Air Conditioning Repair, Air Conditioning Maintenance & HVAC RepairNorthbrook, IL, Chicago, IL & Skokie, IL

Living in Chicago, IL and surrounding areas, insufficient humidity is a problem for the majority of the year. When the air is overly dry, it feels cooler, resulting in more work for the heating system and higher monthly bills. Incorporating a whole-home humidifier makes a big improvement. The introduction of essential moisture provides superior comfort at lower thermostat settings. The humidifier not only works to pay for itself and lessens wear and tear on the heater but combats health issues and damage to home furnishings.

By accommodating the specific layout and square footage of your home, the air quality experts from Guardian Heating & Cooling Service ensure optimum results from your investment. We draw from well-renowned and technologically advanced Aprilaire humidifiers. Requiring minimal maintenance, operating almost silently and dispersing moisture throughout the living space, these leading innovations help your family sleep better, feel more productive and avoid concerns with headaches, chapped lips and aggravated symptoms of eczema, psoriasis, allergies and asthma.

Our NATE-certified technicians are knowledgeable in humidifiers, dehumidifiers and a wide variety of IAQ accessories to best serve your needs. We encourage you to explore options, take advantage of our extensive experience and take proactive measures to create a healthier, more comfortable and enjoyable home. We’re here to handle seamless installation, necessary maintenance and all types of repairs. Our friendly, affordable and dedicated services are available across Lincoln Park, Skokie, Chicago, Niles, Evanston, Wilmette, Park Ridge, and Morton Grove, IL.

Take a look at humidifier options:

Aprilaire Model 800 Humidifier – Considered the Most Efficient of ENERGY STAR 2021, this steam-style humidifier maintains an ideal range of 40-60% relative humidity for a coverage of up to 5,200 square feet. A user-friendly interactive display offers six levels of output, includes automatic startup for set and forget operation and supplies 11.5 to 34.6 gallons of moisture every 24 hours. Designed and manufactured in the USA, corrosion-resistant aluminum coils are built for lasting durability.

Aprilaire Model 700 Humidifier – Enhance comfort with a larger-capacity humidifier designed for homes up to 2,800 square feet. The built-in fan draws heated air from the furnace through the humidifier and offers an 18-gallon per day capacity. Optimizing humidity levels 24/7, dual sensors monitor and react to indoor conditions and outdoor temperature. A digital control allows you to decide whether the system runs continuously or only with furnace operation.

Aprilaire Model 500 Humidifier – Using natural evaporation, the unit effectively turns water into vapor and introduces necessary humidity throughout the whole home. Ideal for residences up to 2,000 square feet and providing a capacity of 12 gallons per day, dual sensor monitoring responds to outdoor temperature and indoor moisture levels 24/7. Digital control indicates maintenance requirements and accommodates non-stop operation or strictly when the furnace runs.

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Serving Chicago, IL and surrounding areas

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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
  • 30% off

    30% Off any repair preformed*


    *Restrictions apply. Cannot be combined with any other offers. Must present coupon at time of service.

    Expires: 12/31/2023

  • Save Thousands w/ Local & Federal Rebates

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    *Scheduling restrictions may apply. Limited spaces available. Ground-level residential equipment. Cannot be combined with any other offers. Must present coupon at time of service.

  • $99 Preventative Maintenance


    *Scheduling restrictions may apply. Limited spaces available. Ground-level residential equipment. Cannot be combined with any other offers. Must present coupon at time of service.

  • Mini-Split(Ductless) Installation

    $250.00 Off*


    *Restrictions apply. Cannot be combined with any other offers. Must present coupon at time of service.

    Expires: 12/31/2023

What our clients are saying

Paula HagertyPaula Hagerty
16:19 23 Jun 23
My air conditioner was not cooling properly so I contacted Guardian and they were out in 2 days to repair my air conditioner. My technician, Nelson, inspected my A/C unit, diagnosed the issue and made the repair quickly. He explained everything thoroughly and answered all of my questions. I highly recommend Guardian for your A/C and heating needs.
Charlie EvansCharlie Evans
16:35 03 Jun 23
Jasper Pitrello was extremely professional, patient, and helpful for us with the installation of a new mini split AC system. He even took time to diagnose the issue with our current system and estimate repair. He gave us a very positive, low pressure experience that we appreciated very much. This is our second experience with Guardian and we've been very impressed and would recommend them and Jasper to anyone.
james georgeffjames georgeff
19:47 25 May 23
We used Guardian to come and take a look at our system after we had a slight leak from the vent in our bathroom.Nelson came much earlier than expected (which was great), and was diligent and through with his assessment of our unit. He carefully explained the issues and how we should approach fixing and monitoring our system and I felt confident about our situation after he left.I would certainly use Guardian again and wouldn’t hesitate recommending them to a friend.
Josie SullivanJosie Sullivan
21:40 17 Mar 23
We are very pleased with Sergio's great customer service, knowledgeable, and professional service he provided while fixing our heating furnace issue. He explained what the problem was and what our options were. He went out of his way to thoroughly checked his work before leaving to make sure that our furnace issue was resolved. We will definitely ask for Sergio again should we have any more problems in the future. Nowadays, its hard to find an honest person that cares about his work and his customer. Thank you Sergio and Guardian.
James ReedyJames Reedy
20:19 14 Mar 23
Guardian came the same day I called to set up a repair appointment. Nelson, accompanied by apprentice JR, was professional and courteous. He explained the problem and the cause of the short cycling of my furnace, then discussed other services he thought I should be aware of, such as correcting the faulty installation of my hot water heater by a previous contractor. He also encouraged me to have Guardian do an annual inspection of by heating/cool systems. I was pleased with the service and the cost------just by basic service call price of $89!
Amy KhareAmy Khare
22:41 22 Nov 22
I have been a very happy customer of Guardian for years, after having difficult service with larger companies where the technicians circle in and out. What I appreciate the most from the Guardian team is how much they genuinely care about ensuring that we feel safe and secure in our home, as well as educated about our systems so we can ensure preventative maintenance. Today, I had an emergency with a gas leak. Within hours, Nelson was at our home, diagnosing the problem and ensuring resolution. He made sure that the system was running properly rather than just doing a quick fix and running out the door. He helped me feel reassured with the resolution. Megan, who works in the front office, has been a reliable support over the years to help ensure proactive scheduling and that my administrative records are kept and shared via email. This company knows customer service like its a pleasure for them!
Diana VillafuerteDiana Villafuerte
04:37 19 Nov 22
I have the protection plan for my boiler and part of that is an annual regular preventive maintenance service check. Fortunately, a staff member, Meghan, contacted me to renew my plan subscription and schedule an appointment. Service technician Nelson, along with trainee Ray, were assigned to my home. They both were professional and courteous. The PM check was thorough and efficient. They answered my questions and confirmed my system was working properly. I appreciate their professionalism and work ethic. I would request either of them for future service calls to my home. Overall, I'm pleased with Guardian Heating and would recommend their service.

Installing the best and servicing the rest!