The majority of homes in Chicago, IL and surrounding areas sacrifice up to 30% of their heated or cooled air to cracks and holes in the ductwork. These same flaws in the duct system draw in dust, bacteria, and all sorts of allergens, then spread them all over the house. You may notice one room is always chilly, excessive dust gathering on surfaces, unpleasant smells, and steadily increasing energy bills. Fortunately, these concerns are easy and affordable to resolve. Simply call Guardian Heating & Cooling Service at (708) 628-5443 for professional duct sealing services.

Professional Duct Sealing Service

Guardian Heating & Cooling Service specializes in the industry-leading technology known as Aeroseal. We fix imperfections in the ductwork from the inside out, effectively reaching the entirety of the system without disruption to the home. There’s no mess, and the whole process is completed in a couple of hours. The formula involves safe, non-toxic, adhesive polymer particles that are made of the same material found in baby pacifiers and chewing gum.

Give our team a call for duct sealing service you can count on!

According to the US Department of Energy, Aeroseal is one of the most rewarding energy technologies for American consumers. The NATE-certified, factory trained, fully licensed, insured, and bonded specialists from Guardian Heating & Cooling Service put this innovative process to work for you. You’ll immediately feel the difference in the comfort and cleanliness of your home. You also stand to save between $400 and $700 annually on your heating and cooling bills. Family owned and operated, Guardian Heating & Cooling Service is large enough to handle your needs and small enough to care. We provide affordable duct sealing throughout Lincoln Park, Skokie, Chicago, Niles, Evanston, Wilmette, Park Ridge, and Morton Grove, IL.

Serving Chicago, IL and surrounding areas

Save today with our special offers

You love getting good deals, so here are some coupons to show our appreciation for considering us for your next heating or cooling installation or repair.

Special Offers

$89.00 Preventative Maintenance Cleaning on a Residential Furnace, A/C, or Boiler

Regularly $109.00

(708) 628-5443


No ladder setup. Cannot be combined with any other offers or discounts.

Expires: 09/30/2019

$100 Off a Carrier Furnace, A/C, or Boiler

(708) 628-5443


Cannot be combined with any other offers or discounts.

Expires: 09/30/2019

What our clients are saying

Mo W.

Guardian is a top notch company and John is one of the most outstanding technicians I’ve ever worked with. He’s a trustworthy contractor who explains potential issues as he finds them, and breaks down the process of replacement so that anyone can understand it. I own 12 HVAC systems and I’ve seen more than my share of maintenance. I’ve used Guardian for years and these guys are simply the best.

Keith B.

Have used Guardian for years. Recently had a new furnace and central air installed and I couldn’t be happier. I really trust them because the workers are always extremely knowledgeable, good problem solvers, and they explain everything in terms I can understand. The guys are always very nice, and respectful, also. Highly recommend Guardian Heating & Cooling.

Laurie E.

Just had another great maintenance visit to prepare my old A/C units (2) for the summer. John was thorough and informative. Great job.

I have used Guardian Heating for over 15 years. And my original Rheem furnaces(zoned heat) are still running! I use their maintenance contracts to get reminders, advance scheduling and discounts on annual furnace and A/C checkups/cleaning. They are always quick to respond to a service request. I highly recommend them.

We service all makes and models