Watch How Ventilating Dehumidifiers Create Healthy, Comfortable Indoor Environments

Control humidity and ventilate.

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Chicago's extreme weather has created the need for year-round humidity control systems. Air conditioners alone are no longer a sufficient means of controlling high humidity in the summer and in the dry, winter months stand alone humidifiers don't provide enough moisture management for most of today's homes and buildings. Left unattended, excessive humidity will damage a building and will eventually impact the health of occupants through unhealthy indoor air. Tighter, more energy efficient building methods combined with Chicago's extreme weather has created the need for year-round dehumidifiying systems.   

Priority Energy is a leader in building science and HVAC system design. We have seen and diagnosed countless structural problems that were humidity and moisture related.  We recommend dehumidfication systems to all our projects to maintain  healthy and long-lasting structures. 

What's Changed?  Do I Really Need a Whole Home Dehumidifier in the Midwest?

The homes and offices we are building today are not the same as the buildings we constructed even 10 years ago.  They are tighter and better insulated, which is great for reducing the amount of energy we consume; and they are usually more comfortable than before.   

There are two types of heat an air conditioner must deal with.  Sensible heat (think temperature), and latent heat (think humidity or moisture related).  Unfortunately, central air conditionering is much better for removing sensible heat; approximately 70-80% of their capacity only deals with sensible. For the 20-30% humidity removal, the AC has to run at least 8 minutes before it's able to actually remove any moisture.  We call this the sensible to latent ratio or sensible heat ratio (SHR).

Today's high performing, energy efficient homes (through better insulation, windows, etc.), are reducing the amount of sensible cooling we need, yet the amount of moisture (latent heat) we are producing in our homes (breathing, cooking, bathing, etc...) has not changed.  Can you see how the SHR of the standard central air conditioning system is no longer alligned?  Not to mention seasonal changes; when it's too chilly to open the windows in the spring and fall, but we're still dealing with humidity levels above our ideal range of 45-60% (dependent upon the outside temperatures).

There are also times during the winter, because of the increased efficiency, when we will need to dehumidify our homes - to eliminate damaging condesation on our windows, walls and ceilings.  This is not to say our homes can't handle some bits of condensation, but when left unchecked this is a recipe for disaster.  It is critical to control humidity levels as outside temperatures flucuate.  The good news is, we can accomplish humidity control through the introduction of outside air (ventilation), which is something we need anyway for a healthy home.

Recommendations for Maintaining Proper Humidity Levels and Healthy IAQ:

  1. Install an HVAC system which includes:
    1. A properly sized VARIABLE speed furnace with a multi-stage/variable speed AC
    2. A Whole Home Ventilating Dehumidifier 
    3. A Thermostat with a stand-alone control switch which automates humidification, ventilation, HVAC fan speed, and AC staging based on outside temperatures.
  2. Install an HVAC system which includes:
    1. A properly sized SINGLE stage furnace and AC 
    2. A Whole Home Ventilating Dehumidifier
    3. A Thermostat with a stand-alone control switch which automates humidification, ventilation, heating, and cooling based on outside temperatures.

The Top 2 Dehumidifiers we Recommend for the Chicago area:

Ultra-Aire XT105H - Energy Star-rated, this system will serve up to 2500 s.f. Use with a MERV 14 filter.

Ultra-Aire XT205H - Energy Star-rated, this system will serve up to 5000 s.f. Use with a MERV 14 filter.

We sell and install Ultra-Aire's full line of Ventilating Dehumidification products. Our highly trained team can find the best dehumidifier for your home or building. Call Today!

Now offering Quick and Easy Financing and Monthly Payment Plans!

We've partnered with Hearth to bring you financing options. A loan through Hearth will help you pay for your dehumidifier or other services with predictable, monthly payments.


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    Aeroseal Client, R.N.
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    P.R., Ottawa, IL
  • It's been cold here for the past few days and I really feel the difference in heating since the building was Aerosealed! My apartment is so much warmer now. Thank you Priority Energy!


    Miruna; Tenant at Country Manor Apartments, Peru, IL
  • Anytime I can be a reference for all the great work on my (new) house, please let me know.  Priority Energy is outstanding at what they do!

    Executive at Medline Industries, IL
  • I have a two story home built in the mid seventies. Lots of temperature fluctuation between the floors. The Aeroseal process dramatically increased the air flow to the second floor. Good experience. The company was very informative, answered a lot of questions.

    Vince from Oakbrook, IL
  • "It's been cold here for the past few days and I really feel the difference in heating since the Aeroseal, my apartment is so much warmer now. Thank you!"  

    MP from Peru, IL
  • Thank You so much for the super-fast turn around of our Manual J, D and S reprt for the Village of Glen Ellyn. Our original Manual J kept getting kicked back to us for corrections but your calculations/report got approved instantly-no questions asked and no more permit delays!

    Kim, Glen Ellyn, IL
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    Craig, HERS Rater, Batavia, IL
  • (Aeroseal) is a GREAT Product! Really made our townhouse more comfortable!

    Gordon; Chicago, IL
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    Bill; Downers Grove, IL
  • Duct sealing (with Aeroseal) was the smartest thing I ever did! Our home is sooooo much more comfortable! We were so very pleased with Priority Energy and their technicians!

    Richard; Lake Forest, IL
  • On to the Radon issue - Excellent results with Aeroseal!  From 5 + to a .4.  Before sealing like we discussed, I had warm air coming out of the sump basket with the furnace running. Even with the furnace running, it is still pulling air in now.

    Bill; Belvidere, IL
  • Pat was awesome and super helpful! We are experiencing weak air flow in the duct system of our 1950''s home and Pat gave us great recommendations to fix the problem when we do our remodel.

    David; Arlington Heights, IL
  • Already the house seems more balanced (since Aeroseal duct sealing yesterday) .. far end of house is getting more warm air flow!

    Bryan, November 2019, Chicago, IL
  • Priority Energy did a great job with an Aeroseal project for my home. The rooms are more comfortable and even throughout the house, including the far registers which never used to get significant airflow. Very honest and trustworthy

    Bryan, December 2019, Chicago, IL
  • I hired Priority to seal the ducts and air seal my home.  I have been very pleased with

    the results.  The personnel from this company are professional and quite competent.  I have literally saved

    Nelson, Lake Forest
  • Priority Energy did a great job with an Aeroseal project for my home. The rooms are more comfortable and even throughout the house, including the far registers which never used to get significant airflow.

    B. L., Chicago, IL Feb. 2020
  • Used Priority Energy to help insulate (Aeroseal) a property we purchased and could not have been happier.
    R. M., Lake Bluff, IL April 2020
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    D.F., Chicago, IL Feb. 2020
  • Employees were all very helpful and professional! Came out in a timely manner (to do our Duct Test). Would highly recommend this company!

    J. R. New Lenox, IL April 2020
  • I had Priority Energy analyze my older home for indoor air quality and comfort because I was having difficulty maintaining temperatures. They came out and discussed our options. We ended up sealing our ducts and installing a whole-house dehumidifier.

    D. L, Lake Zurich, IL Feb. 2019

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