents last spring. Now, it’s time to do the opposite.
  2. Filters. Fall is the perfect time to replace the furnace filters. It’s amazing how much dirt and dust they collect. With your family spending more time inside your home during winter months, air quality is even more important. Also, don’t forget to change the filter on the air cleaner and dehumidifier. Filters are inexpensive.
  3. Test. Before it gets too cold, autumn is the time to test your furnace and confirm it is successfully forcing hot air throughout the home. Simply set your thermostat to a temperature around 75-degrees and switch to HEAT. Your furnace should start within a minute, and you should feel warm air coming through your vents. If not, you need to contact Flader Heating at 847-491-6980 for a professional inspection of your furnace and vents. Following your test, be sure to return the thermostat temperature setting to about 68 degrees.
  4. Duct Debris. During the test of your furnace, watch for any dust coming through the vent. This might suggest you need your vents cleaned by a professional HVAC service technician.
  5. Cover Air Conditioning Unit. Getting ready for winter includes covering your outside air conditioning unit. Remove any debris around it and cover it with a waterproof tarp to limit any rodent or pest infestation. 

We Help Homeowners

Flader Heating & Air Conditioning is uniquely suited to assist you in determining the ‘right’ solution that best fits your home’s needs. We’ve been serving the community for over 100 years and 4 generations of the Flader family. We take pride in exceeding expectations, providing peace of mind, and improving the comfort and quality of our customers’ lives.  

The Flader Difference

Only Flader Heating and Air Conditioning delivers:

  • The most responsive service. We’re here for you 24-hours/7-days a week.
  • Personal attention from certified and licensed technicians.
  • The most dependable equipment and parts.
  • Money saving maintenance agreements.
  • FREE annual filter replacements.
  • 100% satisfaction guaranteed.


Flader Plumbing and Heating recommends equipment, models, and brands proven to have the fewest problems and service calls. We specialize in:

Comprehensive Services

Whether you’re replacing your furnace or central air conditioning with advanced state-of-the-art equipment, adding a dehumidifier or clean-air system, or servicing your air-quality system, we are knowledgeable and expert in delivering the service you need. Look to us for your annual inspection, duct cleaning, and filter replacements.

Our professional technicians arrive on time, listen to your concerns, and answer your questions. They will recommend the right solution and deliver as promised. Flader technicians average 10 years of experience and are EPA certified.

Expert service, quality parts, and satisfaction guaranteed. That’s the winning trifecta you deserve. There’s no reason to compromise. Call us at 847-491-6980. 

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Flader thrives on exceeding expectations of our residential and commercial customers.  We deliver cost effective solutions for homeowners and businesses.  Our Service Centers in Evanston and Libertyville are ready to serve.  Call us today at 847-491-6980.

Flader Goes Skyward

A long-term commercial customer needed an upgrade on their air quality system.It required two 20-ton and two 10-ton Carrier units mounted on the rooftop, plus piping and custom sheet metal inside their manufacturing center. The Flader Team went skyward with a huge crane to land the units on the rooftop.In just 2½ days, the transformation was completed.Click “See our Work” to view more success stories.

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Flader Supports Youth Activities

Flader continues supporting local youth programs. We proudly sponsor EBSA and events at Robert Crown Community Center. It teaches teamwork, builds confidence, and strengthens our community.

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Evanston Service Center: 3004 Central, Evanston, Il 60201
Libertyville Service Center: 523 3rd Street, Libertyville, Il 60048