Residential & Commercial Indoor Air Quality Solutions

Breathe Easier in Northern Illinois!

Make Your Home Healthier Today

  • Serving Crystal Lake Since 1986
  • We Work With All Makes And Models
  • 24/7 Emergency Service
  • NATE-Certified Technicians
  • Award-Winning HVAC Service

At Harmonic Heating & Air Conditioning, indoor air quality iS our passion. We all know someone who is affected by allergies — but for us, it hits closer to home. Our family has more than its fair share of allergy issues. The drive to improve the health of my family pushes me to constantly be on the cutting edge of air quality, a benefit we’re incredibly proud to pass on to our friends and neighbors in the Crystal Lake area!

Every indoor air quality product we offer has been tested in my own home first. I know with 100% certainty that these products work and will provide you with years of worry-free service. Contact us today to learn more about our indoor air quality products and services for your home or commercial space in McHenry County!

Indoor Air Quality IS Our Passion

We all know someone affected by allergies. But for me it hits very close to home since my family has more than its fair share of allergy issues. The desire to make my own family healthier pushes me to constantly be on the cutting edge of air quality. A benefit I pass on to you!

Every indoor air quality product we offer has been tested in my own home first. I know with 100% certainty that these products work and will provide you with years of worry-free service.

Harmonic is your local air conditioner replacement expert!
Schedule your AC estimate with Harmonic today.

Scorpion UVC-LED System

The Scorpion is a UVC-LED disinfection unique system designed for use in residential and light commercial HVAC systems. The LED light has 30,000 hours of run time and with an integrated air flow sensor the Scorpion UVC-LED can last up to 5 times longer than traditional UV bulbs. The Scorpion UVC-LED is designed to kill mold, mildew, bacteria, viruses, and other harmful biological growth in the HVAC system and on the evaporator coil. The system will also help reduce foul and musty odors like dirty sock smell and will even help keep the drain line from clogging due to buildup in the condensate line.

Electronic Air Cleaners

Air Cleaner Repair, Replacement & Installation

Airborne particles contain some pretty nasty stuff. Dust mites, mold spores and carcinogens – all floating around in the air you breathe. One way to reduce the amount of toxins you’re breathing is to upgrade your air filter. Electronic Air Cleaners capture up to 99% of airborne particles as compared to the standard fiberglass filter which only traps about 50%.

Energy Recovery Ventilation

ERV Repair, Replacement & Installation

According to the US Environmental Protection Agency, indoor air quality can be up to five times worse than outdoors. Why? Your home is a living, breathing thing. It is constantly creating and trapping cooking gases, your exhaled breath and off-gases from building materials. A ventilation system provides an efficient way to trade your dirty indoor air for fresh outdoor air. No matter what the weather’s doing outside.


Humidifier Repair, Replacement & Installation- Whole Home Humidification

A whole house humidifier will constantly monitor the moisture level in your home and keep it just right. Not only will you feel better, but you’ll spend less money on your heating bills each winter. More humidity will allow you to lower your temp AND raise your comfort. Win – Win!


Dehumidifier Repair, Replacement & Installation- Whole Home Dehumidification

Your air conditioner is designed to control temperature, not humidity. You need humidity control to maintain comfortable, healthy conditions in your home. Excessive humidity is not only uncomfortable in the summer; it can also lead to mold.


Whole Home In-Duct Air Purifier

The REME-HALO® utilizes RGF’s patented REME® Cell technology with UV-C light to create low level, airborne hydrogen peroxide throughout the air-conditioned space reducing airborne and surface bacteria, viruses, odors, and mold.

The REME-HALO® in-duct air purifier actively neutralizes pollutants at the source ensuring excellent indoor air quality.


Help protect your air and the environment

The HALO-LED™ is the industry’s first LED in-duct, whole home and building air purification system that is both mercury free and zero ozone compliant. The HALO-LED™ proactively treats every cubic inch of air conditioned space, reducing airborne and surface contaminants and pollutants through bi-polar ionization and revolutionary, patent pending, REME-LED™ technology.

Our Installation Process

Our Installation Process

Rock*Star Maintenance Plans

Our annual maintenance programs at Harmonic Heating & Air Conditioning provide a Smarter, Healthier, more Efficient home by providing the best heating and cooling systems on the planet.


$19 Per Month

$228 Annually

Best Value

$29/mo or $348 Annually

$456 Annually

Harmonic Heating & Air Conditioning is Your Local HVAC Experts in Crystal Lake

When you work with Harmonic Heating & Air Conditioning, our trained service technicians will sit down with you to discuss your needs and help you find the best air conditioning system for your budget.

We pride ourselves on working hard to ensure not only affordability, but quality and complete customer satisfaction as well. So whether you need air conditioning installation for a small home or an entire office building, our highly trained and experienced contractors will provide the speedy, high-quality service you can depend on.

Contact Our Team

Indoor Air Quality Solutions in Northern Illinois & McHenry County

Harmonic Heating & Air Conditioning in Crystal Lake, Illinois offers a range of indoor air quality services to ensure that your home or business has clean and healthy air. Our team of professionals is dedicated to providing top-notch service and customer satisfaction. Whether you need air duct cleaning, air purifier installation, or humidity control, we have the expertise and equipment to get the job done right. We understand the importance of breathing clean air and the impact it can have on your health and comfort. With our indoor air quality services, you can have peace of mind knowing that you are providing a safe and healthy environment for yourself and your loved ones. Contact Harmonic Heating & Air Conditioning today for all your indoor air quality needs near Crystal Lake.

Our staff will extend every effort to ensure your complete satisfaction. As our customer, you'll benefit from our:

  • Friendly, efficient office staff and crew
  • Premium-quality parts, materials, and workmanship
  • Prompt and efficient project completion
  • Policy of being available 24/7

At Harmonic Heating & Air Conditioning, we aspire to accommodate every HVAC need of our neighbors in Crystal Lake, Kane, Dupage, and their surrounding communities. Our broad range of skills and years of industry experience have already gained the trust of many of our neighbors, and we take personal pride in each and every job done well. Give us a call at Harmonic Heating & Air Conditioning to learn more about our indoor air quality services in Northern Illinois today.

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